NEWS
author wenzelm
Thu Sep 15 20:24:53 2005 +0200 (2005-09-15)
changeset 17423 de6b33a4efda
parent 17408 551c9a4dd693
child 17425 67c84a7d29f7
permissions -rw-r--r--
incorporated HOL/Hyperreal/CHANGES;
wenzelm@5363
     1
Isabelle NEWS -- history user-relevant changes
wenzelm@5363
     2
==============================================
wenzelm@2553
     3
wenzelm@17398
     4
New in Isabelle2005 (September 2005)
wenzelm@17398
     5
------------------------------------
wenzelm@14655
     6
wenzelm@14655
     7
*** General ***
wenzelm@14655
     8
nipkow@15130
     9
* Theory headers: the new header syntax for Isar theories is
nipkow@15130
    10
nipkow@15130
    11
  theory <name>
wenzelm@16234
    12
  imports <theory1> ... <theoryN>
wenzelm@16234
    13
  uses <file1> ... <fileM>
nipkow@15130
    14
  begin
nipkow@15130
    15
wenzelm@16234
    16
where the 'uses' part is optional.  The previous syntax
wenzelm@16234
    17
wenzelm@16234
    18
  theory <name> = <theory1> + ... + <theoryN>:
wenzelm@16234
    19
wenzelm@16717
    20
will disappear in the next release.  Use isatool fixheaders to convert
wenzelm@16717
    21
existing theory files.  Note that there is no change in ancient
wenzelm@17371
    22
non-Isar theories now, but these will disappear soon.
nipkow@15130
    23
berghofe@15475
    24
* Theory loader: parent theories can now also be referred to via
wenzelm@16234
    25
relative and absolute paths.
wenzelm@16234
    26
wenzelm@17408
    27
* Command 'find_theorems' searches for a list of criteria instead of a
wenzelm@17408
    28
list of constants. Known criteria are: intro, elim, dest, name:string,
wenzelm@17408
    29
simp:term, and any term. Criteria can be preceded by '-' to select
wenzelm@17408
    30
theorems that do not match. Intro, elim, dest select theorems that
wenzelm@17408
    31
match the current goal, name:s selects theorems whose fully qualified
wenzelm@17408
    32
name contain s, and simp:term selects all simplification rules whose
wenzelm@17408
    33
lhs match term.  Any other term is interpreted as pattern and selects
wenzelm@17408
    34
all theorems matching the pattern. Available in ProofGeneral under
wenzelm@17408
    35
'ProofGeneral -> Find Theorems' or C-c C-f.  Example:
wenzelm@16234
    36
wenzelm@17275
    37
  C-c C-f (100) "(_::nat) + _ + _" intro -name: "HOL."
wenzelm@16234
    38
wenzelm@16234
    39
prints the last 100 theorems matching the pattern "(_::nat) + _ + _",
wenzelm@16234
    40
matching the current goal as introduction rule and not having "HOL."
wenzelm@16234
    41
in their name (i.e. not being defined in theory HOL).
wenzelm@16013
    42
wenzelm@17408
    43
* Command 'thms_containing' has been discontinued in favour of
wenzelm@17408
    44
'find_theorems'; INCOMPATIBILITY.
wenzelm@17408
    45
wenzelm@17385
    46
* Communication with Proof General is now 8bit clean, which means that
wenzelm@17385
    47
Unicode text in UTF-8 encoding may be used within theory texts (both
wenzelm@17408
    48
formal and informal parts).  Cf. option -U of the Isabelle Proof
wenzelm@17408
    49
General interface; HOL/ex/Hebrew.thy provides a simple example.
wenzelm@17385
    50
wenzelm@15703
    51
wenzelm@15703
    52
*** Document preparation ***
wenzelm@15703
    53
wenzelm@16234
    54
* Commands 'display_drafts' and 'print_drafts' perform simple output
wenzelm@16234
    55
of raw sources.  Only those symbols that do not require additional
wenzelm@16234
    56
LaTeX packages (depending on comments in isabellesym.sty) are
wenzelm@16234
    57
displayed properly, everything else is left verbatim.  isatool display
wenzelm@16234
    58
and isatool print are used as front ends (these are subject to the
wenzelm@16234
    59
DVI/PDF_VIEWER and PRINT_COMMAND settings, respectively).
