NEWS
author wenzelm
Tue Jun 03 00:20:22 2008 +0200 (2008-06-03)
changeset 27061 a057cb0d7d55
parent 27008 9e39f5403db7
child 27067 f8a7aff41acb
permissions -rw-r--r--
reorganized isar-ref;
wenzelm@5363
     1
Isabelle NEWS -- history user-relevant changes
wenzelm@5363
     2
==============================================
wenzelm@2553
     3
wenzelm@27008
     4
New in Isabelle2008 (June 2008)
wenzelm@27008
     5
-------------------------------
wenzelm@25464
     6
wenzelm@25522
     7
*** General ***
wenzelm@25522
     8
wenzelm@27061
     9
* The Isabelle/Isar Reference Manual (isar-ref) has been reorganized
wenzelm@27061
    10
and updated, with formally checked references as hyperlinks.
wenzelm@27061
    11
wenzelm@25579
    12
* Syntax: symbol \<chi> is now considered a letter.  Potential
wenzelm@25579
    13
INCOMPATIBILITY in identifier syntax etc.
wenzelm@25579
    14
wenzelm@25579
    15
* Outer syntax: string tokens may contain arbitrary character codes
wenzelm@25579
    16
specified via 3 decimal digits (as in SML).  E.g. "foo\095bar" for
wenzelm@25579
    17
"foo_bar".
wenzelm@25522
    18
wenzelm@26006
    19
* Outer syntax: string tokens no longer admit escaped white space,
wenzelm@26006
    20
which was an accidental (undocumented) feature.  INCOMPATIBILITY, use
wenzelm@26006
    21
white space directly.
wenzelm@26006
    22
wenzelm@25994
    23
* Theory loader: use_thy (and similar operations) no longer set the
wenzelm@25994
    24
implicit ML context, which was occasionally hard to predict and in
wenzelm@25994
    25
conflict with concurrency.  INCOMPATIBILITY, use ML within Isar which
wenzelm@25994
    26
provides a proper context already.
wenzelm@25994
    27
wenzelm@26323
    28
* Theory loader: old-style ML proof scripts being *attached* to a thy
wenzelm@26323
    29
file are no longer supported.  INCOMPATIBILITY, regular 'uses' and
wenzelm@26323
    30
'use' within a theory file will do the job.
wenzelm@26323
    31
wenzelm@26650
    32
* Name space merge now observes canonical order, i.e. the second space
wenzelm@26650
    33
is inserted into the first one, while existing entries in the first
wenzelm@26659
    34
space take precedence.  INCOMPATIBILITY in rare situations, may try to
wenzelm@26650
    35
swap theory imports.
wenzelm@26650
    36
wenzelm@25522
    37
haftmann@25502
    38
*** Pure ***
haftmann@25502
    39
wenzelm@26718
    40
* Context-dependent token translations.  Default setup reverts locally
wenzelm@26718
    41
fixed variables, and adds hilite markup for undeclared frees.
wenzelm@26718
    42
berghofe@26681
    43
* Unused theorems can be found using the new command 'unused_thms'.
berghofe@26681
    44
There are three ways of invoking it:
berghofe@26681
    45
berghofe@26681
    46
(1) unused_thms
berghofe@26681
    47
     Only finds unused theorems in the current theory.
berghofe@26681
    48
berghofe@26681
    49
(2) unused_thms thy_1 ... thy_n -
berghofe@26681
    50
     Finds unused theorems in the current theory and all of its ancestors,
berghofe@26681
    51
     excluding the theories thy_1 ... thy_n and all of their ancestors.
berghofe@26681
    52
berghofe@26681
    53
(3) unused_thms thy_1 ... thy_n - thy'_1 ... thy'_m
berghofe@26681
    54
     Finds unused theorems in the theories thy'_1 ... thy'_m and all of
berghofe@26681
    55
     their ancestors, excluding the theories thy_1 ... thy_n and all of
berghofe@26681
    56
     their ancestors.
berghofe@26681
    57
wenzelm@26718
    58
In order to increase the readability of the list produced by
wenzelm@26718
    59
unused_thms, theorems that have been created by a particular instance
wenzelm@26874
    60
of a theory command such as 'inductive' or 'function' are considered
wenzelm@26874
    61
to belong to the same "group", meaning that if at least one theorem in
wenzelm@26718
    62
this group is used, the other theorems in the same group are no longer
wenzelm@26718
    63
reported as unused.  Moreover, if all theorems in the group are
wenzelm@26718
    64
unused, only one theorem in the group is displayed.
wenzelm@26718
    65
wenzelm@26718
    66
Note that proof objects have to be switched on in order for
wenzelm@26718
    67
unused_thms to work properly (i.e. !proofs must be >= 1, which is
wenzelm@26874
    68
usually the case when using Proof General with the default settings).
berghofe@26681
    69
wenzelm@26650
    70
* Authentic naming of facts disallows ad-hoc overwriting of previous
wenzelm@26650
    71
theorems within the same name space.  INCOMPATIBILITY, need to remove
wenzelm@26650
    72
duplicate fact bindings, or even accidental fact duplications.  Note
wenzelm@26650
    73
that tools may maintain dynamically scoped facts systematically, using
wenzelm@26650
    74
PureThy.add_thms_dynamic.
wenzelm@26650
    75
wenzelm@26660
    76
* Command 'hide' now allows to hide from "fact" name space as well.
wenzelm@26660
    77
wenzelm@26496
    78
* Eliminated destructive theorem database, simpset, claset, and
wenzelm@26496
    79
clasimpset.  Potential INCOMPATIBILITY, really need to observe linear
wenzelm@26496
    80
update of theories within ML code.
wenzelm@26479
    81
wenzelm@26955
    82
* Eliminated theory ProtoPure and CPure, leaving just one Pure theory.
wenzelm@26955
    83
INCOMPATIBILITY, object-logics depending on former Pure require
wenzelm@26955
    84
additional setup PureThy.old_appl_syntax_setup; object-logics
wenzelm@26955
    85
depending on former CPure need to refer to Pure.
wenzelm@26650
    86
wenzelm@26495
    87
* Commands 'use' and 'ML' are now purely functional, operating on
wenzelm@26479
    88
theory/local_theory.  Removed former 'ML_setup' (on theory), use 'ML'
wenzelm@26479
    89
instead.  Added 'ML_val' as mere diagnostic replacement for 'ML'.
wenzelm@26479
    90
INCOMPATIBILITY.
wenzelm@26479
    91
wenzelm@26874
    92
* Command 'setup': discontinued implicit version with ML reference.
wenzelm@26434
    93
wenzelm@25970
    94
* Instantiation target allows for simultaneous specification of class
wenzelm@25970
    95
instance operations together with an instantiation proof.
wenzelm@25970
    96
Type-checking phase allows to refer to class operations uniformly.
wenzelm@25970
    97
See HOL/Complex/Complex.thy for an Isar example and
wenzelm@26180
    98
HOL/Library/Eval.thy for an ML example.
haftmann@25502
    99
wenzelm@26201
   100
* Indexing of literal facts: be more serious about including only
wenzelm@26201
   101
facts from the visible specification/proof context, but not the
wenzelm@26201
   102
background context (locale etc.).  Affects `prop` notation and method
wenzelm@26201
   103
"fact".  INCOMPATIBILITY: need to name facts explicitly in rare
wenzelm@26201
   104
situations.
wenzelm@26201
   105
wenzelm@26925
   106
* Method "cases", "induct", "coinduct": removed obsolete/undocumented
wenzelm@26925
   107
"(open)" option, which used to expose internal bound variables to the
wenzelm@26925
   108
proof text.
wenzelm@26925
   109
wenzelm@26925
   110
* Isar statements: removed obsolete case "rule_context".
wenzelm@26925
   111
INCOMPATIBILITY, better use explicit fixes/assumes.
wenzelm@26925
   112
wenzelm@26874
   113
* Locale proofs: default proof step now includes 'unfold_locales';
wenzelm@26874
   114
hence 'proof' without argument may be used to unfold locale
wenzelm@26874
   115
predicates.
ballarin@26765
   116
ballarin@26765
   117
haftmann@26762
   118
*** Document preparation ***
haftmann@26762
   119
wenzelm@26914
   120
* Simplified pdfsetup.sty: color/hyperref is used unconditionally for
wenzelm@26914
   121
both pdf and dvi (hyperlinks usually work in xdvi as well); removed
wenzelm@26914
   122
obsolete thumbpdf setup (contemporary PDF viewers do this on the
wenzelm@26914
   123
spot); renamed link color from "darkblue" to "linkcolor" (default
wenzelm@26920
   124
value unchanged, can be redefined via \definecolor); no longer sets
wenzelm@26920
   125
"a4paper" option (unnecessary or even intrusive).
wenzelm@26914
   126
wenzelm@27008
   127
* Antiquotation @{lemma A method} proves proposition A by the given
wenzelm@27008
   128
method (either a method name or a method name plus (optional) method
wenzelm@27008
   129
arguments in parentheses) and prints A just like @{prop A}.
haftmann@26762
   130
haftmann@26762
   131
wenzelm@25464
   132
*** HOL ***
wenzelm@25464
   133
berghofe@26964
   134
* Turned the type of sets "'a set" into an abbreviation for "'a => bool"
berghofe@26964
   135
berghofe@26964
   136
  INCOMPATIBILITIES:
berghofe@26964
   137
wenzelm@27008
   138
  - Definitions of overloaded constants on sets have to be replaced by
wenzelm@27008
   139
    definitions on => and bool.
berghofe@26964
   140
berghofe@26964
   141
  - Some definitions of overloaded operators on sets can now be proved
wenzelm@27008
   142
    using the definitions of the operators on => and bool.  Therefore,
wenzelm@27008
   143
    the following theorems have been renamed:
berghofe@26964
   144
berghofe@26964
   145
      subset_def   -> subset_eq
berghofe@26964
   146
      psubset_def  -> psubset_eq
berghofe@26964
   147
      set_diff_def -> set_diff_eq
berghofe@26964
   148
      Compl_def    -> Compl_eq
berghofe@26964
   149
      Sup_set_def  -> Sup_set_eq
berghofe@26964
   150
      Inf_set_def  -> Inf_set_eq
berghofe@26964
   151
      sup_set_def  -> sup_set_eq
berghofe@26964
   152
      inf_set_def  -> inf_set_eq
berghofe@26964
   153
berghofe@26964
   154
  - Due to the incompleteness of the HO unification algorithm, some
berghofe@26964
   155
    rules such as subst may require manual instantiation, if some of
berghofe@26964
   156
    the unknowns in the rule is a set.
berghofe@26964
   157
berghofe@26964
   158
  - Higher order unification and forward proofs:
berghofe@26964
   159
    The proof pattern
berghofe@26964
   160
berghofe@26964
   161
      have "P (S::'a set)" <...>
berghofe@26964
   162
      then have "EX S. P S" ..
berghofe@26964
   163
wenzelm@27008
   164
    no longer works (due to the incompleteness of the HO unification
wenzelm@27008
   165
    algorithm) and must be replaced by the pattern
berghofe@26964
   166
berghofe@26964
   167
      have "EX S. P S"
berghofe@26964
   168
      proof
berghofe@26964
   169
        show "P S" <...>
berghofe@26964
   170
      qed
berghofe@26964
   171
berghofe@26964
   172
  - Calculational reasoning with subst (or similar rules):
berghofe@26964
   173
    The proof pattern
berghofe@26964
   174
berghofe@26964
   175
      have "P (S::'a set)" <...>
berghofe@26964
   176
      also have "S = T" <...>
berghofe@26964
   177
      finally have "P T" .
berghofe@26964
   178
wenzelm@27008
   179
    no longer works (for similar reasons as the previous example) and
wenzelm@27008
   180
    must be replaced by something like
berghofe@26964
   181
berghofe@26964
   182
      have "P (S::'a set)" <...>
berghofe@26964
   183
      moreover have "S = T" <...>
berghofe@26964
   184
      ultimately have "P T" by simp
berghofe@26964
   185
berghofe@26964
   186
  - Tactics or packages written in ML code:
berghofe@26964
   187
    Code performing pattern matching on types via
berghofe@26964
   188
berghofe@26964
   189
      Type ("set", [T]) => ...
berghofe@26964
   190
wenzelm@27008
   191
    must be rewritten. Moreover, functions like strip_type or
wenzelm@27008
   192
    binder_types no longer return the right value when applied to a
wenzelm@27008
   193
    type of the form
berghofe@26964
   194
berghofe@26964
   195
      T1 => ... => Tn => U => bool
berghofe@26964
   196
berghofe@26964
   197
    rather than
berghofe@26964
   198
berghofe@26964
   199
      T1 => ... => Tn => U set
berghofe@26964
   200
wenzelm@26874
   201
* Merged theories Wellfounded_Recursion, Accessible_Part and
wenzelm@26874
   202
Wellfounded_Relations to "Wellfounded.thy".
krauss@26748
   203
haftmann@26513
   204
* Explicit class "eq" for executable equality.  INCOMPATIBILITY.
haftmann@26513
   205
wenzelm@26874
   206
* Class finite no longer treats UNIV as class parameter.  Use class
wenzelm@26874
   207
enum from theory Library/Enum instead to achieve a similar effect.
haftmann@26445
   208
INCOMPATIBILITY.
haftmann@26445
   209
wenzelm@26874
   210
* Theory List: rule list_induct2 now has explicitly named cases "Nil"
wenzelm@26874
   211
and "Cons".  INCOMPATIBILITY.
wenzelm@26874
   212
wenzelm@26422
   213
* HOL (and FOL): renamed variables in rules imp_elim and swap.
wenzelm@26422
   214
Potential INCOMPATIBILITY.
wenzelm@26422
   215
wenzelm@26874
   216
* Theory Product_Type: duplicated lemmas split_Pair_apply and
wenzelm@26874
   217
injective_fst_snd removed, use split_eta and prod_eqI instead.
wenzelm@26874
   218
Renamed upd_fst to apfst and upd_snd to apsnd.  INCOMPATIBILITY.
haftmann@26355
   219
wenzelm@26335
   220
* Theory Nat: removed redundant lemmas that merely duplicate lemmas of
wenzelm@26335
   221
the same name in theory Orderings:
wenzelm@26335
   222
wenzelm@26335
   223
  less_trans
wenzelm@26335
   224
  less_linear
wenzelm@26335
   225
  le_imp_less_or_eq
wenzelm@26335
   226
  le_less_trans
wenzelm@26335
   227
  less_le_trans
wenzelm@26335
   228
  less_not_sym
wenzelm@26335
   229
  less_asym
wenzelm@26335
   230
wenzelm@26335
   231
Renamed less_imp_le to less_imp_le_nat, and less_irrefl to
wenzelm@26335
   232
less_irrefl_nat.  Potential INCOMPATIBILITY due to more general types
wenzelm@26335
   233
and different variable names.
wenzelm@26315
   234
haftmann@26231
   235
* Library/Option_ord.thy: Canonical order on option type.
haftmann@26231
   236
wenzelm@27008
   237
* Library/RBT.thy: Red-black trees, an efficient implementation of
wenzelm@27008
   238
finite maps.
krauss@26197
   239
haftmann@26231
   240
* Library/Countable.thy: Type class for countable types.
haftmann@26231
   241
wenzelm@26180
   242
* Theory Int: The representation of numerals has changed.  The infix
wenzelm@26180
   243
operator BIT and the bit datatype with constructors B0 and B1 have
wenzelm@26180
   244
disappeared.  INCOMPATIBILITY, use "Int.Bit0 x" and "Int.Bit1 y" in
wenzelm@26180
   245
place of "x BIT bit.B0" and "y BIT bit.B1", respectively.  Theorems
wenzelm@26180
   246
involving BIT, B0, or B1 have been renamed with "Bit0" or "Bit1"
wenzelm@26180
   247
accordingly.
wenzelm@26180
   248
wenzelm@26180
   249
* Theory Nat: definition of <= and < on natural numbers no longer
wenzelm@26180
   250
depend on well-founded relations.  INCOMPATIBILITY.  Definitions
wenzelm@26180
   251
le_def and less_def have disappeared.  Consider lemmas not_less
wenzelm@26180
   252
[symmetric, where ?'a = nat] and less_eq [symmetric] instead.
wenzelm@26180
   253
wenzelm@26180
   254
* Theory Finite_Set: locales ACf, ACe, ACIf, ACIfSL and ACIfSLlin
wenzelm@26180
   255
(whose purpose mainly is for various fold_set functionals) have been
wenzelm@26874
   256
abandoned in favor of the existing algebraic classes
wenzelm@26180
   257
ab_semigroup_mult, comm_monoid_mult, ab_semigroup_idem_mult,
wenzelm@26180
   258
lower_semilattice (resp. upper_semilattice) and linorder.
haftmann@26139
   259
INCOMPATIBILITY.
haftmann@26041
   260
wenzelm@26180
   261
* Theory Transitive_Closure: induct and cases rules now declare proper
wenzelm@26180
   262
case_names ("base" and "step").  INCOMPATIBILITY.
wenzelm@26180
   263
wenzelm@26180
   264
* Theorem Inductive.lfp_ordinal_induct generalized to complete
wenzelm@26180
   265
lattices.  The form set-specific version is available as
wenzelm@26180
   266
Inductive.lfp_ordinal_induct_set.
haftmann@26013
   267
wenzelm@26874
   268
* Renamed theorems "power.simps" to "power_int.simps".
haftmann@25961
   269
wenzelm@26180
   270
* Class semiring_div provides basic abstract properties of semirings
haftmann@25942
   271
with division and modulo operations.  Subsumes former class dvd_mod.
haftmann@25942
   272
wenzelm@26180
   273
* Merged theories IntDef, Numeral and IntArith into unified theory
wenzelm@26180
   274
Int.  INCOMPATIBILITY.
wenzelm@26180
   275
wenzelm@26180
   276
* Theory Library/Code_Index: type "index" now represents natural
wenzelm@26180
   277
numbers rather than integers.  INCOMPATIBILITY.
wenzelm@26180
   278
wenzelm@26180
   279
* New class "uminus" with operation "uminus" (split of from class
wenzelm@26180
   280
"minus" which now only has operation "minus", binary).
haftmann@25919
   281
INCOMPATIBILITY.
haftmann@25919
   282
haftmann@25557
   283
* New primrec package.  Specification syntax conforms in style to
wenzelm@26180
   284
definition/function/....  No separate induction rule is provided.  The
wenzelm@26180
   285
"primrec" command distinguishes old-style and new-style specifications
haftmann@25599
   286
by syntax.  The former primrec package is now named OldPrimrecPackage.
haftmann@26355
   287
When adjusting theories, beware: constants stemming from new-style
haftmann@25609
   288
primrec specifications have authentic syntax.
haftmann@25557
   289
wenzelm@25522
   290
* Library/Multiset: {#a, b, c#} abbreviates {#a#} + {#b#} + {#c#}.
wenzelm@25522
   291
wenzelm@26180
   292
* Library/ListVector: new theory of arithmetic vector operations.
nipkow@25900
   293
wenzelm@26874
   294
* Library/Order_Relation: new theory of various orderings as sets of
wenzelm@26874
   295
pairs.  Defines preorders, partial orders, linear orders and
wenzelm@26874
   296
well-orders on sets and on types.
nipkow@26500
   297
wenzelm@25522
   298
* Constants "card", "internal_split", "option_map" now with authentic
haftmann@25919
   299
syntax.  INCOMPATIBILITY.
wenzelm@25522
   300
wenzelm@25522
   301
* Definitions subset_def, psubset_def, set_diff_def, Compl_def,
wenzelm@25522
   302
le_bool_def, less_bool_def, le_fun_def, less_fun_def, inf_bool_def,
wenzelm@25522
   303
sup_bool_def, Inf_bool_def, Sup_bool_def, inf_fun_def, sup_fun_def,
wenzelm@25522
   304
Inf_fun_def, Sup_fun_def, inf_set_def, sup_set_def, Inf_set_def,
wenzelm@25522
   305
Sup_set_def, le_def, less_def, option_map_def now with object
haftmann@25919
   306
equality.  INCOMPATIBILITY.
wenzelm@25464
   307
wenzelm@26180
   308
* Method "induction_scheme" derives user-specified induction rules
wenzelm@26874
   309
from well-founded induction and completeness of patterns. This factors
krauss@25664
   310
out some operations that are done internally by the function package
krauss@25664
   311
and makes them available separately. See "HOL/ex/Induction_Scheme.thy"
krauss@25664
   312
for examples,
krauss@25664
   313
schirmer@25705
   314
* Records. Removed K_record, and replaced it by pure lambda term
wenzelm@25726
   315
%x. c. The simplifier setup is now more robust against eta expansion.
schirmer@25705
   316
INCOMPATIBILITY: in cases explicitly referring to K_record.
wenzelm@25464
   317
wenzelm@25726
   318
* Metis prover is now an order of magnitude faster, and also works
wenzelm@25726
   319
with multithreading.
wenzelm@25726
   320
wenzelm@26874
   321
* Metis: the maximum number of clauses that can be produced from a
wenzelm@26874
   322
theorem is now given by the attribute max_clauses. Theorems that
wenzelm@26874
   323
exceed this number are ignored, with a warning printed.
wenzelm@26874
   324
wenzelm@26874
   325
* Sledgehammer no longer produces structured proofs by default. To
wenzelm@26874
   326
enable, declare [[sledgehammer_full = true]]. Attributes
wenzelm@26874
   327
reconstruction_modulus, reconstruction_sorts renamed
wenzelm@26874
   328
sledgehammer_modulus, sledgehammer_sorts.  INCOMPATIBILITY.
wenzelm@26874
   329
wenzelm@27008
   330
* More flexible generation of measure functions for termination
wenzelm@27008
   331
proofs: Measure functions can be declared by proving a rule of the
wenzelm@27008
   332
form "is_measure f" and giving it the [measure_function] attribute.
wenzelm@27008
   333
The "is_measure" predicate is logically meaningless (always true), and
krauss@26877
   334
just guides the heuristic.  To find suitable measure functions, the
krauss@26877
   335
termination prover sets up the goal "is_measure ?f" of the appropriate
krauss@26877
   336
type and generates all solutions by prolog-style backwards proof using
krauss@26877
   337
the declared rules.
krauss@26877
   338
krauss@26877
   339
This setup also deals with rules like 
krauss@26877
   340
krauss@26877
   341
  "is_measure f ==> is_measure (list_size f)"
krauss@26877
   342
krauss@26877
   343
which accomodates nested datatypes that recurse through lists. Similar
krauss@26877
   344
rules are predeclared for products and option types.
krauss@26877
   345
wenzelm@25726
   346
krauss@26197
   347
*** ZF ***
krauss@26197
   348
wenzelm@26874
   349
* Renamed some theories to allow to loading both ZF and HOL in the
wenzelm@26874
   350
same session:
wenzelm@26874
   351
wenzelm@26874
   352
  Datatype  -> Datatype_ZF
wenzelm@26874
   353
  Inductive -> Inductive_ZF
wenzelm@26874
   354
  Int       -> Int_ZF
wenzelm@26874
   355
  IntDiv    -> IntDiv_ZF
wenzelm@26874
   356
  Nat       -> Nat_ZF
wenzelm@26874
   357
  List      -> List_ZF
wenzelm@26874
   358
  Main      -> Main_ZF
wenzelm@26874
   359
wenzelm@26874
   360
INCOMPATIBILITY: ZF theories that import individual theories below
wenzelm@26874
   361
Main might need to be adapted.  Regular theory Main is still
wenzelm@26874
   362
available, as trivial extension of Main_ZF.
krauss@26197
   363
krauss@26197
   364
wenzelm@25737
   365
*** ML ***
wenzelm@25737
   366
wenzelm@26401
   367
* Functor NamedThmsFun: data is available to the user as dynamic fact
wenzelm@26724
   368
(of the same name).  Removed obsolete print command.
wenzelm@26401
   369
wenzelm@26387
   370
* Removed obsolete "use_legacy_bindings" function.  INCOMPATIBILITY.
wenzelm@26387
   371
wenzelm@26188
   372
* ML within Isar: antiquotation @{const name} or @{const
wenzelm@26188
   373
name(typargs)} produces statically-checked Const term.
wenzelm@26188
   374
wenzelm@25737
   375
* The ``print mode'' is now a thread-local value derived from a global
wenzelm@25737
   376
template (the former print_mode reference), thus access becomes
wenzelm@25737
   377
non-critical.  The global print_mode reference is for session
wenzelm@25737
   378
management only; user-code should use print_mode_value,
wenzelm@25737
   379
print_mode_active, PrintMode.setmp etc.  INCOMPATIBILITY.
wenzelm@25737
   380
wenzelm@26874
   381
* Functions system/system_out provide a robust way to invoke external
wenzelm@27008
   382
shell commands, with propagation of interrupts (requires Poly/ML 5.2).
wenzelm@26874
   383
Do not use OS.Process.system etc. from the basis library!
wenzelm@26222
   384
wenzelm@25737
   385
wenzelm@25626
   386
*** System ***
wenzelm@25626
   387
wenzelm@26575
   388
* YXML notation provides a simple and efficient alternative to
wenzelm@26575
   389
standard XML transfer syntax.  See src/Pure/General/yxml.ML and
wenzelm@26575
   390
isatool yxml as described in the Isabelle system manual.
wenzelm@26575
   391
wenzelm@26575
   392
* Removed obsolete THIS_IS_ISABELLE_BUILD feature.  NB: the documented
wenzelm@26575
   393
way of changing the user's settings is via
wenzelm@26218
   394
ISABELLE_HOME_USER/etc/settings, which is a fully featured bash
wenzelm@26218
   395
script.
wenzelm@26218
   396
wenzelm@25971
   397
* Default settings: PROOFGENERAL_OPTIONS no longer impose xemacs ---
wenzelm@25971
   398
in accordance with Proof General 3.7, which prefers GNU emacs.
wenzelm@25970
   399
wenzelm@25776
   400
* Multithreading.max_threads := 0 refers to the number of actual CPU
wenzelm@25776
   401
cores of the underlying machine, which is a good starting point for
wenzelm@25776
   402
optimal performance tuning.  The corresponding usedir option -M allows
wenzelm@25778
   403
"max" as an alias for "0".  WARNING: does not work on certain versions
wenzelm@25778
   404
of Mac OS (with Poly/ML 5.1).
wenzelm@25776
   405
wenzelm@25626
   406
* isatool tty runs Isabelle process with plain tty interaction;
wenzelm@25626
   407
optional line editor may be specified via ISABELLE_LINE_EDITOR
wenzelm@25626
   408
setting, the default settings attempt to locate "ledit" and "rlwrap".
wenzelm@25626
   409
wenzelm@25651
   410
* isatool browser now works with Cygwin as well, using general
wenzelm@25651
   411
"javapath" function defined in Isabelle process environment.
wenzelm@25651
   412
wenzelm@25651
   413
* isabelle-process: non-ML sessions are run with "nice", to prevent
wenzelm@25651
   414
Isabelle from flooding interactive front-ends (notably ProofGeneral /
wenzelm@25651
   415
XEmacs).
wenzelm@25651
   416
wenzelm@25652
   417
* JVM class isabelle.IsabelleProcess (located in Isabelle/lib/classes)
wenzelm@25651
   418
provides general wrapper for managing an Isabelle process in a robust
wenzelm@25651
   419
fashion, with ``cooked'' output from stdin/stderr.
wenzelm@25651
   420
wenzelm@25855
   421
* Rudimentary Isabelle plugin for jEdit (see Isabelle/lib/jedit),
wenzelm@25855
   422
based on Isabelle/JVM process wrapper (see Isabelle/lib/classes).
wenzelm@25855
   423
wenzelm@25626
   424
wenzelm@25464
   425
wenzelm@25429
   426
New in Isabelle2007 (November 2007)
wenzelm@25429
   427
-----------------------------------
wenzelm@17754
   428
wenzelm@17754
   429
*** General ***
wenzelm@17754
   430
wenzelm@22826
   431
* More uniform information about legacy features, notably a
wenzelm@22826
   432
warning/error of "Legacy feature: ...", depending on the state of the
wenzelm@23367
   433
tolerate_legacy_features flag (default true). FUTURE INCOMPATIBILITY:
wenzelm@23367
   434
legacy features will disappear eventually.
wenzelm@22826
   435
wenzelm@17918
   436
* Theory syntax: the header format ``theory A = B + C:'' has been
wenzelm@17918
   437
discontinued in favour of ``theory A imports B C begin''.  Use isatool
wenzelm@17918
   438
fixheaders to convert existing theory files.  INCOMPATIBILITY.
wenzelm@17918
   439
wenzelm@17918
   440
* Theory syntax: the old non-Isar theory file format has been
wenzelm@17918
   441
discontinued altogether.  Note that ML proof scripts may still be used
wenzelm@17918
   442
with Isar theories; migration is usually quite simple with the ML
wenzelm@17918
   443
function use_legacy_bindings.  INCOMPATIBILITY.
wenzelm@17918
   444
wenzelm@22871
   445
* Theory syntax: some popular names (e.g. 'class', 'declaration',
wenzelm@22871
   446
'fun', 'help', 'if') are now keywords.  INCOMPATIBILITY, use double
wenzelm@22871
   447
quotes.
wenzelm@19814
   448
wenzelm@23888
   449
* Theory loader: be more serious about observing the static theory
wenzelm@23888
   450
header specifications (including optional directories), but not the
wenzelm@24172
   451
accidental file locations of previously successful loads.  The strict
wenzelm@24172
   452
update policy of former update_thy is now already performed by
wenzelm@24172
   453
use_thy, so the former has been removed; use_thys updates several
wenzelm@24172
   454
theories simultaneously, just as 'imports' within a theory header
wenzelm@24172
   455
specification, but without merging the results.  Potential
wenzelm@24172
   456
INCOMPATIBILITY: may need to refine theory headers and commands
wenzelm@24172
   457
ROOT.ML which depend on load order.
wenzelm@23888
   458
wenzelm@23888
   459
* Theory loader: optional support for content-based file
wenzelm@23888
   460
identification, instead of the traditional scheme of full physical
wenzelm@23889
   461
path plus date stamp; configured by the ISABELLE_FILE_IDENT setting
wenzelm@23888
   462
(cf. the system manual).  The new scheme allows to work with
wenzelm@23888
   463
non-finished theories in persistent session images, such that source
wenzelm@23888
   464
files may be moved later on without requiring reloads.
wenzelm@23888
   465
wenzelm@24187
   466
* Theory loader: old-style ML proof scripts being *attached* to a thy
wenzelm@24187
   467
file (with the same base name as the theory) are considered a legacy
wenzelm@24800
   468
feature, which will disappear eventually. Even now, the theory loader
wenzelm@24800
   469
no longer maintains dependencies on such files.
wenzelm@24800
   470
wenzelm@24800
   471
* Syntax: the scope for resolving ambiguities via type-inference is
wenzelm@24800
   472
now limited to individual terms, instead of whole simultaneous
wenzelm@24234
   473
specifications as before. This greatly reduces the complexity of the
wenzelm@24234
   474
syntax module and improves flexibility by separating parsing and
wenzelm@24234
   475
type-checking. INCOMPATIBILITY: additional type-constraints (explicit
wenzelm@24234
   476
'fixes' etc.) are required in rare situations.
wenzelm@24234
   477
wenzelm@25034
   478
* Syntax: constants introduced by new-style packages ('definition',
wenzelm@25034
   479
'abbreviation' etc.) are passed through the syntax module in
wenzelm@25034
   480
``authentic mode''. This means that associated mixfix annotations
wenzelm@25034
   481
really stick to such constants, independently of potential name space
wenzelm@25034
   482
ambiguities introduced later on. INCOMPATIBILITY: constants in parse
wenzelm@25034
   483
trees are represented slightly differently, may need to adapt syntax
wenzelm@25034
   484
translations accordingly. Use CONST marker in 'translations' and
wenzelm@25034
   485
@{const_syntax} antiquotation in 'parse_translation' etc.
wenzelm@25034
   486
wenzelm@17981
   487
* Legacy goal package: reduced interface to the bare minimum required
wenzelm@17981
   488
to keep existing proof scripts running.  Most other user-level
wenzelm@17981
   489
functions are now part of the OldGoals structure, which is *not* open
wenzelm@17981
   490
by default (consider isatool expandshort before open OldGoals).
wenzelm@17981
   491
Removed top_sg, prin, printyp, pprint_term/typ altogether, because
wenzelm@17981
   492
these tend to cause confusion about the actual goal (!) context being
wenzelm@17981
   493
used here, which is not necessarily the same as the_context().
wenzelm@17918
   494
wenzelm@23379
   495
* Command 'find_theorems': supports "*" wild-card in "name:"
wenzelm@23379
   496
criterion; "with_dups" option.  Certain ProofGeneral versions might
wenzelm@23379
   497
support a specific search form (see ProofGeneral/CHANGES).
webertj@22965
   498
wenzelm@20370
   499
* The ``prems limit'' option (cf. ProofContext.prems_limit) is now -1
wenzelm@20370
   500
by default, which means that "prems" (and also "fixed variables") are
wenzelm@20370
   501
suppressed from proof state output.  Note that the ProofGeneral
wenzelm@20370
   502
settings mechanism allows to change and save options persistently, but
wenzelm@20370
   503
older versions of Isabelle will fail to start up if a negative prems
wenzelm@20370
   504
limit is imposed.
wenzelm@20370
   505
wenzelm@21308
   506
* Local theory targets may be specified by non-nested blocks of
wenzelm@21308
   507
``context/locale/class ... begin'' followed by ``end''.  The body may
wenzelm@21308
   508
contain definitions, theorems etc., including any derived mechanism
wenzelm@21308
   509
that has been implemented on top of these primitives.  This concept
wenzelm@21308
   510
generalizes the existing ``theorem (in ...)'' towards more versatility
wenzelm@21308
   511
and scalability.
wenzelm@21308
   512
wenzelm@21960
   513
* Proof General interface: proper undo of final 'end' command;
wenzelm@21960
   514
discontinued Isabelle/classic mode (ML proof scripts).
wenzelm@21960
   515
wenzelm@17754
   516
wenzelm@17865
   517
*** Document preparation ***
wenzelm@17865
   518
wenzelm@21717
   519
* Added antiquotation @{theory name} which prints the given name,
wenzelm@21717
   520
after checking that it refers to a valid ancestor theory in the
wenzelm@21717
   521
current context.
haftmann@21339
   522
wenzelm@17869
   523
* Added antiquotations @{ML_type text} and @{ML_struct text} which
wenzelm@17869
   524
check the given source text as ML type/structure, printing verbatim.
wenzelm@17865
   525
wenzelm@21717
   526
* Added antiquotation @{abbrev "c args"} which prints the abbreviation
wenzelm@21717
   527
"c args == rhs" given in the current context.  (Any number of
wenzelm@21735
   528
arguments may be given on the LHS.)
wenzelm@21717
   529
wenzelm@21717
   530
wenzelm@17779
   531
*** Pure ***
wenzelm@17779
   532
wenzelm@24800
   533
* The 'class' package offers a combination of axclass and locale to
wenzelm@25129
   534
achieve Haskell-like type classes in Isabelle.  Definitions and
wenzelm@25129
   535
theorems within a class context produce both relative results (with
wenzelm@25129
   536
implicit parameters according to the locale context), and polymorphic
wenzelm@25129
   537
constants with qualified polymorphism (according to the class
wenzelm@25129
   538
context).  Within the body context of a 'class' target, a separate
wenzelm@25129
   539
syntax layer ("user space type system") takes care of converting
wenzelm@25129
   540
between global polymorphic consts and internal locale representation.
wenzelm@25177
   541
See src/HOL/ex/Classpackage.thy for examples (as well as main HOL).
haftmann@25184
   542
"isatool doc classes" provides a tutorial.
wenzelm@20807
   543
haftmann@25199
   544
* Generic code generator framework allows to generate executable
wenzelm@24800
   545
code for ML and Haskell (including Isabelle classes).  A short usage
wenzelm@24800
   546
sketch:
haftmann@20188
   547
haftmann@20188
   548
    internal compilation:
haftmann@25199
   549
        export_code <list of constants (term syntax)> in SML
haftmann@20453
   550
    writing SML code to a file:
haftmann@25199
   551
        export_code <list of constants (term syntax)> in SML <filename>
haftmann@22735
   552
    writing OCaml code to a file:
haftmann@25199
   553
        export_code <list of constants (term syntax)> in OCaml <filename>
haftmann@20188
   554
    writing Haskell code to a bunch of files:
haftmann@25199
   555
        export_code <list of constants (term syntax)> in Haskell <filename>
haftmann@25199
   556
haftmann@25199
   557
    evaluating closed propositions to True/False using code generation:
haftmann@25184
   558
        method ``eval''
haftmann@25184
   559
haftmann@25184
   560
Reasonable default setup of framework in HOL.
haftmann@20453
   561
haftmann@20453
   562
Theorem attributs for selecting and transforming function equations theorems:
haftmann@20453
   563
haftmann@22845
   564
    [code fun]:        select a theorem as function equation for a specific constant
haftmann@22845
   565
    [code fun del]:    deselect a theorem as function equation for a specific constant
haftmann@22845
   566
    [code inline]:     select an equation theorem for unfolding (inlining) in place
haftmann@22845
   567
    [code inline del]: deselect an equation theorem for unfolding (inlining) in place
haftmann@20453
   568
haftmann@22735
   569
User-defined serializations (target in {SML, OCaml, Haskell}):
haftmann@20453
   570
haftmann@20453
   571
    code_const <and-list of constants (term syntax)>
haftmann@20453
   572
      {(target) <and-list of const target syntax>}+
haftmann@20453
   573
haftmann@20453
   574
    code_type <and-list of type constructors>
haftmann@20453
   575
      {(target) <and-list of type target syntax>}+
haftmann@20453
   576
haftmann@20453
   577
    code_instance <and-list of instances>
haftmann@20453
   578
      {(target)}+
haftmann@20453
   579
        where instance ::= <type constructor> :: <class>
haftmann@20453
   580
haftmann@20453
   581
    code_class <and_list of classes>
haftmann@20453
   582
      {(target) <and-list of class target syntax>}+
haftmann@20453
   583
        where class target syntax ::= <class name> {where {<classop> == <target syntax>}+}?
haftmann@20453
   584
haftmann@25199
   585
code_instance and code_class only are effective to target Haskell.
haftmann@22735
   586
wenzelm@25177
   587
For example usage see src/HOL/ex/Codegenerator.thy and
wenzelm@25177
   588
src/HOL/ex/Codegenerator_Pretty.thy.  A separate tutorial on code
wenzelm@24800
   589
generation from Isabelle/HOL theories is available via "isatool doc
wenzelm@24800
   590
codegen".
haftmann@20188
   591
wenzelm@25129
   592
* Code generator: consts in 'consts_code' Isar commands are now
wenzelm@25129
   593
referred to by usual term syntax (including optional type
wenzelm@25129
   594
annotations).
wenzelm@25129
   595
wenzelm@19254
   596
* Command 'no_translations' removes translation rules from theory
wenzelm@19254
   597
syntax.
wenzelm@19254
   598
wenzelm@19625
   599
* Overloaded definitions are now actually checked for acyclic
wenzelm@19714
   600
dependencies.  The overloading scheme is slightly more general than
wenzelm@19714
   601
that of Haskell98, although Isabelle does not demand an exact
wenzelm@19714
   602
correspondence to type class and instance declarations.
wenzelm@19714
   603
INCOMPATIBILITY, use ``defs (unchecked overloaded)'' to admit more
wenzelm@19714
   604
exotic versions of overloading -- at the discretion of the user!
wenzelm@19711
   605
wenzelm@19711
   606
Polymorphic constants are represented via type arguments, i.e. the
wenzelm@19711
   607
instantiation that matches an instance against the most general
wenzelm@19711
   608
declaration given in the signature.  For example, with the declaration
wenzelm@19711
   609
c :: 'a => 'a => 'a, an instance c :: nat => nat => nat is represented
wenzelm@19711
   610
as c(nat).  Overloading is essentially simultaneous structural
wenzelm@19711
   611
recursion over such type arguments.  Incomplete specification patterns
wenzelm@19714
   612
impose global constraints on all occurrences, e.g. c('a * 'a) on the
wenzelm@19715
   613
LHS means that more general c('a * 'b) will be disallowed on any RHS.
wenzelm@19714
   614
Command 'print_theory' outputs the normalized system of recursive
wenzelm@19714
   615
equations, see section "definitions".
wenzelm@19625
   616
wenzelm@24086
   617
* Configuration options are maintained within the theory or proof
wenzelm@24086
   618
context (with name and type bool/int/string), providing a very simple
wenzelm@24086
   619
interface to a poor-man's version of general context data.  Tools may
wenzelm@24110
   620
declare options in ML (e.g. using Attrib.config_int) and then refer to
wenzelm@24110
   621
these values using Config.get etc.  Users may change options via an
wenzelm@24110
   622
associated attribute of the same name.  This form of context
wenzelm@24110
   623
declaration works particularly well with commands 'declare' or
wenzelm@24110
   624
'using', for example ``declare [[foo = 42]]''.  Thus it has become
wenzelm@24110
   625
very easy to avoid global references, which would not observe Isar
wenzelm@24110
   626
toplevel undo/redo and fail to work with multithreading.
wenzelm@24086
   627
wenzelm@24172
   628
Various global ML references of Pure and HOL have been turned into
wenzelm@24172
   629
configuration options:
wenzelm@24172
   630
wenzelm@24172
   631
  Unify.search_bound		unify_search_bound
wenzelm@24172
   632
  Unify.trace_bound		unify_trace_bound
wenzelm@24172
   633
  Unify.trace_simp		unify_trace_simp
wenzelm@24172
   634
  Unify.trace_types		unify_trace_types
wenzelm@24172
   635
  Simplifier.simp_depth_limit	simp_depth_limit
wenzelm@24172
   636
  Blast.depth_limit		blast_depth_limit
wenzelm@24172
   637
  DatatypeProp.dtK		datatype_distinctness_limit
wenzelm@24172
   638
  fast_arith_neq_limit  	fast_arith_neq_limit
wenzelm@24172
   639
  fast_arith_split_limit	fast_arith_split_limit
wenzelm@24172
   640
wenzelm@24086
   641
* Named collections of theorems may be easily installed as context
wenzelm@24800
   642
data using the functor NamedThmsFun (see also
wenzelm@24086
   643
src/Pure/Tools/named_thms.ML).  The user may add or delete facts via
wenzelm@24110
   644
attributes; there is also a toplevel print command.  This facility is
wenzelm@24110
   645
just a common case of general context data, which is the preferred way
wenzelm@24110
   646
for anything more complex than just a list of facts in canonical
wenzelm@24110
   647
order.
wenzelm@24086
   648
wenzelm@24032
   649
* Isar: command 'declaration' augments a local theory by generic
wenzelm@24032
   650
declaration functions written in ML.  This enables arbitrary content
wenzelm@24032
   651
being added to the context, depending on a morphism that tells the
wenzelm@24032
   652
difference of the original declaration context wrt. the application
wenzelm@24032
   653
context encountered later on.
wenzelm@24032
   654
wenzelm@24032
   655
* Isar: proper interfaces for simplification procedures.  Command
wenzelm@24032
   656
'simproc_setup' declares named simprocs (with match patterns, and body
wenzelm@24032
   657
text in ML).  Attribute "simproc" adds/deletes simprocs in the current
wenzelm@24032
   658
context.  ML antiquotation @{simproc name} retrieves named simprocs.
wenzelm@24032
   659
wenzelm@24032
   660
* Isar: an extra pair of brackets around attribute declarations
wenzelm@24032
   661
abbreviates a theorem reference involving an internal dummy fact,
wenzelm@24032
   662
which will be ignored later --- only the effect of the attribute on
wenzelm@24032
   663
the background context will persist.  This form of in-place
wenzelm@24032
   664
declarations is particularly useful with commands like 'declare' and
wenzelm@24032
   665
'using', for example ``have A using [[simproc a]] by simp''.
wenzelm@24032
   666
wenzelm@23369
   667
* Isar: method "assumption" (and implicit closing of subproofs) now
wenzelm@23369
   668
takes simple non-atomic goal assumptions into account: after applying
wenzelm@23369
   669
an assumption as a rule the resulting subgoals are solved by atomic
wenzelm@23369
   670
assumption steps.  This is particularly useful to finish 'obtain'
wenzelm@23369
   671
goals, such as "!!x. (!!x. P x ==> thesis) ==> P x ==> thesis",
wenzelm@23369
   672
without referring to the original premise "!!x. P x ==> thesis" in the
wenzelm@23369
   673
Isar proof context.  POTENTIAL INCOMPATIBILITY: method "assumption" is
wenzelm@23369
   674
more permissive.
wenzelm@23369
   675
wenzelm@23369
   676
* Isar: implicit use of prems from the Isar proof context is
wenzelm@23369
   677
considered a legacy feature.  Common applications like ``have A .''
wenzelm@23369
   678
may be replaced by ``have A by fact'' or ``note `A`''.  In general,
wenzelm@23369
   679
referencing facts explicitly here improves readability and
wenzelm@23369
   680
maintainability of proof texts.
wenzelm@23369
   681
wenzelm@17865
   682
* Isar: improper proof element 'guess' is like 'obtain', but derives
wenzelm@17865
   683
the obtained context from the course of reasoning!  For example:
wenzelm@17865
   684
wenzelm@17865
   685
  assume "EX x y. A x & B y"   -- "any previous fact"
wenzelm@17865
   686
  then guess x and y by clarify
wenzelm@17865
   687
wenzelm@17865
   688
This technique is potentially adventurous, depending on the facts and
wenzelm@17865
   689
proof tools being involved here.
wenzelm@17865
   690
wenzelm@18020
   691
* Isar: known facts from the proof context may be specified as literal
wenzelm@18020
   692
propositions, using ASCII back-quote syntax.  This works wherever
wenzelm@18020
   693
named facts used to be allowed so far, in proof commands, proof
wenzelm@18020
   694
methods, attributes etc.  Literal facts are retrieved from the context
wenzelm@18020
   695
according to unification of type and term parameters.  For example,
wenzelm@18020
   696
provided that "A" and "A ==> B" and "!!x. P x ==> Q x" are known
wenzelm@18020
   697
theorems in the current context, then these are valid literal facts:
wenzelm@18020
   698
`A` and `A ==> B` and `!!x. P x ==> Q x" as well as `P a ==> Q a` etc.