wenzelm@16234
    60
wenzelm@17047
    61
* Command tags control specific markup of certain regions of text,
wenzelm@17047
    62
notably folding and hiding.  Predefined tags include "theory" (for
wenzelm@17047
    63
theory begin and end), "proof" for proof commands, and "ML" for
wenzelm@17047
    64
commands involving ML code; the additional tags "visible" and
wenzelm@17047
    65
"invisible" are unused by default.  Users may give explicit tag
wenzelm@17047
    66
specifications in the text, e.g. ''by %invisible (auto)''.  The
wenzelm@17047
    67
interpretation of tags is determined by the LaTeX job during document
wenzelm@17047
    68
preparation: see option -V of isatool usedir, or options -n and -t of
wenzelm@17047
    69
isatool document, or even the LaTeX macros \isakeeptag, \isafoldtag,
wenzelm@17047
    70
\isadroptag.
wenzelm@17047
    71
wenzelm@17047
    72
Several document versions may be produced at the same time via isatool
wenzelm@17047
    73
usedir (the generated index.html will link all of them).  Typical
wenzelm@17047
    74
specifications include ''-V document=theory,proof,ML'' to present
wenzelm@17047
    75
theory/proof/ML parts faithfully, ''-V outline=/proof,/ML'' to fold
wenzelm@17047
    76
proof and ML commands, and ''-V mutilated=-theory,-proof,-ML'' to omit
wenzelm@17047
    77
these parts without any formal replacement text.  The Isabelle site
wenzelm@17047
    78
default settings produce ''document'' and ''outline'' versions as
wenzelm@17047
    79
specified above.
wenzelm@16234
    80
haftmann@17402
    81
* Several new antiquotations:
wenzelm@15979
    82
wenzelm@15979
    83
  @{term_type term} prints a term with its type annotated;
wenzelm@15979
    84
wenzelm@15979
    85
  @{typeof term} prints the type of a term;
wenzelm@15979
    86
wenzelm@16234
    87
  @{const const} is the same as @{term const}, but checks that the
wenzelm@16234
    88
  argument is a known logical constant;
wenzelm@15979
    89
wenzelm@15979
    90
  @{term_style style term} and @{thm_style style thm} print a term or
wenzelm@16234
    91
  theorem applying a "style" to it
wenzelm@16234
    92
wenzelm@17117
    93
  @{ML text}
wenzelm@17117
    94
wenzelm@16234
    95
Predefined styles are 'lhs' and 'rhs' printing the lhs/rhs of
wenzelm@16234
    96
definitions, equations, inequations etc., 'concl' printing only the
schirmer@17393
    97
conclusion of a meta-logical statement theorem, and 'prem1' .. 'prem19'
wenzelm@16234
    98
to print the specified premise.  TermStyle.add_style provides an ML
wenzelm@16234
    99
interface for introducing further styles.  See also the "LaTeX Sugar"
wenzelm@17117
   100
document practical applications.  The ML antiquotation prints
wenzelm@17117
   101
type-checked ML expressions verbatim.
wenzelm@16234
   102
wenzelm@17259
   103
* Markup commands 'chapter', 'section', 'subsection', 'subsubsection',
wenzelm@17259
   104
and 'text' support optional locale specification '(in loc)', which
wenzelm@17269
   105
specifies the default context for interpreting antiquotations.  For
wenzelm@17269
   106
example: 'text (in lattice) {* @{thm inf_assoc}*}'.
wenzelm@17259
   107
wenzelm@17259
   108
* Option 'locale=NAME' of antiquotations specifies an alternative
wenzelm@17259
   109
context interpreting the subsequent argument.  For example: @{thm
wenzelm@17269
   110
[locale=lattice] inf_assoc}.