wenzelm@18020
   699
wenzelm@18020
   700
There is also a proof method "fact" which does the same composition
wenzelm@18044
   701
for explicit goal states, e.g. the following proof texts coincide with
wenzelm@18044
   702
certain special cases of literal facts:
wenzelm@18020
   703
wenzelm@18020
   704
  have "A" by fact                 ==  note `A`
wenzelm@18020
   705
  have "A ==> B" by fact           ==  note `A ==> B`
wenzelm@18020
   706
  have "!!x. P x ==> Q x" by fact  ==  note `!!x. P x ==> Q x`
wenzelm@18020
   707
  have "P a ==> Q a" by fact       ==  note `P a ==> Q a`
wenzelm@18020
   708
wenzelm@20118
   709
* Isar: ":" (colon) is no longer a symbolic identifier character in
wenzelm@20118
   710
outer syntax.  Thus symbolic identifiers may be used without
wenzelm@20118
   711
additional white space in declarations like this: ``assume *: A''.
wenzelm@20118
   712
wenzelm@20013
   713
* Isar: 'print_facts' prints all local facts of the current context,
wenzelm@20013
   714
both named and unnamed ones.
wenzelm@20013
   715
wenzelm@18308
   716
* Isar: 'def' now admits simultaneous definitions, e.g.:
wenzelm@18308
   717
wenzelm@18308
   718
  def x == "t" and y == "u"
wenzelm@18308
   719
wenzelm@18540
   720
* Isar: added command 'unfolding', which is structurally similar to
wenzelm@18540
   721
'using', but affects both the goal state and facts by unfolding given
wenzelm@18815
   722
rewrite rules.  Thus many occurrences of the 'unfold' method or
wenzelm@18540
   723
'unfolded' attribute may be replaced by first-class proof text.
wenzelm@18540
   724
wenzelm@18815
   725
* Isar: methods 'unfold' / 'fold', attributes 'unfolded' / 'folded',
wenzelm@18815
   726
and command 'unfolding' now all support object-level equalities
wenzelm@18815
   727
(potentially conditional).  The underlying notion of rewrite rule is
wenzelm@18815
   728
analogous to the 'rule_format' attribute, but *not* that of the
wenzelm@18815
   729
Simplifier (which is usually more generous).
wenzelm@18815
   730
kleing@24238
   731
* Isar: the new attribute [rotated n] (default n = 1) rotates the
kleing@24238
   732
premises of a theorem by n. Useful in conjunction with drule.
kleing@24238
   733
wenzelm@19220
   734
* Isar: the goal restriction operator [N] (default N = 1) evaluates a
wenzelm@19220
   735
method expression within a sandbox consisting of the first N
wenzelm@19240
   736
sub-goals, which need to exist.  For example, ``simp_all [3]''
wenzelm@19240
   737
simplifies the first three sub-goals, while (rule foo, simp_all)[]
wenzelm@19240
   738
simplifies all new goals that emerge from applying rule foo to the
wenzelm@19240
   739
originally first one.
wenzelm@19220
   740
wenzelm@19814
   741
* Isar: schematic goals are no longer restricted to higher-order
wenzelm@19814
   742
patterns; e.g. ``lemma "?P(?x)" by (rule TrueI)'' now works as
wenzelm@19814
   743
expected.
wenzelm@19814
   744
wenzelm@18901
   745
* Isar: the conclusion of a long theorem statement is now either
wenzelm@18901
   746
'shows' (a simultaneous conjunction, as before), or 'obtains'
wenzelm@18901
   747
(essentially a disjunction of cases with local parameters and
wenzelm@18901
   748
assumptions).  The latter allows to express general elimination rules
wenzelm@18910
   749
adequately; in this notation common elimination rules look like this:
wenzelm@18901
   750
wenzelm@18901
   751
  lemma exE:    -- "EX x. P x ==> (!!x. P x ==> thesis) ==> thesis"
wenzelm@18901
   752
    assumes "EX x. P x"
wenzelm@18901
   753
    obtains x where "P x"
wenzelm@18901
   754
wenzelm@18901
   755
  lemma conjE:  -- "A & B ==> (A ==> B ==> thesis) ==> thesis"
wenzelm@18901
   756
    assumes "A & B"
wenzelm@18901
   757
    obtains A and B
wenzelm@18901
   758
wenzelm@18901
   759
  lemma disjE:  -- "A | B ==> (A ==> thesis) ==> (B ==> thesis) ==> thesis"
wenzelm@18901
   760
    assumes "A | B"
wenzelm@18901
   761
    obtains
wenzelm@18901
   762
      A
wenzelm@18901
   763
    | B
wenzelm@18901
   764
wenzelm@18910
   765
The subsequent classical rules even refer to the formal "thesis"
wenzelm@18901
   766
explicitly:
wenzelm@18901
   767
wenzelm@18901
   768
  lemma classical:     -- "(~ thesis ==> thesis) ==> thesis"
wenzelm@18901
   769
    obtains "~ thesis"
wenzelm@18901
   770
wenzelm@18910
   771
  lemma Peirce's_Law:  -- "((thesis ==> something) ==> thesis) ==> thesis"
wenzelm@18910
   772
    obtains "thesis ==> something"
wenzelm@18901
   773
wenzelm@18901
   774
The actual proof of an 'obtains' statement is analogous to that of the
wenzelm@18910
   775
Isar proof element 'obtain', only that there may be several cases.
wenzelm@18910
   776
Optional case names may be specified in parentheses; these will be
wenzelm@18910
   777
available both in the present proof and as annotations in the
wenzelm@18910
   778
resulting rule, for later use with the 'cases' method (cf. attribute
wenzelm@18910
   779
case_names).
wenzelm@18901
   780
wenzelm@21447
   781
* Isar: the assumptions of a long theorem statement are available as
wenzelm@21447
   782
"assms" fact in the proof context.  This is more appropriate than the
wenzelm@21447
   783
(historical) "prems", which refers to all assumptions of the current
wenzelm@21447
   784
context, including those from the target locale, proof body etc.
wenzelm@21447
   785
wenzelm@19263
   786
* Isar: 'print_statement' prints theorems from the current theory or
wenzelm@19263
   787
proof context in long statement form, according to the syntax of a
wenzelm@19263
   788
top-level lemma.
wenzelm@19263
   789
wenzelm@18901
   790
* Isar: 'obtain' takes an optional case name for the local context
wenzelm@18901
   791
introduction rule (default "that").
wenzelm@18901
   792
wenzelm@19587
   793
* Isar: removed obsolete 'concl is' patterns.  INCOMPATIBILITY, use
wenzelm@19587
   794
explicit (is "_ ==> ?foo") in the rare cases where this still happens
wenzelm@19587
   795
to occur.
wenzelm@19587
   796
wenzelm@19682
   797
* Pure: syntax "CONST name" produces a fully internalized constant
wenzelm@19682
   798
according to the current context.  This is particularly useful for
wenzelm@19682
   799
syntax translations that should refer to internal constant
wenzelm@19682
   800
representations independently of name spaces.
wenzelm@19682
   801
wenzelm@21537
   802
* Pure: syntax constant for foo (binder "FOO ") is called "foo_binder"
wenzelm@21537
   803
instead of "FOO ". This allows multiple binder declarations to coexist
wenzelm@21537
   804
in the same context.  INCOMPATIBILITY.
wenzelm@21537
   805
wenzelm@21209
   806
* Isar/locales: 'notation' provides a robust interface to the 'syntax'
wenzelm@21209
   807
primitive that also works in a locale context (both for constants and
wenzelm@24950
   808
fixed variables). Type declaration and internal syntactic representation
wenzelm@24950
   809
of given constants retrieved from the context. Likewise, the
wenzelm@24950
   810
'no_notation' command allows to remove given syntax annotations from the
wenzelm@24950
   811
current context.
wenzelm@19682
   812
wenzelm@19665
   813
* Isar/locales: new derived specification elements 'axiomatization',
wenzelm@19665
   814
'definition', 'abbreviation', which support type-inference, admit
wenzelm@19083
   815
object-level specifications (equality, equivalence).  See also the
wenzelm@19083
   816
isar-ref manual.  Examples:
wenzelm@19081
   817
wenzelm@19665
   818
  axiomatization
wenzelm@21595
   819
    eq  (infix "===" 50) where
wenzelm@21595
   820
    eq_refl: "x === x" and eq_subst: "x === y ==> P x ==> P y"
wenzelm@21595
   821
wenzelm@21595
   822
  definition "f x y = x + y + 1"
wenzelm@21595
   823
  definition g where "g x = f x x"
wenzelm@19081
   824
wenzelm@19363
   825
  abbreviation
wenzelm@21595
   826
    neq  (infix "=!=" 50) where
wenzelm@19363
   827
    "x =!= y == ~ (x === y)"
wenzelm@19081
   828
wenzelm@19083
   829
These specifications may be also used in a locale context.  Then the
wenzelm@19083
   830
constants being introduced depend on certain fixed parameters, and the
wenzelm@19083
   831
constant name is qualified by the locale base name.  An internal
wenzelm@19083
   832
abbreviation takes care for convenient input and output, making the
wenzelm@19088
   833
parameters implicit and using the original short name.  See also
wenzelm@25177
   834
src/HOL/ex/Abstract_NAT.thy for an example of deriving polymorphic
wenzelm@19083
   835
entities from a monomorphic theory.
wenzelm@19083
   836
wenzelm@19083
   837
Presently, abbreviations are only available 'in' a target locale, but
wenzelm@19363
   838
not inherited by general import expressions.  Also note that
wenzelm@19363
   839
'abbreviation' may be used as a type-safe replacement for 'syntax' +
wenzelm@24735
   840
'translations' in common applications.  The "no_abbrevs" print mode
wenzelm@24735
   841
prevents folding of abbreviations in term output.
wenzelm@19084
   842
wenzelm@19682
   843
Concrete syntax is attached to specified constants in internal form,
wenzelm@19682
   844
independently of name spaces.  The parse tree representation is
wenzelm@21209
   845
slightly different -- use 'notation' instead of raw 'syntax', and
wenzelm@19682
   846
'translations' with explicit "CONST" markup to accommodate this.
wenzelm@19665
   847
wenzelm@24800
   848
* Pure/Isar: unified syntax for new-style specification mechanisms
wenzelm@24800
   849
(e.g.  'definition', 'abbreviation', or 'inductive' in HOL) admits
wenzelm@24800
   850
full type inference and dummy patterns ("_").  For example:
wenzelm@24735
   851
wenzelm@24735
   852
  definition "K x _ = x"
wenzelm@24735
   853
wenzelm@24738
   854
  inductive conj for A B
wenzelm@24738
   855
  where "A ==> B ==> conj A B"
wenzelm@24738
   856
wenzelm@21735
   857
* Pure: command 'print_abbrevs' prints all constant abbreviations of
wenzelm@21735
   858
the current context.  Print mode "no_abbrevs" prevents inversion of
wenzelm@21735
   859
abbreviations on output.
wenzelm@21735
   860
wenzelm@24800
   861
* Isar/locales: improved parameter handling: use of locales "var" and
wenzelm@24800
   862
"struct" no longer necessary; - parameter renamings are no longer
wenzelm@24800
   863
required to be injective.  For example, this allows to define
wenzelm@24800
   864
endomorphisms as locale endom = homom mult mult h.
ballarin@19783
   865
ballarin@19931
   866
* Isar/locales: changed the way locales with predicates are defined.
ballarin@19931
   867
Instead of accumulating the specification, the imported expression is
wenzelm@22126
   868
now an interpretation.  INCOMPATIBILITY: different normal form of
wenzelm@22126
   869
locale expressions.  In particular, in interpretations of locales with
wenzelm@22126
   870
predicates, goals repesenting already interpreted fragments are not
wenzelm@22126
   871
removed automatically.  Use methods `intro_locales' and
wenzelm@22126
   872
`unfold_locales'; see below.
wenzelm@22126
   873
wenzelm@22126
   874
* Isar/locales: new methods `intro_locales' and `unfold_locales'
wenzelm@22126
   875
provide backward reasoning on locales predicates.  The methods are
wenzelm@22126
   876
aware of interpretations and discharge corresponding goals.
wenzelm@22126
   877
`intro_locales' is less aggressive then `unfold_locales' and does not
wenzelm@22126
   878
unfold predicates to assumptions.
ballarin@19931
   879
ballarin@19931
   880
* Isar/locales: the order in which locale fragments are accumulated
wenzelm@22126
   881
has changed.  This enables to override declarations from fragments due
wenzelm@22126
   882
to interpretations -- for example, unwanted simp rules.
ballarin@19931
   883
ballarin@23920
   884
* Isar/locales: interpretation in theories and proof contexts has been
ballarin@23920
   885
extended.  One may now specify (and prove) equations, which are
ballarin@23920
   886
unfolded in interpreted theorems.  This is useful for replacing
ballarin@23920
   887
defined concepts (constants depending on locale parameters) by
ballarin@23920
   888
concepts already existing in the target context.  Example:
ballarin@23920
   889
ballarin@23920
   890
  interpretation partial_order ["op <= :: [int, int] => bool"]
ballarin@23920
   891
    where "partial_order.less (op <=) (x::int) y = (x < y)"
ballarin@23920
   892
wenzelm@24800
   893
Typically, the constant `partial_order.less' is created by a
wenzelm@24800
   894
definition specification element in the context of locale
wenzelm@24800
   895
partial_order.
wenzelm@24800
   896
wenzelm@24859
   897
* Method "induct": improved internal context management to support
wenzelm@24800
   898
local fixes and defines on-the-fly. Thus explicit meta-level
wenzelm@24800
   899
connectives !!  and ==> are rarely required anymore in inductive goals
wenzelm@24800
   900
(using object-logic connectives for this purpose has been long
wenzelm@24800
   901
obsolete anyway). Common proof patterns are explained in
wenzelm@25177
   902
src/HOL/Induct/Common_Patterns.thy, see also
wenzelm@25177
   903
src/HOL/Isar_examples/Puzzle.thy and src/HOL/Lambda for realistic
wenzelm@25177
   904
examples.
wenzelm@24606
   905
wenzelm@24859
   906
* Method "induct": improved handling of simultaneous goals. Instead of
wenzelm@24606
   907
introducing object-level conjunction, the statement is now split into
wenzelm@24606
   908
several conclusions, while the corresponding symbolic cases are nested
wenzelm@24606
   909
accordingly. INCOMPATIBILITY, proofs need to be structured explicitly,
wenzelm@25177
   910
see src/HOL/Induct/Common_Patterns.thy, for example.
wenzelm@24606
   911
wenzelm@24859
   912
* Method "induct": mutual induction rules are now specified as a list
wenzelm@24800
   913
of rule sharing the same induction cases. HOL packages usually provide
wenzelm@24606
   914
foo_bar.inducts for mutually defined items foo and bar (e.g. inductive
wenzelm@24859
   915
predicates/sets or datatypes). INCOMPATIBILITY, users need to specify
wenzelm@24859
   916
mutual induction rules differently, i.e. like this:
wenzelm@18506
   917
wenzelm@18506
   918
  (induct rule: foo_bar.inducts)
wenzelm@18506
   919
  (induct set: foo bar)
wenzelm@24859
   920
  (induct pred: foo bar)
wenzelm@18506
   921
  (induct type: foo bar)
wenzelm@18506
   922
wenzelm@18506
   923
The ML function ProjectRule.projections turns old-style rules into the
wenzelm@18506
   924
new format.
wenzelm@18506
   925
wenzelm@24859
   926
* Method "coinduct": dual of induction, see
wenzelm@18399
   927
src/HOL/Library/Coinductive_List.thy for various examples.
wenzelm@18399
   928
wenzelm@24859
   929
* Method "cases", "induct", "coinduct": the ``(open)'' option is
wenzelm@24859
   930
considered a legacy feature.
wenzelm@24859
   931
wenzelm@20919
   932
* Attribute "symmetric" produces result with standardized schematic
wenzelm@20919
   933
variables (index 0).  Potential INCOMPATIBILITY.
wenzelm@20919
   934
wenzelm@22126
   935
* Simplifier: by default the simplifier trace only shows top level
wenzelm@22126
   936
rewrites now. That is, trace_simp_depth_limit is set to 1 by
wenzelm@22126
   937
default. Thus there is less danger of being flooded by the trace. The
wenzelm@22126
   938
trace indicates where parts have been suppressed.
nipkow@18674
   939
  
wenzelm@18536
   940
* Provers/classical: removed obsolete classical version of elim_format
wenzelm@18536
   941
attribute; classical elim/dest rules are now treated uniformly when
wenzelm@18536
   942
manipulating the claset.
wenzelm@18536
   943
wenzelm@18694
   944
* Provers/classical: stricter checks to ensure that supplied intro,
wenzelm@18694
   945
dest and elim rules are well-formed; dest and elim rules must have at
wenzelm@18694
   946
least one premise.
wenzelm@18694
   947
wenzelm@18694
   948
* Provers/classical: attributes dest/elim/intro take an optional
wenzelm@18695
   949
weight argument for the rule (just as the Pure versions).  Weights are
wenzelm@18696
   950
ignored by automated tools, but determine the search order of single
wenzelm@18694
   951
rule steps.
paulson@18557
   952
wenzelm@18536
   953
* Syntax: input syntax now supports dummy variable binding "%_. b",
wenzelm@18536
   954
where the body does not mention the bound variable.  Note that dummy
wenzelm@18536
   955
patterns implicitly depend on their context of bounds, which makes
wenzelm@18536
   956
"{_. _}" match any set comprehension as expected.  Potential
wenzelm@18536
   957
INCOMPATIBILITY -- parse translations need to cope with syntactic
wenzelm@18536
   958
constant "_idtdummy" in the binding position.
wenzelm@18536
   959
wenzelm@18536
   960
* Syntax: removed obsolete syntactic constant "_K" and its associated
wenzelm@18536
   961
parse translation.  INCOMPATIBILITY -- use dummy abstraction instead,
wenzelm@18536
   962
for example "A -> B" => "Pi A (%_. B)".
wenzelm@17779
   963
wenzelm@20582
   964
* Pure: 'class_deps' command visualizes the subclass relation, using
wenzelm@20582
   965
the graph browser tool.
wenzelm@20582
   966
wenzelm@24800
   967
* Pure: 'print_theory' now suppresses certain internal declarations by
wenzelm@24800
   968
default; use '!' option for full details.
wenzelm@20620
   969
wenzelm@17865
   970
nipkow@17806
   971
*** HOL ***
nipkow@17806
   972
wenzelm@25129
   973
* Method "metis" proves goals by applying the Metis general-purpose
wenzelm@25129
   974
resolution prover (see also http://gilith.com/software/metis/).
wenzelm@25129
   975
Examples are in the directory MetisExamples.  WARNING: the
wenzelm@25129
   976
Isabelle/HOL-Metis integration does not yet work properly with
wenzelm@25129
   977
multi-threading.
wenzelm@25129
   978
  
wenzelm@25129
   979
* Command 'sledgehammer' invokes external automatic theorem provers as
wenzelm@25129
   980
background processes.  It generates calls to the "metis" method if
wenzelm@25129
   981
successful. These can be pasted into the proof.  Users do not have to
wenzelm@25129
   982
wait for the automatic provers to return.  WARNING: does not really
wenzelm@25129
   983
work with multi-threading.
wenzelm@25129
   984
wenzelm@24804
   985
* New "auto_quickcheck" feature tests outermost goal statements for
wenzelm@24804
   986
potential counter-examples.  Controlled by ML references
wenzelm@24804
   987
auto_quickcheck (default true) and auto_quickcheck_time_limit (default
wenzelm@25129
   988
5000 milliseconds).  Fails silently if statements is outside of
wenzelm@25129
   989
executable fragment, or any other codgenerator problem occurs.
wenzelm@24804
   990
haftmann@25184
   991
* New constant "undefined" with axiom "undefined x = undefined".
haftmann@25184
   992
haftmann@25184
   993
* Added class "HOL.eq", allowing for code generation with polymorphic
haftmann@25184
   994
equality.
haftmann@25184
   995
haftmann@25184
   996
* Some renaming of class constants due to canonical name prefixing in
haftmann@25184
   997
the new 'class' package:
haftmann@25184
   998
haftmann@25184
   999
    HOL.abs ~> HOL.abs_class.abs
haftmann@25184
  1000
    HOL.divide ~> HOL.divide_class.divide
haftmann@25184
  1001
    0 ~> HOL.zero_class.zero
haftmann@25184
  1002
    1 ~> HOL.one_class.one
haftmann@25184
  1003
    op + ~> HOL.plus_class.plus
haftmann@25184
  1004
    op - ~> HOL.minus_class.minus
haftmann@25184
  1005
    uminus ~> HOL.minus_class.uminus
haftmann@25184
  1006
    op * ~> HOL.times_class.times
haftmann@25184
  1007
    op < ~> HOL.ord_class.less
haftmann@25184
  1008
    op <= > HOL.ord_class.less_eq
haftmann@25184
  1009
    Nat.power ~> Power.power_class.power
haftmann@25184
  1010
    Nat.size ~> Nat.size_class.size
haftmann@25184
  1011
    Numeral.number_of ~> Numeral.number_class.number_of
haftmann@25184
  1012
    FixedPoint.Inf ~> Lattices.complete_lattice_class.Inf
haftmann@25184
  1013
    FixedPoint.Sup ~> Lattices.complete_lattice_class.Sup
haftmann@25184
  1014
    Orderings.min ~> Orderings.ord_class.min
haftmann@25184
  1015
    Orderings.max ~> Orderings.ord_class.max
haftmann@25184
  1016
    Divides.op div ~> Divides.div_class.div
haftmann@25184
  1017
    Divides.op mod ~> Divides.div_class.mod
haftmann@25184
  1018
    Divides.op dvd ~> Divides.div_class.dvd
haftmann@25184
  1019
haftmann@25184
  1020
INCOMPATIBILITY.  Adaptions may be required in the following cases:
haftmann@25184
  1021
haftmann@25184
  1022
a) User-defined constants using any of the names "plus", "minus",
haftmann@25184
  1023
"times", "less" or "less_eq". The standard syntax translations for
haftmann@25184
  1024
"+", "-" and "*" may go wrong.  INCOMPATIBILITY: use more specific
haftmann@25184
  1025
names.
haftmann@25184
  1026
haftmann@25184
  1027
b) Variables named "plus", "minus", "times", "less", "less_eq"
haftmann@25184
  1028
INCOMPATIBILITY: use more specific names.
haftmann@25184
  1029
haftmann@25184
  1030
c) Permutative equations (e.g. "a + b = b + a")
haftmann@25184
  1031
Since the change of names also changes the order of terms, permutative
haftmann@25184
  1032
rewrite rules may get applied in a different order. Experience shows
haftmann@25184
  1033
that this is rarely the case (only two adaptions in the whole Isabelle
haftmann@25184
  1034
distribution).  INCOMPATIBILITY: rewrite proofs
haftmann@25184
  1035
haftmann@25184
  1036
d) ML code directly refering to constant names
haftmann@25184
  1037
This in general only affects hand-written proof tactics, simprocs and
haftmann@25184
  1038
so on.  INCOMPATIBILITY: grep your sourcecode and replace names.
haftmann@25184
  1039
Consider using @{const_name} antiquotation.
haftmann@25184
  1040
haftmann@25184
  1041
* New class "default" with associated constant "default".
haftmann@25184
  1042
haftmann@25184
  1043
* Function "sgn" is now overloaded and available on int, real, complex
haftmann@25184
  1044
(and other numeric types), using class "sgn".  Two possible defs of
haftmann@25184
  1045
sgn are given as equational assumptions in the classes sgn_if and
haftmann@25184
  1046
sgn_div_norm; ordered_idom now also inherits from sgn_if.
haftmann@25184
  1047
INCOMPATIBILITY.
haftmann@25184
  1048
haftmann@25184
  1049
* Locale "partial_order" now unified with class "order" (cf. theory
haftmann@25184
  1050
Orderings), added parameter "less".  INCOMPATIBILITY.
haftmann@25184
  1051
haftmann@25184
  1052
* Renamings in classes "order" and "linorder": facts "refl", "trans" and
haftmann@25184
  1053
"cases" to "order_refl", "order_trans" and "linorder_cases", to avoid
haftmann@25184
  1054
clashes with HOL "refl" and "trans".  INCOMPATIBILITY.
haftmann@25184
  1055
haftmann@25184
  1056
* Classes "order" and "linorder": potential INCOMPATIBILITY due to
haftmann@25184
  1057
changed order of proof goals in instance proofs.
haftmann@25184
  1058
haftmann@25184
  1059
* The transitivity reasoner for partial and linear orders is set up
haftmann@25184
  1060
for classes "order" and "linorder".  Instances of the reasoner are available
haftmann@25184
  1061
in all contexts importing or interpreting the corresponding locales.
haftmann@25184
  1062
Method "order" invokes the reasoner separately; the reasoner
haftmann@25184
  1063
is also integrated with the Simplifier as a solver.  Diagnostic
haftmann@25184
  1064
command 'print_orders' shows the available instances of the reasoner
haftmann@25184
  1065
in the current context.
haftmann@25184
  1066
haftmann@25184
  1067
* Localized monotonicity predicate in theory "Orderings"; integrated
haftmann@25184
  1068
lemmas max_of_mono and min_of_mono with this predicate.
haftmann@25184
  1069
INCOMPATIBILITY.
haftmann@25184
  1070
haftmann@25184
  1071
* Formulation of theorem "dense" changed slightly due to integration
haftmann@25184
  1072
with new class dense_linear_order.
haftmann@25184
  1073
haftmann@25184
  1074
* Uniform lattice theory development in HOL.
haftmann@25184
  1075
haftmann@25184
  1076
    constants "meet" and "join" now named "inf" and "sup"
haftmann@25184
  1077
    constant "Meet" now named "Inf"
haftmann@25184
  1078
haftmann@25184
  1079
    classes "meet_semilorder" and "join_semilorder" now named
haftmann@25184
  1080
      "lower_semilattice" and "upper_semilattice"
haftmann@25184
  1081
    class "lorder" now named "lattice"
haftmann@25184
  1082
    class "comp_lat" now named "complete_lattice"
haftmann@25184
  1083
haftmann@25184
  1084
    Instantiation of lattice classes allows explicit definitions
haftmann@25184
  1085
    for "inf" and "sup" operations (or "Inf" and "Sup" for complete lattices).
haftmann@25184
  1086
haftmann@25184
  1087
  INCOMPATIBILITY.  Theorem renames:
haftmann@25184
  1088
haftmann@25184
  1089
    meet_left_le            ~> inf_le1
haftmann@25184
  1090
    meet_right_le           ~> inf_le2
haftmann@25184
  1091
    join_left_le            ~> sup_ge1
haftmann@25184
  1092
    join_right_le           ~> sup_ge2
haftmann@25184
  1093
    meet_join_le            ~> inf_sup_ord
haftmann@25184
  1094
    le_meetI                ~> le_infI
haftmann@25184
  1095
    join_leI                ~> le_supI
haftmann@25184
  1096
    le_meet                 ~> le_inf_iff
haftmann@25184
  1097
    le_join                 ~> ge_sup_conv
haftmann@25184
  1098
    meet_idempotent         ~> inf_idem
haftmann@25184
  1099
    join_idempotent         ~> sup_idem
haftmann@25184
  1100
    meet_comm               ~> inf_commute
haftmann@25184
  1101
    join_comm               ~> sup_commute
haftmann@25184
  1102
    meet_leI1               ~> le_infI1
haftmann@25184
  1103
    meet_leI2               ~> le_infI2
haftmann@25184
  1104
    le_joinI1               ~> le_supI1
haftmann@25184
  1105
    le_joinI2               ~> le_supI2
haftmann@25184
  1106
    meet_assoc              ~> inf_assoc
haftmann@25184
  1107
    join_assoc              ~> sup_assoc
haftmann@25184
  1108
    meet_left_comm          ~> inf_left_commute
haftmann@25184
  1109
    meet_left_idempotent    ~> inf_left_idem
haftmann@25184
  1110
    join_left_comm          ~> sup_left_commute
haftmann@25184
  1111
    join_left_idempotent    ~> sup_left_idem
haftmann@25184
  1112
    meet_aci                ~> inf_aci
haftmann@25184
  1113
    join_aci                ~> sup_aci
haftmann@25184
  1114
    le_def_meet             ~> le_iff_inf
haftmann@25184
  1115
    le_def_join             ~> le_iff_sup
haftmann@25184
  1116
    join_absorp2            ~> sup_absorb2
haftmann@25184
  1117
    join_absorp1            ~> sup_absorb1
haftmann@25184
  1118
    meet_absorp1            ~> inf_absorb1
haftmann@25184
  1119
    meet_absorp2            ~> inf_absorb2
haftmann@25184
  1120
    meet_join_absorp        ~> inf_sup_absorb
haftmann@25184
  1121
    join_meet_absorp        ~> sup_inf_absorb
haftmann@25184
  1122
    distrib_join_le         ~> distrib_sup_le
haftmann@25184
  1123
    distrib_meet_le         ~> distrib_inf_le
haftmann@25184
  1124
haftmann@25184
  1125
    add_meet_distrib_left   ~> add_inf_distrib_left
haftmann@25184
  1126
    add_join_distrib_left   ~> add_sup_distrib_left
haftmann@25184
  1127
    is_join_neg_meet        ~> is_join_neg_inf
haftmann@25184
  1128
    is_meet_neg_join        ~> is_meet_neg_sup
haftmann@25184
  1129
    add_meet_distrib_right  ~> add_inf_distrib_right
haftmann@25184
  1130
    add_join_distrib_right  ~> add_sup_distrib_right
haftmann@25184
  1131
    add_meet_join_distribs  ~> add_sup_inf_distribs
haftmann@25184
  1132
    join_eq_neg_meet        ~> sup_eq_neg_inf
haftmann@25184
  1133
    meet_eq_neg_join        ~> inf_eq_neg_sup
haftmann@25184
  1134
    add_eq_meet_join        ~> add_eq_inf_sup
haftmann@25184
  1135
    meet_0_imp_0            ~> inf_0_imp_0
haftmann@25184
  1136
    join_0_imp_0            ~> sup_0_imp_0
haftmann@25184
  1137
    meet_0_eq_0             ~> inf_0_eq_0
haftmann@25184
  1138
    join_0_eq_0             ~> sup_0_eq_0
haftmann@25184
  1139
    neg_meet_eq_join        ~> neg_inf_eq_sup
haftmann@25184
  1140
    neg_join_eq_meet        ~> neg_sup_eq_inf
haftmann@25184
  1141
    join_eq_if              ~> sup_eq_if
haftmann@25184
  1142
haftmann@25184
  1143
    mono_meet               ~> mono_inf
haftmann@25184
  1144
    mono_join               ~> mono_sup
haftmann@25184
  1145
    meet_bool_eq            ~> inf_bool_eq
haftmann@25184
  1146
    join_bool_eq            ~> sup_bool_eq
haftmann@25184
  1147
    meet_fun_eq             ~> inf_fun_eq
haftmann@25184
  1148
    join_fun_eq             ~> sup_fun_eq
haftmann@25184
  1149
    meet_set_eq             ~> inf_set_eq
haftmann@25184
  1150
    join_set_eq             ~> sup_set_eq
haftmann@25184
  1151
    meet1_iff               ~> inf1_iff
haftmann@25184
  1152
    meet2_iff               ~> inf2_iff
haftmann@25184
  1153
    meet1I                  ~> inf1I
haftmann@25184
  1154
    meet2I                  ~> inf2I
haftmann@25184
  1155
    meet1D1                 ~> inf1D1
haftmann@25184
  1156
    meet2D1                 ~> inf2D1
haftmann@25184
  1157
    meet1D2                 ~> inf1D2
haftmann@25184
  1158
    meet2D2                 ~> inf2D2
haftmann@25184
  1159
    meet1E                  ~> inf1E
haftmann@25184
  1160
    meet2E                  ~> inf2E
haftmann@25184
  1161
    join1_iff               ~> sup1_iff
haftmann@25184
  1162
    join2_iff               ~> sup2_iff
haftmann@25184
  1163
    join1I1                 ~> sup1I1
haftmann@25184
  1164
    join2I1                 ~> sup2I1
haftmann@25184
  1165
    join1I1                 ~> sup1I1
haftmann@25184
  1166
    join2I2                 ~> sup1I2
haftmann@25184
  1167
    join1CI                 ~> sup1CI
haftmann@25184
  1168
    join2CI                 ~> sup2CI
haftmann@25184
  1169
    join1E                  ~> sup1E
haftmann@25184
  1170
    join2E                  ~> sup2E
haftmann@25184
  1171
haftmann@25184
  1172
    is_meet_Meet            ~> is_meet_Inf
haftmann@25184
  1173
    Meet_bool_def           ~> Inf_bool_def
haftmann@25184
  1174
    Meet_fun_def            ~> Inf_fun_def
haftmann@25184
  1175
    Meet_greatest           ~> Inf_greatest
haftmann@25184
  1176
    Meet_lower              ~> Inf_lower
haftmann@25184
  1177
    Meet_set_def            ~> Inf_set_def
haftmann@25184
  1178
haftmann@25184
  1179
    Sup_def                 ~> Sup_Inf
haftmann@25184
  1180
    Sup_bool_eq             ~> Sup_bool_def
haftmann@25184
  1181
    Sup_fun_eq              ~> Sup_fun_def
haftmann@25184
  1182
    Sup_set_eq              ~> Sup_set_def
haftmann@25184
  1183
haftmann@25184
  1184
    listsp_meetI            ~> listsp_infI
haftmann@25184
  1185
    listsp_meet_eq          ~> listsp_inf_eq
haftmann@25184
  1186
haftmann@25184
  1187
    meet_min                ~> inf_min
haftmann@25184
  1188
    join_max                ~> sup_max
haftmann@25184
  1189
haftmann@25184
  1190
* Added syntactic class "size"; overloaded constant "size" now has
haftmann@25184
  1191
type "'a::size ==> bool"
haftmann@25184
  1192
wenzelm@24800
  1193
* Internal reorganisation of `size' of datatypes: size theorems
wenzelm@24800
  1194
"foo.size" are no longer subsumed by "foo.simps" (but are still
wenzelm@24800
  1195
simplification rules by default!); theorems "prod.size" now named
haftmann@25184
  1196
"*.size".
haftmann@25184
  1197
haftmann@25184
  1198
* Class "div" now inherits from class "times" rather than "type".
haftmann@25184
  1199
INCOMPATIBILITY.
wenzelm@24800
  1200
wenzelm@24800
  1201
* HOL/Finite_Set: "name-space" locales Lattice, Distrib_lattice,
wenzelm@24800
  1202
Linorder etc.  have disappeared; operations defined in terms of
wenzelm@24800
  1203
fold_set now are named Inf_fin, Sup_fin.  INCOMPATIBILITY.
wenzelm@24800
  1204
wenzelm@25129
  1205
* HOL/Nat: neq0_conv no longer declared as iff.  INCOMPATIBILITY.
wenzelm@25129
  1206
wenzelm@24800
  1207
* HOL-Word: New extensive library and type for generic, fixed size
wenzelm@24800
  1208
machine words, with arithemtic, bit-wise, shifting and rotating
wenzelm@24800
  1209
operations, reflection into int, nat, and bool lists, automation for
wenzelm@24800
  1210
linear arithmetic (by automatic reflection into nat or int), including
wenzelm@24800
  1211
lemmas on overflow and monotonicity.  Instantiated to all appropriate
wenzelm@24800
  1212
arithmetic type classes, supporting automatic simplification of
wenzelm@24800
  1213
numerals on all operations.
kleing@24333
  1214
kleing@24333
  1215
* Library/Boolean_Algebra: locales for abstract boolean algebras.
kleing@24333
  1216
kleing@24333
  1217
* Library/Numeral_Type: numbers as types, e.g. TYPE(32).
kleing@24333
  1218
haftmann@23850
  1219
* Code generator library theories:
haftmann@24993
  1220
  - Code_Integer represents HOL integers by big integer literals in target
haftmann@23850
  1221
    languages.
haftmann@24993
  1222
  - Code_Char represents HOL characters by character literals in target
haftmann@23850
  1223
    languages.
haftmann@24993
  1224
  - Code_Char_chr like Code_Char, but also offers treatment of character
haftmann@24993
  1225
    codes; includes Code_Integer.
wenzelm@24800
  1226
  - Executable_Set allows to generate code for finite sets using lists.
wenzelm@24800
  1227
  - Executable_Rat implements rational numbers as triples (sign, enumerator,
haftmann@23850
  1228
    denominator).
wenzelm@24800
  1229
  - Executable_Real implements a subset of real numbers, namly those
haftmann@23850
  1230
    representable by rational numbers.
wenzelm@24800
  1231
  - Efficient_Nat implements natural numbers by integers, which in general will
haftmann@23850
  1232
    result in higher efficency; pattern matching with 0/Suc is eliminated;
haftmann@24993
  1233
    includes Code_Integer.
haftmann@24993
  1234
  - Code_Index provides an additional datatype index which is mapped to
haftmann@24993
  1235
    target-language built-in integers.
haftmann@26355
  1236
  - Code_Message provides an additional datatype message_string which is isomorphic to
haftmann@24993
  1237
    strings; messages are mapped to target-language strings.
haftmann@23850
  1238
berghofe@23783
  1239
* New package for inductive predicates
berghofe@23783
  1240
berghofe@23783
  1241
  An n-ary predicate p with m parameters z_1, ..., z_m can now be defined via
berghofe@23783
  1242
berghofe@23783
  1243
    inductive
berghofe@23783
  1244
      p :: "U_1 => ... => U_m => T_1 => ... => T_n => bool"
berghofe@23783
  1245
      for z_1 :: U_1 and ... and z_n :: U_m
berghofe@23783
  1246
    where
berghofe@23783
  1247
      rule_1: "... ==> p z_1 ... z_m t_1_1 ... t_1_n"
berghofe@23783
  1248
    | ...
berghofe@23783
  1249
wenzelm@24800
  1250
  with full support for type-inference, rather than
berghofe@23783
  1251
berghofe@23783
  1252
    consts s :: "U_1 => ... => U_m => (T_1 * ... * T_n) set"
berghofe@23783
  1253
berghofe@23783
  1254
    abbreviation p :: "U_1 => ... => U_m => T_1 => ... => T_n => bool"
berghofe@23783
  1255
    where "p z_1 ... z_m x_1 ... x_n == (x_1, ..., x_n) : s z_1 ... z_m"
berghofe@23783
  1256
berghofe@23783
  1257
    inductive "s z_1 ... z_m"
berghofe@23783
  1258
    intros
berghofe@23783
  1259
      rule_1: "... ==> (t_1_1, ..., t_1_n) : s z_1 ... z_m"
berghofe@23783
  1260
      ...
berghofe@23783
  1261
berghofe@23783
  1262
  For backward compatibility, there is a wrapper allowing inductive
berghofe@23783
  1263
  sets to be defined with the new package via
berghofe@23783
  1264
berghofe@23783
  1265
    inductive_set
berghofe@23783
  1266
      s :: "U_1 => ... => U_m => (T_1 * ... * T_n) set"
berghofe@23783
  1267
      for z_1 :: U_1 and ... and z_n :: U_m
berghofe@23783
  1268
    where
berghofe@23783
  1269
      rule_1: "... ==> (t_1_1, ..., t_1_n) : s z_1 ... z_m"
berghofe@23783
  1270
    | ...
berghofe@23783
  1271
berghofe@23783
  1272
  or
berghofe@23783
  1273
berghofe@23783
  1274
    inductive_set
berghofe@23783
  1275
      s :: "U_1 => ... => U_m => (T_1 * ... * T_n) set"
berghofe@23783
  1276
      and p :: "U_1 => ... => U_m => T_1 => ... => T_n => bool"
berghofe@23783
  1277
      for z_1 :: U_1 and ... and z_n :: U_m
berghofe@23783
  1278
    where
berghofe@23783
  1279
      "p z_1 ... z_m x_1 ... x_n == (x_1, ..., x_n) : s z_1 ... z_m"
berghofe@23783
  1280
    | rule_1: "... ==> p z_1 ... z_m t_1_1 ... t_1_n"
berghofe@23783
  1281
    | ...
berghofe@23783
  1282
berghofe@23783
  1283
  if the additional syntax "p ..." is required.
berghofe@23783
  1284
wenzelm@25177
  1285
  Numerous examples can be found in the subdirectories src/HOL/Auth,
wenzelm@25177
  1286
  src/HOL/Bali, src/HOL/Induct, and src/HOL/MicroJava.
berghofe@23783
  1287
berghofe@23783
  1288
  INCOMPATIBILITIES:
berghofe@23783
  1289
berghofe@23783
  1290
  - Since declaration and definition of inductive sets or predicates
wenzelm@24800
  1291
    is no longer separated, abbreviations involving the newly
wenzelm@24800
  1292
    introduced sets or predicates must be specified together with the
wenzelm@24800
  1293
    introduction rules after the 'where' keyword (see above), rather
wenzelm@24800
  1294
    than before the actual inductive definition.
wenzelm@24800
  1295
wenzelm@24800
  1296
  - The variables in induction and elimination rules are now
wenzelm@24800
  1297
    quantified in the order of their occurrence in the introduction
wenzelm@24800
  1298
    rules, rather than in alphabetical order. Since this may break
wenzelm@24800
  1299
    some proofs, these proofs either have to be repaired, e.g. by
wenzelm@24800
  1300
    reordering the variables a_i_1 ... a_i_{k_i} in Isar 'case'
wenzelm@24800
  1301
    statements of the form
berghofe@23783
  1302
berghofe@23783
  1303
      case (rule_i a_i_1 ... a_i_{k_i})
berghofe@23783
  1304
berghofe@23783
  1305
    or the old order of quantification has to be restored by explicitly adding
berghofe@23783
  1306
    meta-level quantifiers in the introduction rules, i.e.
berghofe@23783
  1307
berghofe@23783
  1308
      | rule_i: "!!a_i_1 ... a_i_{k_i}. ... ==> p z_1 ... z_m t_i_1 ... t_i_n"
berghofe@23783
  1309
berghofe@23783
  1310
  - The format of the elimination rules is now
berghofe@23783
  1311
berghofe@23783
  1312
      p z_1 ... z_m x_1 ... x_n ==>
berghofe@23783
  1313
        (!!a_1_1 ... a_1_{k_1}. x_1 = t_1_1 ==> ... ==> x_n = t_1_n ==> ... ==> P)
berghofe@23783
  1314
        ==> ... ==> P
berghofe@23783
  1315
berghofe@23783
  1316
    for predicates and
berghofe@23783
  1317
berghofe@23783
  1318
      (x_1, ..., x_n) : s z_1 ... z_m ==>
berghofe@23783
  1319
        (!!a_1_1 ... a_1_{k_1}. x_1 = t_1_1 ==> ... ==> x_n = t_1_n ==> ... ==> P)
berghofe@23783
  1320
        ==> ... ==> P
berghofe@23783
  1321
berghofe@23783
  1322
    for sets rather than
berghofe@23783
  1323
berghofe@23783
  1324
      x : s z_1 ... z_m ==>
berghofe@23783
  1325
        (!!a_1_1 ... a_1_{k_1}. x = (t_1_1, ..., t_1_n) ==> ... ==> P)
berghofe@23783
  1326
        ==> ... ==> P
berghofe@23783
  1327
wenzelm@24800
  1328
    This may require terms in goals to be expanded to n-tuples
wenzelm@24800
  1329
    (e.g. using case_tac or simplification with the split_paired_all
wenzelm@24800
  1330
    rule) before the above elimination rule is applicable.
wenzelm@24800
  1331
wenzelm@24800
  1332
  - The elimination or case analysis rules for (mutually) inductive
wenzelm@24800
  1333
    sets or predicates are now called "p_1.cases" ... "p_k.cases". The
wenzelm@24800
  1334
    list of rules "p_1_..._p_k.elims" is no longer available.
berghofe@23783
  1335
krauss@25198
  1336
* New package "function"/"fun" for general recursive functions,
krauss@25198
  1337
supporting mutual and nested recursion, definitions in local contexts,
krauss@25198
  1338
more general pattern matching and partiality. See HOL/ex/Fundefs.thy
krauss@25198
  1339
for small examples, and the separate tutorial on the function
krauss@25198
  1340
package. The old recdef "package" is still available as before, but
krauss@25198
  1341
users are encouraged to use the new package.
krauss@25198
  1342
krauss@25198
  1343
* Method "lexicographic_order" automatically synthesizes termination
krauss@25198
  1344
relations as lexicographic combinations of size measures. 
krauss@25198
  1345
wenzelm@24800
  1346
* Case-expressions allow arbitrary constructor-patterns (including
wenzelm@24800
  1347
"_") and take their order into account, like in functional
wenzelm@24800
  1348
programming.  Internally, this is translated into nested
wenzelm@24800
  1349
case-expressions; missing cases are added and mapped to the predefined
wenzelm@24800
  1350
constant "undefined". In complicated cases printing may no longer show
wenzelm@24800
  1351
the original input but the internal form. Lambda-abstractions allow
wenzelm@24800
  1352
the same form of pattern matching: "% pat1 => e1 | ..." is an
wenzelm@24800
  1353
abbreviation for "%x. case x of pat1 => e1 | ..." where x is a new
wenzelm@24800
  1354
variable.