wenzelm@17259
   111
wenzelm@17097
   112
* Proper output of proof terms (@{prf ...} and @{full_prf ...}) within
wenzelm@17097
   113
a proof context.
wenzelm@17097
   114
wenzelm@17097
   115
* Proper output of antiquotations for theory commands involving a
wenzelm@17097
   116
proof context (such as 'locale' or 'theorem (in loc) ...').
wenzelm@17097
   117
wenzelm@17193
   118
* Delimiters of outer tokens (string etc.) now produce separate LaTeX
wenzelm@17193
   119
macros (\isachardoublequoteopen, isachardoublequoteclose etc.).
wenzelm@17193
   120
wenzelm@17193
   121
* isatool usedir: new option -C (default true) controls whether option
wenzelm@17193
   122
-D should include a copy of the original document directory; -C false
wenzelm@17193
   123
prevents unwanted effects such as copying of administrative CVS data.
wenzelm@17193
   124
wenzelm@16234
   125
wenzelm@16234
   126
*** Pure ***
wenzelm@16234
   127
wenzelm@16234
   128
* Considerably improved version of 'constdefs' command.  Now performs
wenzelm@16234
   129
automatic type-inference of declared constants; additional support for
wenzelm@16234
   130
local structure declarations (cf. locales and HOL records), see also
wenzelm@16234
   131
isar-ref manual.  Potential INCOMPATIBILITY: need to observe strictly
wenzelm@16234
   132
sequential dependencies of definitions within a single 'constdefs'
wenzelm@16234
   133
section; moreover, the declared name needs to be an identifier.  If
wenzelm@16234
   134
all fails, consider to fall back on 'consts' and 'defs' separately.
wenzelm@16234
   135
wenzelm@16234
   136
* Improved indexed syntax and implicit structures.  First of all,
wenzelm@16234
   137
indexed syntax provides a notational device for subscripted
wenzelm@16234
   138
application, using the new syntax \<^bsub>term\<^esub> for arbitrary
wenzelm@16234
   139
expressions.  Secondly, in a local context with structure
wenzelm@16234
   140
declarations, number indexes \<^sub>n or the empty index (default
wenzelm@16234
   141
number 1) refer to a certain fixed variable implicitly; option
wenzelm@16234
   142
show_structs controls printing of implicit structures.  Typical
wenzelm@16234
   143
applications of these concepts involve record types and locales.
wenzelm@16234
   144
wenzelm@16234
   145
* New command 'no_syntax' removes grammar declarations (and
wenzelm@16234
   146
translations) resulting from the given syntax specification, which is
wenzelm@16234
   147
interpreted in the same manner as for the 'syntax' command.
wenzelm@16234
   148
wenzelm@16234
   149
* 'Advanced' translation functions (parse_translation etc.) may depend
wenzelm@16234
   150
on the signature of the theory context being presently used for
wenzelm@16234
   151
parsing/printing, see also isar-ref manual.
wenzelm@16234
   152
wenzelm@16856
   153
* Improved 'oracle' command provides a type-safe interface to turn an
wenzelm@16856
   154
ML expression of type theory -> T -> term into a primitive rule of
wenzelm@16856
   155
type theory -> T -> thm (i.e. the functionality of Thm.invoke_oracle
wenzelm@16856
   156
is already included here); see also FOL/ex/IffExample.thy;
wenzelm@16856
   157
INCOMPATIBILITY.
wenzelm@16856
   158
wenzelm@17275
   159
* axclass: name space prefix for class "c" is now "c_class" (was "c"
wenzelm@17275
   160
before); "cI" is no longer bound, use "c.intro" instead.
wenzelm@17275
   161
INCOMPATIBILITY.  This change avoids clashes of fact bindings for
wenzelm@17275
   162
axclasses vs. locales.
wenzelm@17275
   163
wenzelm@16234
   164
* Improved internal renaming of symbolic identifiers -- attach primes
wenzelm@16234
   165
instead of base 26 numbers.