nipkow@23564
  1355
huffman@23468
  1356
* IntDef: The constant "int :: nat => int" has been removed; now "int"
wenzelm@24800
  1357
is an abbreviation for "of_nat :: nat => int". The simplification
wenzelm@24800
  1358
rules for "of_nat" have been changed to work like "int" did
wenzelm@24800
  1359
previously.  Potential INCOMPATIBILITY:
huffman@23468
  1360
  - "of_nat (Suc m)" simplifies to "1 + of_nat m" instead of "of_nat m + 1"
huffman@23468
  1361
  - of_nat_diff and of_nat_mult are no longer default simp rules
huffman@23377
  1362
chaieb@23295
  1363
* Method "algebra" solves polynomial equations over (semi)rings using
wenzelm@24800
  1364
Groebner bases. The (semi)ring structure is defined by locales and the
wenzelm@24800
  1365
tool setup depends on that generic context. Installing the method for
wenzelm@24800
  1366
a specific type involves instantiating the locale and possibly adding
wenzelm@24800
  1367
declarations for computation on the coefficients.  The method is
wenzelm@24800
  1368
already instantiated for natural numbers and for the axiomatic class
wenzelm@24800
  1369
of idoms with numerals.  See also the paper by Chaieb and Wenzel at
wenzelm@24800
  1370
CALCULEMUS 2007 for the general principles underlying this
wenzelm@24800
  1371
architecture of context-aware proof-tools.
wenzelm@24800
  1372
wenzelm@25033
  1373
* Method "ferrack" implements quantifier elimination over
wenzelm@25033
  1374
special-purpose dense linear orders using locales (analogous to
wenzelm@25033
  1375
"algebra"). The method is already installed for class
wenzelm@25033
  1376
{ordered_field,recpower,number_ring} which subsumes real, hyperreal,
wenzelm@25033
  1377
rat, etc.
wenzelm@25033
  1378
wenzelm@24800
  1379
* Former constant "List.op @" now named "List.append".  Use ML
wenzelm@24800
  1380
antiquotations @{const_name List.append} or @{term " ... @ ... "} to
wenzelm@24800
  1381
circumvent possible incompatibilities when working on ML level.
wenzelm@24800
  1382
haftmann@24996
  1383
* primrec: missing cases mapped to "undefined" instead of "arbitrary".
haftmann@22845
  1384
wenzelm@24800
  1385
* New function listsum :: 'a list => 'a for arbitrary monoids.
wenzelm@24800
  1386
Special syntax: "SUM x <- xs. f x" (and latex variants)
wenzelm@24800
  1387
wenzelm@24800
  1388
* New syntax for Haskell-like list comprehension (input only), eg.
wenzelm@25177
  1389
[(x,y). x <- xs, y <- ys, x ~= y], see also src/HOL/List.thy.
wenzelm@24800
  1390
wenzelm@24800
  1391
* The special syntax for function "filter" has changed from [x :
wenzelm@24800
  1392
xs. P] to [x <- xs. P] to avoid an ambiguity caused by list
wenzelm@24800
  1393
comprehension syntax, and for uniformity.  INCOMPATIBILITY.
wenzelm@24800
  1394
wenzelm@24800
  1395
* [a..b] is now defined for arbitrary linear orders.  It used to be
wenzelm@24800
  1396
defined on nat only, as an abbreviation for [a..<Suc b]
wenzelm@24800
  1397
INCOMPATIBILITY.
wenzelm@24800
  1398
wenzelm@24800
  1399
* Renamed lemma "set_take_whileD"  to "set_takeWhileD".
wenzelm@24800
  1400
wenzelm@25177
  1401
* New functions "sorted" and "sort" in src/HOL/List.thy.
wenzelm@24800
  1402
wenzelm@24800
  1403
* New lemma collection field_simps (an extension of ring_simps) for
wenzelm@24800
  1404
manipulating (in)equations involving division. Multiplies with all
wenzelm@24800
  1405
denominators that can be proved to be non-zero (in equations) or
wenzelm@24800
  1406
positive/negative (in inequations).
nipkow@23480
  1407
nipkow@23480
  1408
* Lemma collections ring_eq_simps, group_eq_simps and ring_distrib
wenzelm@24800
  1409
have been improved and renamed to ring_simps, group_simps and
wenzelm@24800
  1410
ring_distribs.  Removed lemmas field_xyz in theory Ring_and_Field
wenzelm@24800
  1411
because they were subsumed by lemmas xyz.  INCOMPATIBILITY.
wenzelm@24800
  1412
wenzelm@25177
  1413
* Theory Library/Commutative_Ring: switched from recdef to function
wenzelm@24800
  1414
package; constants add, mul, pow now curried.  Infix syntax for
wenzelm@24800
  1415
algebraic operations.
haftmann@22735
  1416
wenzelm@24800
  1417
* Dropped redundant lemma def_imp_eq in favor of meta_eq_to_obj_eq.
haftmann@22218
  1418
INCOMPATIBILITY.
haftmann@22218
  1419
wenzelm@24800
  1420
* Dropped redundant lemma if_def2 in favor of if_bool_eq_conj.
haftmann@22218
  1421
INCOMPATIBILITY.
haftmann@22218
  1422
wenzelm@22126
  1423
* HOL/records: generalised field-update to take a function on the
wenzelm@22126
  1424
field rather than the new value: r(|A := x|) is translated to A_update
wenzelm@22126
  1425
(K x) r The K-combinator that is internally used is called K_record.
schirmer@21226
  1426
INCOMPATIBILITY: Usage of the plain update functions has to be
schirmer@21226
  1427
adapted.
schirmer@21226
  1428
 
wenzelm@24800
  1429
* Class "semiring_0" now contains annihilation axioms x * 0 = 0 and 0
wenzelm@24800
  1430
* x = 0, which are required for a semiring.  Richer structures do not
wenzelm@24800
  1431
inherit from semiring_0 anymore, because this property is a theorem
wenzelm@24800
  1432
there, not an axiom.  INCOMPATIBILITY: In instances of semiring_0,
wenzelm@24800
  1433
there is more to prove, but this is mostly trivial.
wenzelm@24800
  1434
wenzelm@24800
  1435
* Class "recpower" is generalized to arbitrary monoids, not just
wenzelm@24800
  1436
commutative semirings.  INCOMPATIBILITY: may need to incorporate
haftmann@25163
  1437
commutativity or semiring properties additionally.
haftmann@21215
  1438
haftmann@21099
  1439
* Constant "List.list_all2" in List.thy now uses authentic syntax.
wenzelm@24800
  1440
INCOMPATIBILITY: translations containing list_all2 may go wrong,
wenzelm@24800
  1441
better use 'abbreviation'.
wenzelm@24800
  1442
wenzelm@24800
  1443
* Renamed constant "List.op mem" to "List.member".  INCOMPATIBILITY.
wenzelm@24800
  1444
wenzelm@22126
  1445
* Numeral syntax: type 'bin' which was a mere type copy of 'int' has
wenzelm@24800
  1446
been abandoned in favour of plain 'int'.  INCOMPATIBILITY --
wenzelm@22126
  1447
significant changes for setting up numeral syntax for types:
wenzelm@24800
  1448
  - New constants Numeral.pred and Numeral.succ instead
haftmann@20485
  1449
      of former Numeral.bin_pred and Numeral.bin_succ.
haftmann@20485
  1450
  - Use integer operations instead of bin_add, bin_mult and so on.
haftmann@20485
  1451
  - Numeral simplification theorems named Numeral.numeral_simps instead of Bin_simps.
haftmann@20485
  1452
  - ML structure Bin_Simprocs now named Int_Numeral_Base_Simprocs.
haftmann@20485
  1453
wenzelm@25177
  1454
See src/HOL/Integ/IntArith.thy for an example setup.
wenzelm@25177
  1455
wenzelm@25177
  1456
* Command 'normal_form' computes the normal form of a term that may
wenzelm@25177
  1457
contain free variables.  For example ``normal_form "rev [a, b, c]"''
wenzelm@25177
  1458
produces ``[b, c, a]'' (without proof).  This command is suitable for
wenzelm@25177
  1459
heavy-duty computations because the functions are compiled to ML
wenzelm@25177
  1460
first.  Correspondingly, a method "normalization" is provided.  See
wenzelm@25177
  1461
further src/HOL/ex/NormalForm.thy and src/Tools/nbe.ML.
nipkow@19895
  1462
wenzelm@17996
  1463
* Alternative iff syntax "A <-> B" for equality on bool (with priority
wenzelm@17996
  1464
25 like -->); output depends on the "iff" print_mode, the default is
wenzelm@17996
  1465
"A = B" (with priority 50).
wenzelm@17996
  1466
wenzelm@21265
  1467
* Relations less (<) and less_eq (<=) are also available on type bool.
wenzelm@21265
  1468
Modified syntax to disallow nesting without explicit parentheses,
wenzelm@24800
  1469
e.g. "(x < y) < z" or "x < (y < z)", but NOT "x < y < z".  Potential
wenzelm@24800
  1470
INCOMPATIBILITY.
wenzelm@21265
  1471
nipkow@18674
  1472
* "LEAST x:A. P" expands to "LEAST x. x:A & P" (input only).
nipkow@18674
  1473
krauss@20716
  1474
* Relation composition operator "op O" now has precedence 75 and binds
krauss@20716
  1475
stronger than union and intersection. INCOMPATIBILITY.
krauss@20716
  1476
wenzelm@22126
  1477
* The old set interval syntax "{m..n(}" (and relatives) has been
wenzelm@22126
  1478
removed.  Use "{m..<n}" (and relatives) instead.
nipkow@19377
  1479
wenzelm@17865
  1480
* In the context of the assumption "~(s = t)" the Simplifier rewrites
wenzelm@24800
  1481
"t = s" to False (by simproc "neq").  INCOMPATIBILITY, consider using
wenzelm@24800
  1482
``declare [[simproc del: neq]]''.
wenzelm@24800
  1483
wenzelm@24800
  1484
* Simplifier: "m dvd n" where m and n are numbers is evaluated to
wenzelm@24800
  1485
True/False.
wenzelm@24800
  1486
wenzelm@24800
  1487
* Theorem Cons_eq_map_conv no longer declared as "simp".
nipkow@19211
  1488
ballarin@19279
  1489
* Theorem setsum_mult renamed to setsum_right_distrib.
ballarin@19279
  1490
nipkow@19211
  1491
* Prefer ex1I over ex_ex1I in single-step reasoning, e.g. by the
wenzelm@22126
  1492
``rule'' method.
wenzelm@22126
  1493
wenzelm@24800
  1494
* Reimplemented methods "sat" and "satx", with several improvements:
wenzelm@24800
  1495
goals no longer need to be stated as "<prems> ==> False", equivalences
wenzelm@24800
  1496
(i.e. "=" on type bool) are handled, variable names of the form
wenzelm@24800
  1497
"lit_<n>" are no longer reserved, significant speedup.
wenzelm@24800
  1498
wenzelm@24800
  1499
* Methods "sat" and "satx" can now replay MiniSat proof traces.
wenzelm@22126
  1500
zChaff is still supported as well.
wenzelm@22126
  1501
wenzelm@22126
  1502
* 'inductive' and 'datatype': provide projections of mutual rules,
wenzelm@22126
  1503
bundled as foo_bar.inducts;
wenzelm@22126
  1504
wenzelm@22126
  1505
* Library: moved theories Parity, GCD, Binomial, Infinite_Set to
wenzelm@22126
  1506
Library.
wenzelm@21256
  1507
wenzelm@21256
  1508
* Library: moved theory Accessible_Part to main HOL.
wenzelm@19572
  1509
wenzelm@18446
  1510
* Library: added theory Coinductive_List of potentially infinite lists
wenzelm@18446
  1511
as greatest fixed-point.
wenzelm@18399
  1512
wenzelm@19254
  1513
* Library: added theory AssocList which implements (finite) maps as
schirmer@19252
  1514
association lists.
webertj@17809
  1515
wenzelm@24800
  1516
* Method "evaluation" solves goals (i.e. a boolean expression)
wenzelm@24800
  1517
efficiently by compiling it to ML.  The goal is "proved" (via an
wenzelm@24800
  1518
oracle) if it evaluates to True.
wenzelm@20807
  1519
wenzelm@20807
  1520
* Linear arithmetic now splits certain operators (e.g. min, max, abs)
wenzelm@24800
  1521
also when invoked by the simplifier.  This results in the Simplifier
wenzelm@24800
  1522
being more powerful on arithmetic goals.  INCOMPATIBILITY.
wenzelm@24800
  1523
Configuration option fast_arith_split_limit=0 recovers the old
wenzelm@24800
  1524
behavior.
webertj@20217
  1525
wenzelm@22126
  1526
* Support for hex (0x20) and binary (0b1001) numerals.
wenzelm@19254
  1527
wenzelm@20807
  1528
* New method: reify eqs (t), where eqs are equations for an
wenzelm@20807
  1529
interpretation I :: 'a list => 'b => 'c and t::'c is an optional
wenzelm@20807
  1530
parameter, computes a term s::'b and a list xs::'a list and proves the
wenzelm@20807
  1531
theorem I xs s = t. This is also known as reification or quoting. The
wenzelm@20807
  1532
resulting theorem is applied to the subgoal to substitute t with I xs
wenzelm@20807
  1533
s.  If t is omitted, the subgoal itself is reified.
wenzelm@20807
  1534
wenzelm@20807
  1535
* New method: reflection corr_thm eqs (t). The parameters eqs and (t)
wenzelm@20807
  1536
are as explained above. corr_thm is a theorem for I vs (f t) = I vs t,
wenzelm@20807
  1537
where f is supposed to be a computable function (in the sense of code
wenzelm@20807
  1538
generattion). The method uses reify to compute s and xs as above then
wenzelm@20807
  1539
applies corr_thm and uses normalization by evaluation to "prove" f s =
wenzelm@20807
  1540
r and finally gets the theorem t = r, which is again applied to the
wenzelm@25177
  1541
subgoal. An Example is available in src/HOL/ex/ReflectionEx.thy.
wenzelm@25177
  1542
wenzelm@25177
  1543
* Reflection: Automatic reification now handels binding, an example is
wenzelm@25177
  1544
available in src/HOL/ex/ReflectionEx.thy
wenzelm@20807
  1545
wenzelm@25397
  1546
* HOL-Statespace: ``State Spaces: The Locale Way'' introduces a
schirmer@25409
  1547
command 'statespace' that is similar to 'record', but introduces an
wenzelm@25397
  1548
abstract specification based on the locale infrastructure instead of
wenzelm@25397
  1549
HOL types.  This leads to extra flexibility in composing state spaces,
wenzelm@25397
  1550
in particular multiple inheritance and renaming of components.
wenzelm@25397
  1551
wenzelm@25397
  1552
wenzelm@19653
  1553
*** HOL-Complex ***
wenzelm@19653
  1554
huffman@22971
  1555
* Hyperreal: Functions root and sqrt are now defined on negative real
huffman@22971
  1556
inputs so that root n (- x) = - root n x and sqrt (- x) = - sqrt x.
huffman@22971
  1557
Nonnegativity side conditions have been removed from many lemmas, so
huffman@22971
  1558
that more subgoals may now be solved by simplification; potential
huffman@22971
  1559
INCOMPATIBILITY.
huffman@22971
  1560
wenzelm@24800
  1561
* Real: new type classes formalize real normed vector spaces and
huffman@21791
  1562
algebras, using new overloaded constants scaleR :: real => 'a => 'a
huffman@21791
  1563
and norm :: 'a => real.
huffman@21791
  1564
wenzelm@24800
  1565
* Real: constant of_real :: real => 'a::real_algebra_1 injects from
wenzelm@24800
  1566
reals into other types. The overloaded constant Reals :: 'a set is now
wenzelm@24800
  1567
defined as range of_real; potential INCOMPATIBILITY.
wenzelm@24800
  1568
wenzelm@24800
  1569
* Real: proper support for ML code generation, including 'quickcheck'.
nipkow@23013
  1570
Reals are implemented as arbitrary precision rationals.
nipkow@23013
  1571
wenzelm@22126
  1572
* Hyperreal: Several constants that previously worked only for the
wenzelm@22126
  1573
reals have been generalized, so they now work over arbitrary vector
wenzelm@22126
  1574
spaces. Type annotations may need to be added in some cases; potential
wenzelm@22126
  1575
INCOMPATIBILITY.
huffman@21791
  1576
huffman@22972
  1577
  Infinitesimal  :: ('a::real_normed_vector) star set
huffman@22972
  1578
  HFinite        :: ('a::real_normed_vector) star set
huffman@22972
  1579
  HInfinite      :: ('a::real_normed_vector) star set
huffman@21791
  1580
  approx         :: ('a::real_normed_vector) star => 'a star => bool
huffman@21791
  1581
  monad          :: ('a::real_normed_vector) star => 'a star set
huffman@21791
  1582
  galaxy         :: ('a::real_normed_vector) star => 'a star set
huffman@22972
  1583
  (NS)LIMSEQ     :: [nat => 'a::real_normed_vector, 'a] => bool
huffman@21791
  1584
  (NS)convergent :: (nat => 'a::real_normed_vector) => bool
huffman@21791
  1585
  (NS)Bseq       :: (nat => 'a::real_normed_vector) => bool
huffman@21791
  1586
  (NS)Cauchy     :: (nat => 'a::real_normed_vector) => bool
huffman@21791
  1587
  (NS)LIM        :: ['a::real_normed_vector => 'b::real_normed_vector, 'a, 'b] => bool
huffman@21791
  1588
  is(NS)Cont     :: ['a::real_normed_vector => 'b::real_normed_vector, 'a] => bool
huffman@21791
  1589
  deriv          :: ['a::real_normed_field => 'a, 'a, 'a] => bool
huffman@22972
  1590
  sgn            :: 'a::real_normed_vector => 'a
huffman@23116
  1591
  exp            :: 'a::{recpower,real_normed_field,banach} => 'a
huffman@21791
  1592
huffman@21791
  1593
* Complex: Some complex-specific constants are now abbreviations for
wenzelm@22126
  1594
overloaded ones: complex_of_real = of_real, cmod = norm, hcmod =
wenzelm@22126
  1595
hnorm.  Other constants have been entirely removed in favor of the
wenzelm@22126
  1596
polymorphic versions (INCOMPATIBILITY):
huffman@21791
  1597
huffman@21791
  1598
  approx        <-- capprox
huffman@21791
  1599
  HFinite       <-- CFinite
huffman@21791
  1600
  HInfinite     <-- CInfinite
huffman@21791
  1601
  Infinitesimal <-- CInfinitesimal
huffman@21791
  1602
  monad         <-- cmonad
huffman@21791
  1603
  galaxy        <-- cgalaxy
huffman@21791
  1604
  (NS)LIM       <-- (NS)CLIM, (NS)CRLIM
huffman@21791
  1605
  is(NS)Cont    <-- is(NS)Contc, is(NS)contCR
huffman@21791
  1606
  (ns)deriv     <-- (ns)cderiv
huffman@21791
  1607
wenzelm@19653
  1608
wenzelm@24801
  1609
*** HOL-Algebra ***
wenzelm@24801
  1610
wenzelm@24801
  1611
* Formalisation of ideals and the quotient construction over rings.
wenzelm@24801
  1612
wenzelm@24801
  1613
* Order and lattice theory no longer based on records.
wenzelm@24801
  1614
INCOMPATIBILITY.
wenzelm@24801
  1615
wenzelm@24801
  1616
* Renamed lemmas least_carrier -> least_closed and greatest_carrier ->
wenzelm@24801
  1617
greatest_closed.  INCOMPATIBILITY.
wenzelm@24801
  1618
wenzelm@24801
  1619
* Method algebra is now set up via an attribute.  For examples see
wenzelm@24801
  1620
Ring.thy.  INCOMPATIBILITY: the method is now weaker on combinations
wenzelm@24801
  1621
of algebraic structures.
wenzelm@24801
  1622
wenzelm@24801
  1623
* Renamed theory CRing to Ring.
wenzelm@24801
  1624
wenzelm@24801
  1625
wenzelm@24801
  1626
*** HOL-Nominal ***
wenzelm@24801
  1627
wenzelm@25148
  1628
* Substantial, yet incomplete support for nominal datatypes (binding
wenzelm@25177
  1629
structures) based on HOL-Nominal logic.  See src/HOL/Nominal and
wenzelm@25177
  1630
src/HOL/Nominal/Examples.  Prospective users should consult
wenzelm@25148
  1631
http://isabelle.in.tum.de/nominal/
wenzelm@25148
  1632
wenzelm@24801
  1633
wenzelm@17878
  1634
*** ML ***
wenzelm@17878
  1635
wenzelm@24643
  1636
* ML basics: just one true type int, which coincides with IntInf.int
wenzelm@24643
  1637
(even on SML/NJ).
wenzelm@24643
  1638
wenzelm@22138
  1639
* ML within Isar: antiquotations allow to embed statically-checked
wenzelm@22138
  1640
formal entities in the source, referring to the context available at
wenzelm@22138
  1641
compile-time.  For example:
wenzelm@22138
  1642
wenzelm@25142
  1643
ML {* @{sort "{zero,one}"} *}
wenzelm@22138
  1644
ML {* @{typ "'a => 'b"} *}
wenzelm@22138
  1645
ML {* @{term "%x. x"} *}
wenzelm@22138
  1646
ML {* @{prop "x == y"} *}
wenzelm@22138
  1647
ML {* @{ctyp "'a => 'b"} *}
wenzelm@22138
  1648
ML {* @{cterm "%x. x"} *}
wenzelm@22138
  1649
ML {* @{cprop "x == y"} *}
wenzelm@22138
  1650
ML {* @{thm asm_rl} *}
wenzelm@22138
  1651
ML {* @{thms asm_rl} *}
wenzelm@24692
  1652
ML {* @{type_name c} *}
wenzelm@25142
  1653
ML {* @{type_syntax c} *}
wenzelm@22376
  1654
ML {* @{const_name c} *}
wenzelm@22376
  1655
ML {* @{const_syntax c} *}
wenzelm@22138
  1656
ML {* @{context} *}
wenzelm@22138
  1657
ML {* @{theory} *}
wenzelm@22138
  1658
ML {* @{theory Pure} *}
wenzelm@24692
  1659
ML {* @{theory_ref} *}
wenzelm@24692
  1660
ML {* @{theory_ref Pure} *}
wenzelm@22138
  1661
ML {* @{simpset} *}
wenzelm@22138
  1662
ML {* @{claset} *}
wenzelm@22138
  1663
ML {* @{clasimpset} *}
wenzelm@22138
  1664
wenzelm@22151
  1665
The same works for sources being ``used'' within an Isar context.
wenzelm@22151
  1666
wenzelm@22152
  1667
* ML in Isar: improved error reporting; extra verbosity with
wenzelm@24706
  1668
ML_Context.trace enabled.
wenzelm@22152
  1669
wenzelm@19032
  1670
* Pure/General/table.ML: the join operations now works via exceptions
wenzelm@24706
  1671
DUP/SAME instead of type option. This is simpler in simple cases, and
wenzelm@19081
  1672
admits slightly more efficient complex applications.
wenzelm@18446
  1673
wenzelm@24800
  1674
* Pure: 'advanced' translation functions (parse_translation etc.) now
wenzelm@24800
  1675
use Context.generic instead of just theory.
wenzelm@24800
  1676
wenzelm@18642
  1677
* Pure: datatype Context.generic joins theory/Proof.context and
wenzelm@18644
  1678
provides some facilities for code that works in either kind of
wenzelm@18642
  1679
context, notably GenericDataFun for uniform theory and proof data.
wenzelm@18642
  1680
wenzelm@18737
  1681
* Pure: simplified internal attribute type, which is now always
wenzelm@24706
  1682
Context.generic * thm -> Context.generic * thm. Global (theory) vs.
wenzelm@24706
  1683
local (Proof.context) attributes have been discontinued, while
wenzelm@24706
  1684
minimizing code duplication. Thm.rule_attribute and
wenzelm@24706
  1685
Thm.declaration_attribute build canonical attributes; see also structure
wenzelm@24706
  1686
Context for further operations on Context.generic, notably
wenzelm@24706
  1687
GenericDataFun. INCOMPATIBILITY, need to adapt attribute type
wenzelm@19006
  1688
declarations and definitions.
wenzelm@19006
  1689
wenzelm@24800
  1690
* Context data interfaces (Theory/Proof/GenericDataFun): removed
wenzelm@24800
  1691
name/print, uninitialized data defaults to ad-hoc copy of empty value,
wenzelm@24800
  1692
init only required for impure data. INCOMPATIBILITY: empty really need
wenzelm@24800
  1693
to be empty (no dependencies on theory content!)
wenzelm@24800
  1694
wenzelm@19508
  1695
* Pure/kernel: consts certification ignores sort constraints given in
wenzelm@24800
  1696
signature declarations. (This information is not relevant to the
wenzelm@24800
  1697
logic, but only for type inference.) SIGNIFICANT INTERNAL CHANGE,
wenzelm@24800
  1698
potential INCOMPATIBILITY.
wenzelm@19508
  1699
wenzelm@19508
  1700
* Pure: axiomatic type classes are now purely definitional, with
wenzelm@19508
  1701
explicit proofs of class axioms and super class relations performed
wenzelm@24706
  1702
internally. See Pure/axclass.ML for the main internal interfaces --
wenzelm@19508
  1703
notably AxClass.define_class supercedes AxClass.add_axclass, and
wenzelm@24706
  1704
AxClass.axiomatize_class/classrel/arity supersede
wenzelm@19508
  1705
Sign.add_classes/classrel/arities.
wenzelm@19508
  1706
wenzelm@19006
  1707
* Pure/Isar: Args/Attrib parsers operate on Context.generic --
wenzelm@19006
  1708
global/local versions on theory vs. Proof.context have been
wenzelm@19006
  1709
discontinued; Attrib.syntax and Method.syntax have been adapted
wenzelm@19006
  1710
accordingly.  INCOMPATIBILITY, need to adapt parser expressions for
wenzelm@19006
  1711
attributes, methods, etc.
wenzelm@18642
  1712
wenzelm@18446
  1713
* Pure: several functions of signature "... -> theory -> theory * ..."
wenzelm@18446
  1714
have been reoriented to "... -> theory -> ... * theory" in order to
wenzelm@18446
  1715
allow natural usage in combination with the ||>, ||>>, |-> and
wenzelm@18446
  1716
fold_map combinators.
haftmann@18051
  1717
wenzelm@21647
  1718
* Pure: official theorem names (closed derivations) and additional
wenzelm@21647
  1719
comments (tags) are now strictly separate.  Name hints -- which are
wenzelm@21647
  1720
maintained as tags -- may be attached any time without affecting the
wenzelm@21647
  1721
derivation.
wenzelm@21647
  1722
wenzelm@18020
  1723
* Pure: primitive rule lift_rule now takes goal cterm instead of an
wenzelm@18145
  1724
actual goal state (thm).  Use Thm.lift_rule (Thm.cprem_of st i) to
wenzelm@18020
  1725
achieve the old behaviour.
wenzelm@18020
  1726
wenzelm@18020
  1727
* Pure: the "Goal" constant is now called "prop", supporting a
wenzelm@18020
  1728
slightly more general idea of ``protecting'' meta-level rule
wenzelm@18020
  1729
statements.
wenzelm@18020
  1730
wenzelm@20040
  1731
* Pure: Logic.(un)varify only works in a global context, which is now
wenzelm@20040
  1732
enforced instead of silently assumed.  INCOMPATIBILITY, may use
wenzelm@20040
  1733
Logic.legacy_(un)varify as temporary workaround.
wenzelm@20040
  1734
wenzelm@20090
  1735
* Pure: structure Name provides scalable operations for generating
wenzelm@20090
  1736
internal variable names, notably Name.variants etc.  This replaces
wenzelm@20090
  1737
some popular functions from term.ML:
wenzelm@20090
  1738
wenzelm@20090
  1739
  Term.variant		->  Name.variant
wenzelm@24800
  1740
  Term.variantlist	->  Name.variant_list
wenzelm@20090
  1741
  Term.invent_names	->  Name.invent_list
wenzelm@20090
  1742
wenzelm@20090
  1743
Note that low-level renaming rarely occurs in new code -- operations
wenzelm@20090
  1744
from structure Variable are used instead (see below).
wenzelm@20090
  1745
wenzelm@20040
  1746
* Pure: structure Variable provides fundamental operations for proper
wenzelm@20040
  1747
treatment of fixed/schematic variables in a context.  For example,
wenzelm@20040
  1748
Variable.import introduces fixes for schematics of given facts and
wenzelm@20040
  1749
Variable.export reverses the effect (up to renaming) -- this replaces
wenzelm@20040
  1750
various freeze_thaw operations.
wenzelm@20040
  1751
wenzelm@18567
  1752
* Pure: structure Goal provides simple interfaces for
wenzelm@17981
  1753
init/conclude/finish and tactical prove operations (replacing former
wenzelm@20040
  1754
Tactic.prove).  Goal.prove is the canonical way to prove results
wenzelm@20040
  1755
within a given context; Goal.prove_global is a degraded version for
wenzelm@20040
  1756
theory level goals, including a global Drule.standard.  Note that
wenzelm@20040
  1757
OldGoals.prove_goalw_cterm has long been obsolete, since it is
wenzelm@20040
  1758
ill-behaved in a local proof context (e.g. with local fixes/assumes or
wenzelm@20040
  1759
in a locale context).
wenzelm@17981
  1760
wenzelm@24706
  1761
* Pure/Syntax: generic interfaces for parsing (Syntax.parse_term etc.)
wenzelm@24706
  1762
and type checking (Syntax.check_term etc.), with common combinations
wenzelm@24706
  1763
(Syntax.read_term etc.). These supersede former Sign.read_term etc.
wenzelm@24706
  1764
which are considered legacy and await removal.
wenzelm@24706
  1765
wenzelm@24920
  1766
* Pure/Syntax: generic interfaces for type unchecking
wenzelm@24920
  1767
(Syntax.uncheck_terms etc.) and unparsing (Syntax.unparse_term etc.),
wenzelm@24920
  1768
with common combinations (Syntax.pretty_term, Syntax.string_of_term
wenzelm@24920
  1769
etc.).  Former Sign.pretty_term, Sign.string_of_term etc. are still
wenzelm@24924
  1770
available for convenience, but refer to the very same operations using
wenzelm@24924
  1771
a mere theory instead of a full context.
wenzelm@24920
  1772
wenzelm@18815
  1773
* Isar: simplified treatment of user-level errors, using exception
wenzelm@18687
  1774
ERROR of string uniformly.  Function error now merely raises ERROR,
wenzelm@18686
  1775
without any side effect on output channels.  The Isar toplevel takes
wenzelm@18686
  1776
care of proper display of ERROR exceptions.  ML code may use plain
wenzelm@18686
  1777
handle/can/try; cat_error may be used to concatenate errors like this:
wenzelm@18686
  1778
wenzelm@18686
  1779
  ... handle ERROR msg => cat_error msg "..."
wenzelm@18686
  1780
wenzelm@18686
  1781
Toplevel ML code (run directly or through the Isar toplevel) may be
wenzelm@18687
  1782
embedded into the Isar toplevel with exception display/debug like
wenzelm@18687
  1783
this:
wenzelm@18686
  1784
wenzelm@18686
  1785
  Isar.toplevel (fn () => ...)
wenzelm@18686
  1786
wenzelm@18686
  1787
INCOMPATIBILITY, removed special transform_error facilities, removed
wenzelm@18686
  1788
obsolete variants of user-level exceptions (ERROR_MESSAGE,
wenzelm@18686
  1789
Context.PROOF, ProofContext.CONTEXT, Proof.STATE, ProofHistory.FAIL)
wenzelm@18686
  1790
-- use plain ERROR instead.
wenzelm@18686
  1791
wenzelm@18815
  1792
* Isar: theory setup now has type (theory -> theory), instead of a
wenzelm@18722
  1793
list.  INCOMPATIBILITY, may use #> to compose setup functions.
wenzelm@18722
  1794
wenzelm@24706
  1795
* Isar: ML toplevel pretty printer for type Proof.context, subject to
wenzelm@24706
  1796
ProofContext.debug/verbose flags.
wenzelm@18815
  1797
wenzelm@18815
  1798
* Isar: Toplevel.theory_to_proof admits transactions that modify the
wenzelm@18815
  1799
theory before entering a proof state.  Transactions now always see a
wenzelm@18815
  1800
quasi-functional intermediate checkpoint, both in interactive and
wenzelm@18590
  1801
batch mode.
wenzelm@18567
  1802
wenzelm@24867
  1803
* Isar: simplified interfaces for outer syntax.  Renamed
wenzelm@24867
  1804
OuterSyntax.add_keywords to OuterSyntax.keywords.  Removed
wenzelm@24867
  1805
OuterSyntax.add_parsers -- this functionality is now included in
wenzelm@24867
  1806
OuterSyntax.command etc.  INCOMPATIBILITY.
wenzelm@24867
  1807
wenzelm@17878
  1808
* Simplifier: the simpset of a running simplification process now
wenzelm@17878
  1809
contains a proof context (cf. Simplifier.the_context), which is the
wenzelm@17878
  1810
very context that the initial simpset has been retrieved from (by
wenzelm@17890
  1811
simpset_of/local_simpset_of).  Consequently, all plug-in components
wenzelm@17878
  1812
(solver, looper etc.) may depend on arbitrary proof data.
wenzelm@17878
  1813
wenzelm@17878
  1814
* Simplifier.inherit_context inherits the proof context (plus the
wenzelm@17878
  1815
local bounds) of the current simplification process; any simproc
wenzelm@17878
  1816
etc. that calls the Simplifier recursively should do this!  Removed
wenzelm@17878
  1817
former Simplifier.inherit_bounds, which is already included here --
wenzelm@17890
  1818
INCOMPATIBILITY.  Tools based on low-level rewriting may even have to
wenzelm@17890
  1819
specify an explicit context using Simplifier.context/theory_context.
wenzelm@17878
  1820
wenzelm@17878
  1821
* Simplifier/Classical Reasoner: more abstract interfaces
wenzelm@17878
  1822
change_simpset/claset for modifying the simpset/claset reference of a
wenzelm@17878
  1823
theory; raw versions simpset/claset_ref etc. have been discontinued --
wenzelm@17878
  1824
INCOMPATIBILITY.
wenzelm@17878
  1825
wenzelm@18540
  1826
* Provers: more generic wrt. syntax of object-logics, avoid hardwired
wenzelm@18540
  1827
"Trueprop" etc.
wenzelm@18540
  1828
wenzelm@17878
  1829
wenzelm@20988
  1830
*** System ***
wenzelm@20988
  1831
wenzelm@25433
  1832
* settings: the default heap location within ISABELLE_HOME_USER now
wenzelm@25433
  1833
includes ISABELLE_IDENTIFIER.  This simplifies use of multiple
wenzelm@25433
  1834
Isabelle installations.
wenzelm@21471
  1835
wenzelm@20988
  1836
* isabelle-process: option -S (secure mode) disables some critical
wenzelm@20988
  1837
operations, notably runtime compilation and evaluation of ML source
wenzelm@20988
  1838
code.
wenzelm@20988
  1839
wenzelm@24891
  1840
* Basic Isabelle mode for jEdit, see Isabelle/lib/jedit/.
wenzelm@24891
  1841
wenzelm@24801
  1842
* Support for parallel execution, using native multicore support of
wenzelm@24800
  1843
Poly/ML 5.1.  The theory loader exploits parallelism when processing
wenzelm@24800
  1844
independent theories, according to the given theory header
wenzelm@24800
  1845
specifications. The maximum number of worker threads is specified via
wenzelm@24800
  1846
usedir option -M or the "max-threads" setting in Proof General. A
wenzelm@24800
  1847
speedup factor of 1.5--3.5 can be expected on a 4-core machine, and up
wenzelm@24800
  1848
to 6 on a 8-core machine.  User-code needs to observe certain
wenzelm@24800
  1849
guidelines for thread-safe programming, see appendix A in the Isar
wenzelm@24800
  1850
Implementation manual.
wenzelm@24210
  1851
wenzelm@17754
  1852
wenzelm@25448
  1853
wenzelm@17720
  1854
New in Isabelle2005 (October 2005)
wenzelm@17720
  1855
----------------------------------
wenzelm@14655
  1856
wenzelm@14655
  1857
*** General ***
wenzelm@14655
  1858
nipkow@15130
  1859
* Theory headers: the new header syntax for Isar theories is
nipkow@15130
  1860
nipkow@15130
  1861
  theory <name>
wenzelm@16234
  1862
  imports <theory1> ... <theoryN>
wenzelm@16234
  1863
  uses <file1> ... <fileM>
nipkow@15130
  1864
  begin
nipkow@15130
  1865
wenzelm@16234
  1866
where the 'uses' part is optional.  The previous syntax
wenzelm@16234
  1867
wenzelm@16234
  1868
  theory <name> = <theory1> + ... + <theoryN>:
wenzelm@16234
  1869
wenzelm@16717
  1870
will disappear in the next release.  Use isatool fixheaders to convert
wenzelm@16717
  1871
existing theory files.  Note that there is no change in ancient
wenzelm@17371
  1872
non-Isar theories now, but these will disappear soon.
nipkow@15130
  1873
berghofe@15475
  1874
* Theory loader: parent theories can now also be referred to via
wenzelm@16234
  1875
relative and absolute paths.
wenzelm@16234
  1876
wenzelm@17408
  1877
* Command 'find_theorems' searches for a list of criteria instead of a
wenzelm@17408
  1878
list of constants. Known criteria are: intro, elim, dest, name:string,
wenzelm@17408
  1879
simp:term, and any term. Criteria can be preceded by '-' to select
wenzelm@17408
  1880
theorems that do not match. Intro, elim, dest select theorems that
wenzelm@17408
  1881
match the current goal, name:s selects theorems whose fully qualified
wenzelm@17408
  1882
name contain s, and simp:term selects all simplification rules whose
wenzelm@17408
  1883
lhs match term.  Any other term is interpreted as pattern and selects
wenzelm@17408
  1884
all theorems matching the pattern. Available in ProofGeneral under
wenzelm@17408
  1885
'ProofGeneral -> Find Theorems' or C-c C-f.  Example:
wenzelm@16234
  1886
wenzelm@17275
  1887
  C-c C-f (100) "(_::nat) + _ + _" intro -name: "HOL."
wenzelm@16234
  1888
wenzelm@16234
  1889
prints the last 100 theorems matching the pattern "(_::nat) + _ + _",
wenzelm@16234
  1890
matching the current goal as introduction rule and not having "HOL."
wenzelm@16234
  1891
in their name (i.e. not being defined in theory HOL).
wenzelm@16013
  1892
wenzelm@17408
  1893
* Command 'thms_containing' has been discontinued in favour of
wenzelm@17408
  1894
'find_theorems'; INCOMPATIBILITY.
wenzelm@17408
  1895
wenzelm@17385
  1896
* Communication with Proof General is now 8bit clean, which means that
wenzelm@17385
  1897
Unicode text in UTF-8 encoding may be used within theory texts (both
wenzelm@17408
  1898
formal and informal parts).  Cf. option -U of the Isabelle Proof
wenzelm@17538
  1899
General interface.  Here are some simple examples (cf. src/HOL/ex):
wenzelm@17538
  1900
wenzelm@17538
  1901
  http://isabelle.in.tum.de/library/HOL/ex/Hebrew.html
wenzelm@17538
  1902
  http://isabelle.in.tum.de/library/HOL/ex/Chinese.html
wenzelm@17385
  1903
wenzelm@17425
  1904
* Improved efficiency of the Simplifier and, to a lesser degree, the
wenzelm@17425
  1905
Classical Reasoner.  Typical big applications run around 2 times
wenzelm@17425
  1906
faster.
wenzelm@17425
  1907
wenzelm@15703
  1908
wenzelm@15703
  1909
*** Document preparation ***
wenzelm@15703
  1910
wenzelm@16234
  1911
* Commands 'display_drafts' and 'print_drafts' perform simple output
wenzelm@16234
  1912
of raw sources.  Only those symbols that do not require additional
wenzelm@16234
  1913
LaTeX packages (depending on comments in isabellesym.sty) are
wenzelm@16234
  1914
displayed properly, everything else is left verbatim.  isatool display
wenzelm@16234
  1915
and isatool print are used as front ends (these are subject to the
wenzelm@16234
  1916
DVI/PDF_VIEWER and PRINT_COMMAND settings, respectively).
wenzelm@16234
  1917
wenzelm@17047
  1918
* Command tags control specific markup of certain regions of text,
wenzelm@17047
  1919
notably folding and hiding.  Predefined tags include "theory" (for
wenzelm@17047
  1920
theory begin and end), "proof" for proof commands, and "ML" for
wenzelm@17047
  1921
commands involving ML code; the additional tags "visible" and
wenzelm@17047
  1922
"invisible" are unused by default.  Users may give explicit tag
wenzelm@17047
  1923
specifications in the text, e.g. ''by %invisible (auto)''.  The
wenzelm@17047
  1924
interpretation of tags is determined by the LaTeX job during document
wenzelm@17047
  1925
preparation: see option -V of isatool usedir, or options -n and -t of
wenzelm@17047
  1926
isatool document, or even the LaTeX macros \isakeeptag, \isafoldtag,
wenzelm@17047
  1927
\isadroptag.
wenzelm@17047
  1928
wenzelm@17047
  1929
Several document versions may be produced at the same time via isatool
wenzelm@17047
  1930
usedir (the generated index.html will link all of them).  Typical
wenzelm@17047
  1931
specifications include ''-V document=theory,proof,ML'' to present
wenzelm@17047
  1932
theory/proof/ML parts faithfully, ''-V outline=/proof,/ML'' to fold
wenzelm@17047
  1933
proof and ML commands, and ''-V mutilated=-theory,-proof,-ML'' to omit
wenzelm@17047
  1934
these parts without any formal replacement text.  The Isabelle site
wenzelm@17047
  1935
default settings produce ''document'' and ''outline'' versions as
wenzelm@17047
  1936
specified above.
wenzelm@16234
  1937
haftmann@17402
  1938
* Several new antiquotations:
wenzelm@15979
  1939
wenzelm@15979
  1940
  @{term_type term} prints a term with its type annotated;
wenzelm@15979
  1941
wenzelm@15979
  1942
  @{typeof term} prints the type of a term;
wenzelm@15979
  1943
wenzelm@16234
  1944
  @{const const} is the same as @{term const}, but checks that the
wenzelm@16234
  1945
  argument is a known logical constant;
wenzelm@15979
  1946
wenzelm@15979
  1947
  @{term_style style term} and @{thm_style style thm} print a term or
wenzelm@16234
  1948
  theorem applying a "style" to it
wenzelm@16234
  1949
wenzelm@17117
  1950
  @{ML text}
wenzelm@17117
  1951
wenzelm@16234
  1952
Predefined styles are 'lhs' and 'rhs' printing the lhs/rhs of
wenzelm@16234
  1953
definitions, equations, inequations etc., 'concl' printing only the
schirmer@17393
  1954
conclusion of a meta-logical statement theorem, and 'prem1' .. 'prem19'
wenzelm@16234
  1955
to print the specified premise.  TermStyle.add_style provides an ML
wenzelm@16234
  1956
interface for introducing further styles.  See also the "LaTeX Sugar"
wenzelm@17117
  1957
document practical applications.  The ML antiquotation prints
wenzelm@17117
  1958
type-checked ML expressions verbatim.
wenzelm@16234
  1959
wenzelm@17259
  1960
* Markup commands 'chapter', 'section', 'subsection', 'subsubsection',
wenzelm@17259
  1961
and 'text' support optional locale specification '(in loc)', which
wenzelm@17269
  1962
specifies the default context for interpreting antiquotations.  For
wenzelm@17269
  1963
example: 'text (in lattice) {* @{thm inf_assoc}*}'.
wenzelm@17259
  1964
wenzelm@17259
  1965
* Option 'locale=NAME' of antiquotations specifies an alternative
wenzelm@17259
  1966
context interpreting the subsequent argument.  For example: @{thm
wenzelm@17269
  1967
[locale=lattice] inf_assoc}.
wenzelm@17259
  1968
wenzelm@17097
  1969
* Proper output of proof terms (@{prf ...} and @{full_prf ...}) within
wenzelm@17097
  1970
a proof context.
wenzelm@17097
  1971
wenzelm@17097
  1972
* Proper output of antiquotations for theory commands involving a
wenzelm@17097
  1973
proof context (such as 'locale' or 'theorem (in loc) ...').
wenzelm@17097
  1974
wenzelm@17193
  1975
* Delimiters of outer tokens (string etc.) now produce separate LaTeX
wenzelm@17193
  1976
macros (\isachardoublequoteopen, isachardoublequoteclose etc.).
wenzelm@17193
  1977
wenzelm@17193
  1978
* isatool usedir: new option -C (default true) controls whether option
wenzelm@17193
  1979
-D should include a copy of the original document directory; -C false
wenzelm@17193
  1980
prevents unwanted effects such as copying of administrative CVS data.
wenzelm@17193
  1981
wenzelm@16234
  1982
wenzelm@16234
  1983
*** Pure ***
wenzelm@16234
  1984
wenzelm@16234
  1985
* Considerably improved version of 'constdefs' command.  Now performs
wenzelm@16234
  1986
automatic type-inference of declared constants; additional support for
wenzelm@16234
  1987
local structure declarations (cf. locales and HOL records), see also
wenzelm@16234
  1988
isar-ref manual.  Potential INCOMPATIBILITY: need to observe strictly
wenzelm@16234
  1989
sequential dependencies of definitions within a single 'constdefs'
wenzelm@16234
  1990
section; moreover, the declared name needs to be an identifier.  If
wenzelm@16234
  1991
all fails, consider to fall back on 'consts' and 'defs' separately.
wenzelm@16234
  1992
wenzelm@16234
  1993
* Improved indexed syntax and implicit structures.  First of all,
wenzelm@16234
  1994
indexed syntax provides a notational device for subscripted
wenzelm@16234
  1995
application, using the new syntax \<^bsub>term\<^esub> for arbitrary
wenzelm@16234
  1996
expressions.  Secondly, in a local context with structure
wenzelm@16234
  1997
declarations, number indexes \<^sub>n or the empty index (default
wenzelm@16234
  1998
number 1) refer to a certain fixed variable implicitly; option
wenzelm@16234
  1999
show_structs controls printing of implicit structures.  Typical
wenzelm@16234
  2000
applications of these concepts involve record types and locales.
wenzelm@16234
  2001
wenzelm@16234
  2002
* New command 'no_syntax' removes grammar declarations (and
wenzelm@16234
  2003
translations) resulting from the given syntax specification, which is
wenzelm@16234
  2004
interpreted in the same manner as for the 'syntax' command.
wenzelm@16234
  2005
wenzelm@16234
  2006
* 'Advanced' translation functions (parse_translation etc.) may depend
wenzelm@16234
  2007
on the signature of the theory context being presently used for
wenzelm@16234
  2008
parsing/printing, see also isar-ref manual.
wenzelm@16234
  2009
wenzelm@16856
  2010
* Improved 'oracle' command provides a type-safe interface to turn an
wenzelm@16856
  2011
ML expression of type theory -> T -> term into a primitive rule of
wenzelm@16856
  2012
type theory -> T -> thm (i.e. the functionality of Thm.invoke_oracle
wenzelm@16856
  2013
is already included here); see also FOL/ex/IffExample.thy;
wenzelm@16856
  2014
INCOMPATIBILITY.
wenzelm@16856
  2015
wenzelm@17275
  2016
* axclass: name space prefix for class "c" is now "c_class" (was "c"
wenzelm@17275
  2017
before); "cI" is no longer bound, use "c.intro" instead.
wenzelm@17275
  2018
INCOMPATIBILITY.  This change avoids clashes of fact bindings for
wenzelm@17275
  2019
axclasses vs. locales.
wenzelm@17275
  2020
wenzelm@16234
  2021
* Improved internal renaming of symbolic identifiers -- attach primes
wenzelm@16234
  2022
instead of base 26 numbers.
wenzelm@16234
  2023
wenzelm@16234
  2024
* New flag show_question_marks controls printing of leading question
wenzelm@16234
  2025
marks in schematic variable names.
wenzelm@16234
  2026
wenzelm@16234
  2027
* In schematic variable names, *any* symbol following \<^isub> or
wenzelm@16234
  2028
\<^isup> is now treated as part of the base name.  For example, the
wenzelm@16234
  2029
following works without printing of awkward ".0" indexes:
wenzelm@16234
  2030
wenzelm@16234
  2031
  lemma "x\<^isub>1 = x\<^isub>2 ==> x\<^isub>2 = x\<^isub>1"
wenzelm@16234
  2032
    by simp
wenzelm@16234
  2033
wenzelm@16234
  2034
* Inner syntax includes (*(*nested*) comments*).
wenzelm@16234
  2035
wenzelm@17548
  2036
* Pretty printer now supports unbreakable blocks, specified in mixfix
wenzelm@16234
  2037
annotations as "(00...)".
wenzelm@16234
  2038
wenzelm@16234
  2039
* Clear separation of logical types and nonterminals, where the latter
wenzelm@16234
  2040
may only occur in 'syntax' specifications or type abbreviations.
wenzelm@16234
  2041
Before that distinction was only partially implemented via type class
wenzelm@16234
  2042
"logic" vs. "{}".  Potential INCOMPATIBILITY in rare cases of improper
wenzelm@16234
  2043
use of 'types'/'consts' instead of 'nonterminals'/'syntax'.  Some very
wenzelm@16234
  2044
exotic syntax specifications may require further adaption
wenzelm@17691
  2045
(e.g. Cube/Cube.thy).
wenzelm@16234
  2046
wenzelm@16234
  2047
* Removed obsolete type class "logic", use the top sort {} instead.
wenzelm@16234
  2048
Note that non-logical types should be declared as 'nonterminals'
wenzelm@16234
  2049
rather than 'types'.  INCOMPATIBILITY for new object-logic
wenzelm@16234
  2050
specifications.
wenzelm@16234
  2051
ballarin@17095
  2052
* Attributes 'induct' and 'cases': type or set names may now be
ballarin@17095
  2053
locally fixed variables as well.
ballarin@17095
  2054
wenzelm@16234
  2055
* Simplifier: can now control the depth to which conditional rewriting
wenzelm@16234
  2056
is traced via the PG menu Isabelle -> Settings -> Trace Simp Depth
wenzelm@16234
  2057
Limit.
wenzelm@16234
  2058
wenzelm@16234
  2059
* Simplifier: simplification procedures may now take the current
wenzelm@16234
  2060
simpset into account (cf. Simplifier.simproc(_i) / mk_simproc
wenzelm@16234
  2061
interface), which is very useful for calling the Simplifier
wenzelm@16234
  2062
recursively.  Minor INCOMPATIBILITY: the 'prems' argument of simprocs
wenzelm@16234
  2063
is gone -- use prems_of_ss on the simpset instead.  Moreover, the
wenzelm@16234
  2064
low-level mk_simproc no longer applies Logic.varify internally, to
wenzelm@16234
  2065
allow for use in a context of fixed variables.
wenzelm@16234
  2066
wenzelm@16234
  2067
* thin_tac now works even if the assumption being deleted contains !!
wenzelm@16234
  2068
or ==>.  More generally, erule now works even if the major premise of
wenzelm@16234
  2069
the elimination rule contains !! or ==>.
wenzelm@16234
  2070
wenzelm@17597
  2071
* Method 'rules' has been renamed to 'iprover'. INCOMPATIBILITY.
nipkow@17590
  2072
wenzelm@16234
  2073
* Reorganized bootstrapping of the Pure theories; CPure is now derived
wenzelm@16234
  2074
from Pure, which contains all common declarations already.  Both
wenzelm@16234
  2075
theories are defined via plain Isabelle/Isar .thy files.
wenzelm@16234
  2076
INCOMPATIBILITY: elements of CPure (such as the CPure.intro /
wenzelm@16234
  2077
CPure.elim / CPure.dest attributes) now appear in the Pure name space;
wenzelm@16234
  2078
use isatool fixcpure to adapt your theory and ML sources.
wenzelm@16234
  2079
wenzelm@16234
  2080
* New syntax 'name(i-j, i-, i, ...)' for referring to specific
wenzelm@16234
  2081
selections of theorems in named facts via index ranges.
wenzelm@16234
  2082
wenzelm@17097
  2083
* 'print_theorems': in theory mode, really print the difference
wenzelm@17097
  2084
wrt. the last state (works for interactive theory development only),
wenzelm@17097
  2085
in proof mode print all local facts (cf. 'print_facts');
wenzelm@17097
  2086
wenzelm@17397
  2087
* 'hide': option '(open)' hides only base names.
wenzelm@17397
  2088
wenzelm@17275
  2089
* More efficient treatment of intermediate checkpoints in interactive
wenzelm@17275
  2090
theory development.
wenzelm@17275
  2091
berghofe@17663
  2092
* Code generator is now invoked via code_module (incremental code
wenzelm@17664
  2093
generation) and code_library (modular code generation, ML structures
wenzelm@17664
  2094
for each theory).  INCOMPATIBILITY: new keywords 'file' and 'contains'
wenzelm@17664
  2095
must be quoted when used as identifiers.
wenzelm@17664
  2096
wenzelm@17664
  2097
* New 'value' command for reading, evaluating and printing terms using
wenzelm@17664
  2098
the code generator.  INCOMPATIBILITY: command keyword 'value' must be
wenzelm@17664
  2099
quoted when used as identifier.
berghofe@17663
  2100
wenzelm@16234
  2101
wenzelm@16234
  2102
*** Locales ***
ballarin@17095
  2103
wenzelm@17385
  2104
* New commands for the interpretation of locale expressions in
wenzelm@17385
  2105
theories (1), locales (2) and proof contexts (3).  These generate
wenzelm@17385
  2106
proof obligations from the expression specification.  After the
wenzelm@17385
  2107
obligations have been discharged, theorems of the expression are added
wenzelm@17385
  2108
to the theory, target locale or proof context.  The synopsis of the
wenzelm@17385
  2109
commands is a follows:
wenzelm@17385
  2110
ballarin@17095
  2111
  (1) interpretation expr inst
ballarin@17095
  2112
  (2) interpretation target < expr
ballarin@17095
  2113
  (3) interpret expr inst
wenzelm@17385
  2114
ballarin@17095
  2115
Interpretation in theories and proof contexts require a parameter
ballarin@17095
  2116
instantiation of terms from the current context.  This is applied to
wenzelm@17385
  2117
specifications and theorems of the interpreted expression.
wenzelm@17385
  2118
Interpretation in locales only permits parameter renaming through the
wenzelm@17385
  2119
locale expression.  Interpretation is smart in that interpretations
wenzelm@17385
  2120
that are active already do not occur in proof obligations, neither are
wenzelm@17385
  2121
instantiated theorems stored in duplicate.  Use 'print_interps' to
wenzelm@17385
  2122
inspect active interpretations of a particular locale.  For details,
ballarin@17436
  2123
see the Isar Reference manual.  Examples can be found in
ballarin@17436
  2124
HOL/Finite_Set.thy and HOL/Algebra/UnivPoly.thy.
wenzelm@16234
  2125
wenzelm@16234
  2126
INCOMPATIBILITY: former 'instantiate' has been withdrawn, use
wenzelm@16234
  2127
'interpret' instead.
wenzelm@16234
  2128
wenzelm@17385
  2129
* New context element 'constrains' for adding type constraints to
wenzelm@17385
  2130
parameters.
wenzelm@17385
  2131
wenzelm@17385
  2132
* Context expressions: renaming of parameters with syntax
wenzelm@17385
  2133
redeclaration.
ballarin@17095
  2134
ballarin@17095
  2135
* Locale declaration: 'includes' disallowed.
ballarin@17095
  2136
wenzelm@16234
  2137
* Proper static binding of attribute syntax -- i.e. types / terms /
wenzelm@16234
  2138
facts mentioned as arguments are always those of the locale definition
wenzelm@16234
  2139
context, independently of the context of later invocations.  Moreover,
wenzelm@16234
  2140
locale operations (renaming and type / term instantiation) are applied
wenzelm@16234
  2141
to attribute arguments as expected.
wenzelm@16234
  2142
wenzelm@16234
  2143
INCOMPATIBILITY of the ML interface: always pass Attrib.src instead of
wenzelm@16234
  2144
actual attributes; rare situations may require Attrib.attribute to
wenzelm@16234
  2145
embed those attributes into Attrib.src that lack concrete syntax.
wenzelm@16234
  2146
Attribute implementations need to cooperate properly with the static
wenzelm@16234
  2147
binding mechanism.  Basic parsers Args.XXX_typ/term/prop and
wenzelm@16234
  2148
Attrib.XXX_thm etc. already do the right thing without further
wenzelm@16234
  2149
intervention.  Only unusual applications -- such as "where" or "of"
wenzelm@16234
  2150
(cf. src/Pure/Isar/attrib.ML), which process arguments depending both
wenzelm@16234
  2151
on the context and the facts involved -- may have to assign parsed
wenzelm@16234
  2152
values to argument tokens explicitly.
wenzelm@16234
  2153
wenzelm@16234
  2154
* Changed parameter management in theorem generation for long goal
wenzelm@16234
  2155
statements with 'includes'.  INCOMPATIBILITY: produces a different
wenzelm@16234
  2156
theorem statement in rare situations.
wenzelm@16234
  2157
ballarin@17228
  2158
* Locale inspection command 'print_locale' omits notes elements.  Use
ballarin@17228
  2159
'print_locale!' to have them included in the output.
ballarin@17228
  2160
wenzelm@16234
  2161
wenzelm@16234
  2162
*** Provers ***
wenzelm@16234
  2163
wenzelm@16234
  2164
* Provers/hypsubst.ML: improved version of the subst method, for
wenzelm@16234
  2165
single-step rewriting: it now works in bound variable contexts. New is
wenzelm@16234
  2166
'subst (asm)', for rewriting an assumption.  INCOMPATIBILITY: may
wenzelm@16234
  2167
rewrite a different subterm than the original subst method, which is
wenzelm@16234
  2168
still available as 'simplesubst'.
wenzelm@16234
  2169
wenzelm@16234
  2170
* Provers/quasi.ML: new transitivity reasoners for transitivity only
wenzelm@16234
  2171
and quasi orders.
wenzelm@16234
  2172
wenzelm@16234
  2173
* Provers/trancl.ML: new transitivity reasoner for transitive and
wenzelm@16234
  2174
reflexive-transitive closure of relations.
wenzelm@16234
  2175
wenzelm@16234
  2176
* Provers/blast.ML: new reference depth_limit to make blast's depth
wenzelm@16234
  2177
limit (previously hard-coded with a value of 20) user-definable.
wenzelm@16234
  2178
wenzelm@16234
  2179
* Provers/simplifier.ML has been moved to Pure, where Simplifier.setup
wenzelm@16234
  2180
is peformed already.  Object-logics merely need to finish their
wenzelm@16234
  2181
initial simpset configuration as before.  INCOMPATIBILITY.
wenzelm@15703
  2182
berghofe@15475
  2183
schirmer@14700
  2184
*** HOL ***
schirmer@14700
  2185
wenzelm@16234
  2186
* Symbolic syntax of Hilbert Choice Operator is now as follows:
wenzelm@14878
  2187
wenzelm@14878
  2188
  syntax (epsilon)
wenzelm@14878
  2189
    "_Eps" :: "[pttrn, bool] => 'a"    ("(3\<some>_./ _)" [0, 10] 10)
wenzelm@14878
  2190
wenzelm@16234
  2191
The symbol \<some> is displayed as the alternative epsilon of LaTeX
wenzelm@16234
  2192
and x-symbol; use option '-m epsilon' to get it actually printed.
wenzelm@16234
  2193
Moreover, the mathematically important symbolic identifier \<epsilon>
wenzelm@16234
  2194
becomes available as variable, constant etc.  INCOMPATIBILITY,
wenzelm@16234
  2195
wenzelm@16234
  2196
* "x > y" abbreviates "y < x" and "x >= y" abbreviates "y <= x".
wenzelm@16234
  2197
Similarly for all quantifiers: "ALL x > y" etc.  The x-symbol for >=
wenzelm@17371
  2198
is \<ge>. New transitivity rules have been added to HOL/Orderings.thy to
avigad@17016
  2199
support corresponding Isar calculations.
wenzelm@16234
  2200
wenzelm@16234
  2201
* "{x:A. P}" abbreviates "{x. x:A & P}", and similarly for "\<in>"
wenzelm@16234
  2202
instead of ":".
wenzelm@16234
  2203
wenzelm@16234
  2204
* theory SetInterval: changed the syntax for open intervals:
wenzelm@16234
  2205
wenzelm@16234
  2206
  Old       New
wenzelm@16234
  2207
  {..n(}    {..<n}
wenzelm@16234
  2208
  {)n..}    {n<..}
wenzelm@16234
  2209
  {m..n(}   {m..<n}
wenzelm@16234
  2210
  {)m..n}   {m<..n}
wenzelm@16234
  2211
  {)m..n(}  {m<..<n}
wenzelm@16234
  2212
wenzelm@16234
  2213
The old syntax is still supported but will disappear in the next
wenzelm@16234
  2214
release.  For conversion use the following Emacs search and replace
wenzelm@16234
  2215
patterns (these are not perfect but work quite well):
nipkow@15046
  2216
nipkow@15046
  2217
  {)\([^\.]*\)\.\.  ->  {\1<\.\.}
nipkow@15046
  2218
  \.\.\([^(}]*\)(}  ->  \.\.<\1}
nipkow@15046
  2219
wenzelm@17533
  2220
* Theory Commutative_Ring (in Library): method comm_ring for proving
wenzelm@17533
  2221
equalities in commutative rings; method 'algebra' provides a generic
wenzelm@17533
  2222
interface.
wenzelm@17389
  2223
wenzelm@17389
  2224
* Theory Finite_Set: changed the syntax for 'setsum', summation over
wenzelm@16234
  2225
finite sets: "setsum (%x. e) A", which used to be "\<Sum>x:A. e", is
wenzelm@17371
  2226
now either "SUM x:A. e" or "\<Sum>x \<in> A. e". The bound variable can
paulson@17189
  2227
be a tuple pattern.
wenzelm@16234
  2228
wenzelm@16234
  2229
Some new syntax forms are available:
wenzelm@16234
  2230
wenzelm@16234
  2231
  "\<Sum>x | P. e"      for     "setsum (%x. e) {x. P}"
wenzelm@16234
  2232
  "\<Sum>x = a..b. e"   for     "setsum (%x. e) {a..b}"
wenzelm@16234
  2233
  "\<Sum>x = a..<b. e"  for     "setsum (%x. e) {a..<b}"
wenzelm@16234
  2234
  "\<Sum>x < k. e"      for     "setsum (%x. e) {..<k}"
wenzelm@16234
  2235
wenzelm@16234
  2236
The latter form "\<Sum>x < k. e" used to be based on a separate
wenzelm@16234
  2237
function "Summation", which has been discontinued.
wenzelm@16234
  2238
wenzelm@16234
  2239
* theory Finite_Set: in structured induction proofs, the insert case
wenzelm@16234
  2240
is now 'case (insert x F)' instead of the old counterintuitive 'case
wenzelm@16234
  2241
(insert F x)'.
wenzelm@16234
  2242
wenzelm@16234
  2243
* The 'refute' command has been extended to support a much larger
wenzelm@16234
  2244
fragment of HOL, including axiomatic type classes, constdefs and
wenzelm@16234
  2245
typedefs, inductive datatypes and recursion.
wenzelm@16234
  2246
webertj@17700
  2247
* New tactics 'sat' and 'satx' to prove propositional tautologies.
webertj@17700
  2248
Requires zChaff with proof generation to be installed.  See
webertj@17700
  2249
HOL/ex/SAT_Examples.thy for examples.
webertj@17619
  2250
wenzelm@16234
  2251
* Datatype induction via method 'induct' now preserves the name of the
wenzelm@16234
  2252
induction variable. For example, when proving P(xs::'a list) by
wenzelm@16234
  2253
induction on xs, the induction step is now P(xs) ==> P(a#xs) rather
wenzelm@16234
  2254
than P(list) ==> P(a#list) as previously.  Potential INCOMPATIBILITY
wenzelm@16234
  2255
in unstructured proof scripts.
wenzelm@16234
  2256
wenzelm@16234
  2257
* Reworked implementation of records.  Improved scalability for
wenzelm@16234
  2258
records with many fields, avoiding performance problems for type
wenzelm@16234
  2259
inference. Records are no longer composed of nested field types, but
wenzelm@16234
  2260
of nested extension types. Therefore the record type only grows linear
wenzelm@16234
  2261
in the number of extensions and not in the number of fields.  The
wenzelm@16234
  2262
top-level (users) view on records is preserved.  Potential
wenzelm@16234
  2263
INCOMPATIBILITY only in strange cases, where the theory depends on the
wenzelm@16234
  2264
old record representation. The type generated for a record is called
wenzelm@16234
  2265
<record_name>_ext_type.
wenzelm@16234
  2266
wenzelm@16234
  2267
Flag record_quick_and_dirty_sensitive can be enabled to skip the
wenzelm@16234
  2268
proofs triggered by a record definition or a simproc (if
wenzelm@16234
  2269
quick_and_dirty is enabled).  Definitions of large records can take
wenzelm@16234
  2270
quite long.
wenzelm@16234
  2271
wenzelm@16234
  2272
New simproc record_upd_simproc for simplification of multiple record
wenzelm@16234
  2273
updates enabled by default.  Moreover, trivial updates are also
wenzelm@16234
  2274
removed: r(|x := x r|) = r.  INCOMPATIBILITY: old proofs break
wenzelm@16234
  2275
occasionally, since simplification is more powerful by default.
wenzelm@16234
  2276
wenzelm@17275
  2277
* typedef: proper support for polymorphic sets, which contain extra
wenzelm@17275
  2278
type-variables in the term.
wenzelm@17275
  2279
wenzelm@16234
  2280
* Simplifier: automatically reasons about transitivity chains
wenzelm@16234
  2281
involving "trancl" (r^+) and "rtrancl" (r^*) by setting up tactics
wenzelm@16234
  2282
provided by Provers/trancl.ML as additional solvers.  INCOMPATIBILITY:
wenzelm@16234
  2283
old proofs break occasionally as simplification may now solve more
wenzelm@16234
  2284
goals than previously.
wenzelm@16234
  2285
wenzelm@16234
  2286
* Simplifier: converts x <= y into x = y if assumption y <= x is
wenzelm@16234
  2287
present.  Works for all partial orders (class "order"), in particular
wenzelm@16234
  2288
numbers and sets.  For linear orders (e.g. numbers) it treats ~ x < y
wenzelm@16234
  2289
just like y <= x.
wenzelm@16234
  2290
wenzelm@16234
  2291
* Simplifier: new simproc for "let x = a in f x".  If a is a free or
wenzelm@16234
  2292
bound variable or a constant then the let is unfolded.  Otherwise
wenzelm@16234
  2293
first a is simplified to b, and then f b is simplified to g. If
wenzelm@16234
  2294
possible we abstract b from g arriving at "let x = b in h x",
wenzelm@16234
  2295
otherwise we unfold the let and arrive at g.  The simproc can be
wenzelm@16234
  2296
enabled/disabled by the reference use_let_simproc.  Potential
wenzelm@16234
  2297
INCOMPATIBILITY since simplification is more powerful by default.
webertj@15776
  2298
paulson@16563
  2299
* Classical reasoning: the meson method now accepts theorems as arguments.
paulson@16563
  2300
paulson@17595
  2301
* Prover support: pre-release of the Isabelle-ATP linkup, which runs background
paulson@17595
  2302
jobs to provide advice on the provability of subgoals.
paulson@17595
  2303
wenzelm@16891
  2304
* Theory OrderedGroup and Ring_and_Field: various additions and
wenzelm@16891
  2305
improvements to faciliate calculations involving equalities and
wenzelm@16891
  2306
inequalities.
wenzelm@16891
  2307
wenzelm@16891
  2308
The following theorems have been eliminated or modified
wenzelm@16891
  2309
(INCOMPATIBILITY):
avigad@16888
  2310
avigad@16888
  2311
  abs_eq             now named abs_of_nonneg
wenzelm@17371
  2312
  abs_of_ge_0        now named abs_of_nonneg
wenzelm@17371
  2313
  abs_minus_eq       now named abs_of_nonpos
avigad@16888
  2314
  imp_abs_id         now named abs_of_nonneg
avigad@16888
  2315
  imp_abs_neg_id     now named abs_of_nonpos
avigad@16888
  2316
  mult_pos           now named mult_pos_pos
avigad@16888
  2317
  mult_pos_le        now named mult_nonneg_nonneg
avigad@16888
  2318
  mult_pos_neg_le    now named mult_nonneg_nonpos
avigad@16888
  2319
  mult_pos_neg2_le   now named mult_nonneg_nonpos2
avigad@16888
  2320
  mult_neg           now named mult_neg_neg
avigad@16888
  2321
  mult_neg_le        now named mult_nonpos_nonpos
avigad@16888
  2322
obua@23495
  2323
* The following lemmas in Ring_and_Field have been added to the simplifier:
obua@23495
  2324
     
obua@23495
  2325
     zero_le_square
obua@23495
  2326
     not_square_less_zero 
obua@23495
  2327
obua@23495
  2328
  The following lemmas have been deleted from Real/RealPow:
obua@23495
  2329
  
obua@23495
  2330
     realpow_zero_zero
obua@23495
  2331
     realpow_two
obua@23495
  2332
     realpow_less
obua@23495
  2333
     zero_le_power
obua@23495
  2334
     realpow_two_le
obua@23495
  2335
     abs_realpow_two
obua@23495
  2336
     realpow_two_abs     
obua@23495
  2337
wenzelm@16891
  2338
* Theory Parity: added rules for simplifying exponents.
wenzelm@16891
  2339
nipkow@17092
  2340
* Theory List:
nipkow@17092
  2341
nipkow@17092
  2342
The following theorems have been eliminated or modified
nipkow@17092
  2343
(INCOMPATIBILITY):
nipkow@17092
  2344
nipkow@17092
  2345
  list_all_Nil       now named list_all.simps(1)
nipkow@17092
  2346
  list_all_Cons      now named list_all.simps(2)
nipkow@17092
  2347
  list_all_conv      now named list_all_iff
nipkow@17092
  2348
  set_mem_eq         now named mem_iff
nipkow@17092
  2349
wenzelm@16929
  2350
* Theories SetsAndFunctions and BigO (see HOL/Library) support
wenzelm@16929
  2351
asymptotic "big O" calculations.  See the notes in BigO.thy.
wenzelm@16929
  2352
avigad@16888
  2353
avigad@16888
  2354
*** HOL-Complex ***
avigad@16888
  2355
wenzelm@16891
  2356
* Theory RealDef: better support for embedding natural numbers and
wenzelm@16891
  2357
integers in the reals.
wenzelm@16891
  2358
wenzelm@16891
  2359
The following theorems have been eliminated or modified
wenzelm@16891
  2360
(INCOMPATIBILITY):
wenzelm@16891
  2361
avigad@17016
  2362
  exp_ge_add_one_self  now requires no hypotheses
avigad@17016
  2363
  real_of_int_add      reversed direction of equality (use [symmetric])
avigad@17016
  2364
  real_of_int_minus    reversed direction of equality (use [symmetric])
avigad@17016
  2365
  real_of_int_diff     reversed direction of equality (use [symmetric])
avigad@17016
  2366
  real_of_int_mult     reversed direction of equality (use [symmetric])
wenzelm@16891
  2367
wenzelm@16891
  2368
* Theory RComplete: expanded support for floor and ceiling functions.
avigad@16888
  2369
avigad@16962
  2370
* Theory Ln is new, with properties of the natural logarithm
avigad@16962
  2371
wenzelm@17423
  2372
* Hyperreal: There is a new type constructor "star" for making
wenzelm@17423
  2373
nonstandard types.  The old type names are now type synonyms:
wenzelm@17423
  2374
wenzelm@17423
  2375
  hypreal = real star
wenzelm@17423
  2376
  hypnat = nat star
wenzelm@17423
  2377
  hcomplex = complex star
wenzelm@17423
  2378
wenzelm@17423
  2379
* Hyperreal: Many groups of similarly-defined constants have been
huffman@17442
  2380
replaced by polymorphic versions (INCOMPATIBILITY):
wenzelm@17423
  2381
wenzelm@17423
  2382
  star_of <-- hypreal_of_real, hypnat_of_nat, hcomplex_of_complex
wenzelm@17423
  2383
wenzelm@17423
  2384
  starset      <-- starsetNat, starsetC
wenzelm@17423
  2385
  *s*          <-- *sNat*, *sc*
wenzelm@17423
  2386
  starset_n    <-- starsetNat_n, starsetC_n
wenzelm@17423
  2387
  *sn*         <-- *sNatn*, *scn*
wenzelm@17423
  2388
  InternalSets <-- InternalNatSets, InternalCSets
wenzelm@17423
  2389
huffman@17442
  2390
  starfun      <-- starfun{Nat,Nat2,C,RC,CR}
wenzelm@17423
  2391
  *f*          <-- *fNat*, *fNat2*, *fc*, *fRc*, *fcR*
huffman@17442
  2392
  starfun_n    <-- starfun{Nat,Nat2,C,RC,CR}_n
wenzelm@17423
  2393
  *fn*         <-- *fNatn*, *fNat2n*, *fcn*, *fRcn*, *fcRn*
huffman@17442
  2394
  InternalFuns <-- InternalNatFuns, InternalNatFuns2, Internal{C,RC,CR}Funs
wenzelm@17423
  2395
wenzelm@17423
  2396
* Hyperreal: Many type-specific theorems have been removed in favor of
huffman@17442
  2397
theorems specific to various axiomatic type classes (INCOMPATIBILITY):
huffman@17442
  2398
huffman@17442
  2399
  add_commute <-- {hypreal,hypnat,hcomplex}_add_commute
huffman@17442
  2400
  add_assoc   <-- {hypreal,hypnat,hcomplex}_add_assocs
huffman@17442
  2401
  OrderedGroup.add_0 <-- {hypreal,hypnat,hcomplex}_add_zero_left
huffman@17442
  2402
  OrderedGroup.add_0_right <-- {hypreal,hcomplex}_add_zero_right
wenzelm@17423
  2403
  right_minus <-- hypreal_add_minus
huffman@17442
  2404
  left_minus <-- {hypreal,hcomplex}_add_minus_left
huffman@17442
  2405
  mult_commute <-- {hypreal,hypnat,hcomplex}_mult_commute
huffman@17442
  2406
  mult_assoc <-- {hypreal,hypnat,hcomplex}_mult_assoc
huffman@17442
  2407
  mult_1_left <-- {hypreal,hypnat}_mult_1, hcomplex_mult_one_left
wenzelm@17423
  2408
  mult_1_right <-- hcomplex_mult_one_right
wenzelm@17423
  2409
  mult_zero_left <-- hcomplex_mult_zero_left
huffman@17442
  2410
  left_distrib <-- {hypreal,hypnat,hcomplex}_add_mult_distrib
wenzelm@17423
  2411
  right_distrib <-- hypnat_add_mult_distrib2
huffman@17442
  2412
  zero_neq_one <-- {hypreal,hypnat,hcomplex}_zero_not_eq_one
wenzelm@17423
  2413
  right_inverse <-- hypreal_mult_inverse
wenzelm@17423
  2414
  left_inverse <-- hypreal_mult_inverse_left, hcomplex_mult_inv_left
huffman@17442
  2415
  order_refl <-- {hypreal,hypnat}_le_refl
huffman@17442
  2416
  order_trans <-- {hypreal,hypnat}_le_trans
huffman@17442
  2417
  order_antisym <-- {hypreal,hypnat}_le_anti_sym
huffman@17442
  2418
  order_less_le <-- {hypreal,hypnat}_less_le
huffman@17442
  2419
  linorder_linear <-- {hypreal,hypnat}_le_linear
huffman@17442
  2420
  add_left_mono <-- {hypreal,hypnat}_add_left_mono
huffman@17442
  2421
  mult_strict_left_mono <-- {hypreal,hypnat}_mult_less_mono2
wenzelm@17423
  2422
  add_nonneg_nonneg <-- hypreal_le_add_order
wenzelm@17423
  2423
wenzelm@17423
  2424
* Hyperreal: Separate theorems having to do with type-specific
wenzelm@17423
  2425
versions of constants have been merged into theorems that apply to the
huffman@17442
  2426
new polymorphic constants (INCOMPATIBILITY):
huffman@17442
  2427
huffman@17442
  2428
  STAR_UNIV_set <-- {STAR_real,NatStar_real,STARC_complex}_set
huffman@17442
  2429
  STAR_empty_set <-- {STAR,NatStar,STARC}_empty_set
huffman@17442
  2430
  STAR_Un <-- {STAR,NatStar,STARC}_Un
huffman@17442
  2431
  STAR_Int <-- {STAR,NatStar,STARC}_Int
huffman@17442
  2432
  STAR_Compl <-- {STAR,NatStar,STARC}_Compl
huffman@17442
  2433
  STAR_subset <-- {STAR,NatStar,STARC}_subset
huffman@17442
  2434
  STAR_mem <-- {STAR,NatStar,STARC}_mem
huffman@17442
  2435
  STAR_mem_Compl <-- {STAR,STARC}_mem_Compl
huffman@17442
  2436
  STAR_diff <-- {STAR,STARC}_diff
huffman@17442
  2437
  STAR_star_of_image_subset <-- {STAR_hypreal_of_real, NatStar_hypreal_of_real,
huffman@17442
  2438
    STARC_hcomplex_of_complex}_image_subset
huffman@17442
  2439
  starset_n_Un <-- starset{Nat,C}_n_Un
huffman@17442
  2440
  starset_n_Int <-- starset{Nat,C}_n_Int
huffman@17442
  2441
  starset_n_Compl <-- starset{Nat,C}_n_Compl
huffman@17442
  2442
  starset_n_diff <-- starset{Nat,C}_n_diff
huffman@17442
  2443
  InternalSets_Un <-- Internal{Nat,C}Sets_Un
huffman@17442
  2444
  InternalSets_Int <-- Internal{Nat,C}Sets_Int
huffman@17442
  2445
  InternalSets_Compl <-- Internal{Nat,C}Sets_Compl
huffman@17442
  2446
  InternalSets_diff <-- Internal{Nat,C}Sets_diff
huffman@17442
  2447
  InternalSets_UNIV_diff <-- Internal{Nat,C}Sets_UNIV_diff
huffman@17442
  2448
  InternalSets_starset_n <-- Internal{Nat,C}Sets_starset{Nat,C}_n
huffman@17442
  2449
  starset_starset_n_eq <-- starset{Nat,C}_starset{Nat,C}_n_eq
huffman@17442
  2450
  starset_n_starset <-- starset{Nat,C}_n_starset{Nat,C}
huffman@17442
  2451
  starfun_n_starfun <-- starfun{Nat,Nat2,C,RC,CR}_n_starfun{Nat,Nat2,C,RC,CR}
huffman@17442
  2452
  starfun <-- starfun{Nat,Nat2,C,RC,CR}
huffman@17442
  2453
  starfun_mult <-- starfun{Nat,Nat2,C,RC,CR}_mult
huffman@17442
  2454
  starfun_add <-- starfun{Nat,Nat2,C,RC,CR}_add
huffman@17442
  2455
  starfun_minus <-- starfun{Nat,Nat2,C,RC,CR}_minus
huffman@17442
  2456
  starfun_diff <-- starfun{C,RC,CR}_diff
huffman@17442
  2457
  starfun_o <-- starfun{NatNat2,Nat2,_stafunNat,C,C_starfunRC,_starfunCR}_o
huffman@17442
  2458
  starfun_o2 <-- starfun{NatNat2,_stafunNat,C,C_starfunRC,_starfunCR}_o2
huffman@17442
  2459
  starfun_const_fun <-- starfun{Nat,Nat2,C,RC,CR}_const_fun
huffman@17442
  2460
  starfun_inverse <-- starfun{Nat,C,RC,CR}_inverse
huffman@17442
  2461
  starfun_eq <-- starfun{Nat,Nat2,C,RC,CR}_eq
huffman@17442
  2462
  starfun_eq_iff <-- starfun{C,RC,CR}_eq_iff
wenzelm@17423
  2463
  starfun_Id <-- starfunC_Id
huffman@17442
  2464
  starfun_approx <-- starfun{Nat,CR}_approx
huffman@17442
  2465
  starfun_capprox <-- starfun{C,RC}_capprox
wenzelm@17423
  2466
  starfun_abs <-- starfunNat_rabs
huffman@17442
  2467
  starfun_lambda_cancel <-- starfun{C,CR,RC}_lambda_cancel
huffman@17442
  2468
  starfun_lambda_cancel2 <-- starfun{C,CR,RC}_lambda_cancel2
wenzelm@17423
  2469
  starfun_mult_HFinite_approx <-- starfunCR_mult_HFinite_capprox
huffman@17442
  2470
  starfun_mult_CFinite_capprox <-- starfun{C,RC}_mult_CFinite_capprox
huffman@17442
  2471
  starfun_add_capprox <-- starfun{C,RC}_add_capprox
wenzelm@17423
  2472
  starfun_add_approx <-- starfunCR_add_approx
wenzelm@17423
  2473
  starfun_inverse_inverse <-- starfunC_inverse_inverse
huffman@17442
  2474
  starfun_divide <-- starfun{C,CR,RC}_divide
huffman@17442
  2475
  starfun_n <-- starfun{Nat,C}_n
huffman@17442
  2476
  starfun_n_mult <-- starfun{Nat,C}_n_mult
huffman@17442
  2477
  starfun_n_add <-- starfun{Nat,C}_n_add
wenzelm@17423
  2478
  starfun_n_add_minus <-- starfunNat_n_add_minus
huffman@17442
  2479
  starfun_n_const_fun <-- starfun{Nat,C}_n_const_fun
huffman@17442
  2480
  starfun_n_minus <-- starfun{Nat,C}_n_minus
huffman@17442
  2481
  starfun_n_eq <-- starfun{Nat,C}_n_eq
huffman@17442
  2482
huffman@17442
  2483
  star_n_add <-- {hypreal,hypnat,hcomplex}_add
huffman@17442
  2484
  star_n_minus <-- {hypreal,hcomplex}_minus
huffman@17442
  2485
  star_n_diff <-- {hypreal,hcomplex}_diff
huffman@17442
  2486
  star_n_mult <-- {hypreal,hcomplex}_mult
huffman@17442
  2487
  star_n_inverse <-- {hypreal,hcomplex}_inverse
huffman@17442
  2488
  star_n_le <-- {hypreal,hypnat}_le
huffman@17442
  2489
  star_n_less <-- {hypreal,hypnat}_less
huffman@17442
  2490
  star_n_zero_num <-- {hypreal,hypnat,hcomplex}_zero_num
huffman@17442
  2491
  star_n_one_num <-- {hypreal,hypnat,hcomplex}_one_num
wenzelm@17423
  2492
  star_n_abs <-- hypreal_hrabs
wenzelm@17423
  2493
  star_n_divide <-- hcomplex_divide
wenzelm@17423
  2494
huffman@17442
  2495
  star_of_add <-- {hypreal_of_real,hypnat_of_nat,hcomplex_of_complex}_add
huffman@17442
  2496
  star_of_minus <-- {hypreal_of_real,hcomplex_of_complex}_minus
wenzelm@17423
  2497
  star_of_diff <-- hypreal_of_real_diff
huffman@17442
  2498
  star_of_mult <-- {hypreal_of_real,hypnat_of_nat,hcomplex_of_complex}_mult
huffman@17442
  2499
  star_of_one <-- {hypreal_of_real,hcomplex_of_complex}_one
huffman@17442
  2500
  star_of_zero <-- {hypreal_of_real,hypnat_of_nat,hcomplex_of_complex}_zero
huffman@17442
  2501
  star_of_le <-- {hypreal_of_real,hypnat_of_nat}_le_iff
huffman@17442
  2502
  star_of_less <-- {hypreal_of_real,hypnat_of_nat}_less_iff
huffman@17442
  2503
  star_of_eq <-- {hypreal_of_real,hypnat_of_nat,hcomplex_of_complex}_eq_iff
huffman@17442
  2504
  star_of_inverse <-- {hypreal_of_real,hcomplex_of_complex}_inverse
huffman@17442
  2505
  star_of_divide <-- {hypreal_of_real,hcomplex_of_complex}_divide
huffman@17442
  2506
  star_of_of_nat <-- {hypreal_of_real,hcomplex_of_complex}_of_nat
huffman@17442
  2507
  star_of_of_int <-- {hypreal_of_real,hcomplex_of_complex}_of_int
huffman@17442
  2508
  star_of_number_of <-- {hypreal,hcomplex}_number_of
wenzelm@17423
  2509
  star_of_number_less <-- number_of_less_hypreal_of_real_iff
wenzelm@17423
  2510
  star_of_number_le <-- number_of_le_hypreal_of_real_iff
wenzelm@17423
  2511
  star_of_eq_number <-- hypreal_of_real_eq_number_of_iff
wenzelm@17423
  2512
  star_of_less_number <-- hypreal_of_real_less_number_of_iff
wenzelm@17423
  2513
  star_of_le_number <-- hypreal_of_real_le_number_of_iff
wenzelm@17423
  2514
  star_of_power <-- hypreal_of_real_power
wenzelm@17423
  2515
  star_of_eq_0 <-- hcomplex_of_complex_zero_iff
wenzelm@17423
  2516
huffman@17442
  2517
* Hyperreal: new method "transfer" that implements the transfer
huffman@17442
  2518
principle of nonstandard analysis. With a subgoal that mentions
huffman@17442
  2519
nonstandard types like "'a star", the command "apply transfer"
huffman@17442
  2520
replaces it with an equivalent one that mentions only standard types.
huffman@17442
  2521
To be successful, all free variables must have standard types; non-
huffman@17442
  2522
standard variables must have explicit universal quantifiers.
huffman@17442
  2523
wenzelm@17641
  2524
* Hyperreal: A theory of Taylor series.
wenzelm@17641
  2525
wenzelm@14655
  2526
wenzelm@14682
  2527
*** HOLCF ***
wenzelm@14682
  2528
wenzelm@17533
  2529
* Discontinued special version of 'constdefs' (which used to support
wenzelm@17533
  2530
continuous functions) in favor of the general Pure one with full
wenzelm@17533
  2531
type-inference.
wenzelm@17533
  2532
wenzelm@17533
  2533
* New simplification procedure for solving continuity conditions; it
wenzelm@17533
  2534
is much faster on terms with many nested lambda abstractions (cubic
huffman@17442
  2535
instead of exponential time).
huffman@17442
  2536
wenzelm@17533
  2537
* New syntax for domain package: selector names are now optional.
huffman@17442
  2538
Parentheses should be omitted unless argument is lazy, for example:
huffman@17442
  2539
huffman@17442
  2540
  domain 'a stream = cons "'a" (lazy "'a stream")
huffman@17442
  2541
wenzelm@17533
  2542
* New command 'fixrec' for defining recursive functions with pattern
wenzelm@17533
  2543
matching; defining multiple functions with mutual recursion is also
wenzelm@17533
  2544
supported.  Patterns may include the constants cpair, spair, up, sinl,
wenzelm@17533
  2545
sinr, or any data constructor defined by the domain package. The given
wenzelm@17533
  2546
equations are proven as rewrite rules. See HOLCF/ex/Fixrec_ex.thy for
wenzelm@17533
  2547
syntax and examples.
wenzelm@17533
  2548
wenzelm@17533
  2549
* New commands 'cpodef' and 'pcpodef' for defining predicate subtypes
wenzelm@17533
  2550
of cpo and pcpo types. Syntax is exactly like the 'typedef' command,
wenzelm@17533
  2551
but the proof obligation additionally includes an admissibility
wenzelm@17533
  2552
requirement. The packages generate instances of class cpo or pcpo,
wenzelm@17533
  2553
with continuity and strictness theorems for Rep and Abs.
huffman@17442
  2554
huffman@17584
  2555
* HOLCF: Many theorems have been renamed according to a more standard naming
huffman@17584
  2556
scheme (INCOMPATIBILITY):
huffman@17584
  2557
huffman@17584
  2558
  foo_inject:  "foo$x = foo$y ==> x = y"
huffman@17584
  2559
  foo_eq:      "(foo$x = foo$y) = (x = y)"
huffman@17584
  2560
  foo_less:    "(foo$x << foo$y) = (x << y)"
huffman@17584
  2561
  foo_strict:  "foo$UU = UU"
huffman@17584
  2562
  foo_defined: "... ==> foo$x ~= UU"
huffman@17584
  2563
  foo_defined_iff: "(foo$x = UU) = (x = UU)"
huffman@17584
  2564
wenzelm@14682
  2565
paulson@14885
  2566
*** ZF ***
paulson@14885
  2567
wenzelm@16234
  2568
* ZF/ex: theories Group and Ring provide examples in abstract algebra,
wenzelm@16234
  2569
including the First Isomorphism Theorem (on quotienting by the kernel
wenzelm@16234
  2570
of a homomorphism).
wenzelm@15089
  2571
wenzelm@15089
  2572
* ZF/Simplifier: install second copy of type solver that actually
wenzelm@16234
  2573
makes use of TC rules declared to Isar proof contexts (or locales);
wenzelm@16234
  2574
the old version is still required for ML proof scripts.
wenzelm@15703
  2575
wenzelm@15703
  2576
wenzelm@17445
  2577
*** Cube ***
wenzelm@17445
  2578
wenzelm@17445
  2579
* Converted to Isar theory format; use locales instead of axiomatic
wenzelm@17445
  2580
theories.
wenzelm@17445
  2581
wenzelm@17445
  2582
wenzelm@15703
  2583
*** ML ***
wenzelm@15703
  2584
haftmann@21339
  2585
* Pure/library.ML: added ##>, ##>>, #>> -- higher-order counterparts
haftmann@21339
  2586
for ||>, ||>>, |>>,
haftmann@21339
  2587
wenzelm@15973
  2588
* Pure/library.ML no longer defines its own option datatype, but uses
wenzelm@16234
  2589
that of the SML basis, which has constructors NONE and SOME instead of
wenzelm@16234
  2590
None and Some, as well as exception Option.Option instead of OPTION.
wenzelm@16234
  2591
The functions the, if_none, is_some, is_none have been adapted
wenzelm@16234
  2592
accordingly, while Option.map replaces apsome.
wenzelm@15973
  2593
wenzelm@16860
  2594
* Pure/library.ML: the exception LIST has been given up in favour of
wenzelm@16860
  2595
the standard exceptions Empty and Subscript, as well as
wenzelm@16860
  2596
Library.UnequalLengths.  Function like Library.hd and Library.tl are
wenzelm@16860
  2597
superceded by the standard hd and tl functions etc.
wenzelm@16860
  2598
wenzelm@16860
  2599
A number of basic list functions are no longer exported to the ML
wenzelm@16860
  2600
toplevel, as they are variants of predefined functions.  The following
wenzelm@16234
  2601
suggests how one can translate existing code:
wenzelm@15973
  2602
wenzelm@15973
  2603
    rev_append xs ys = List.revAppend (xs, ys)
wenzelm@15973
  2604
    nth_elem (i, xs) = List.nth (xs, i)
wenzelm@15973
  2605
    last_elem xs = List.last xs
wenzelm@15973
  2606
    flat xss = List.concat xss
wenzelm@16234
  2607
    seq fs = List.app fs
wenzelm@15973
  2608
    partition P xs = List.partition P xs
wenzelm@15973
  2609
    mapfilter f xs = List.mapPartial f xs
wenzelm@15973
  2610
wenzelm@16860
  2611
* Pure/library.ML: several combinators for linear functional
wenzelm@16860
  2612
transformations, notably reverse application and composition:
wenzelm@16860
  2613
wenzelm@17371
  2614
  x |> f                f #> g
wenzelm@17371
  2615
  (x, y) |-> f          f #-> g
wenzelm@16860
  2616
haftmann@17495
  2617
* Pure/library.ML: introduced/changed precedence of infix operators:
haftmann@17495
  2618
haftmann@17495
  2619
  infix 1 |> |-> ||> ||>> |>> |>>> #> #->;
haftmann@17495
  2620
  infix 2 ?;
haftmann@17495
  2621
  infix 3 o oo ooo oooo;
haftmann@17495
  2622
  infix 4 ~~ upto downto;