wenzelm@16234
   166
wenzelm@16234
   167
* New flag show_question_marks controls printing of leading question
wenzelm@16234
   168
marks in schematic variable names.
wenzelm@16234
   169
wenzelm@16234
   170
* In schematic variable names, *any* symbol following \<^isub> or
wenzelm@16234
   171
\<^isup> is now treated as part of the base name.  For example, the
wenzelm@16234
   172
following works without printing of awkward ".0" indexes:
wenzelm@16234
   173
wenzelm@16234
   174
  lemma "x\<^isub>1 = x\<^isub>2 ==> x\<^isub>2 = x\<^isub>1"
wenzelm@16234
   175
    by simp
wenzelm@16234
   176
wenzelm@16234
   177
* Inner syntax includes (*(*nested*) comments*).
wenzelm@16234
   178
wenzelm@16234
   179
* Pretty pinter now supports unbreakable blocks, specified in mixfix
wenzelm@16234
   180
annotations as "(00...)".
wenzelm@16234
   181
wenzelm@16234
   182
* Clear separation of logical types and nonterminals, where the latter
wenzelm@16234
   183
may only occur in 'syntax' specifications or type abbreviations.
wenzelm@16234
   184
Before that distinction was only partially implemented via type class
wenzelm@16234
   185
"logic" vs. "{}".  Potential INCOMPATIBILITY in rare cases of improper
wenzelm@16234
   186
use of 'types'/'consts' instead of 'nonterminals'/'syntax'.  Some very
wenzelm@16234
   187
exotic syntax specifications may require further adaption
wenzelm@16234
   188
(e.g. Cube/Base.thy).
wenzelm@16234
   189
wenzelm@16234
   190
* Removed obsolete type class "logic", use the top sort {} instead.
wenzelm@16234
   191
Note that non-logical types should be declared as 'nonterminals'
wenzelm@16234
   192
rather than 'types'.  INCOMPATIBILITY for new object-logic
wenzelm@16234
   193
specifications.
wenzelm@16234
   194
ballarin@17095
   195
* Attributes 'induct' and 'cases': type or set names may now be
ballarin@17095
   196
locally fixed variables as well.
ballarin@17095
   197
wenzelm@16234
   198
* Simplifier: can now control the depth to which conditional rewriting
wenzelm@16234
   199
is traced via the PG menu Isabelle -> Settings -> Trace Simp Depth
wenzelm@16234
   200
Limit.
wenzelm@16234
   201
wenzelm@16234
   202
* Simplifier: simplification procedures may now take the current
wenzelm@16234
   203
simpset into account (cf. Simplifier.simproc(_i) / mk_simproc
wenzelm@16234
   204
interface), which is very useful for calling the Simplifier
wenzelm@16234
   205
recursively.  Minor INCOMPATIBILITY: the 'prems' argument of simprocs
wenzelm@16234
   206
is gone -- use prems_of_ss on the simpset instead.  Moreover, the
wenzelm@16234
   207
low-level mk_simproc no longer applies Logic.varify internally, to
wenzelm@16234
   208
allow for use in a context of fixed variables.
wenzelm@16234
   209
wenzelm@16234
   210
* thin_tac now works even if the assumption being deleted contains !!
wenzelm@16234
   211
or ==>.  More generally, erule now works even if the major premise of
wenzelm@16234
   212
the elimination rule contains !! or ==>.
wenzelm@16234
   213
wenzelm@16234
   214
* Reorganized bootstrapping of the Pure theories; CPure is now derived
wenzelm@16234
   215
from Pure, which contains all common declarations already.  Both
wenzelm@16234
   216
theories are defined via plain Isabelle/Isar .thy files.
wenzelm@16234
   217
INCOMPATIBILITY: elements of CPure (such as the CPure.intro /
wenzelm@16234
   218
CPure.elim / CPure.dest attributes) now appear in the Pure name space;
wenzelm@16234
   219
use isatool fixcpure to adapt your theory and ML sources.
wenzelm@16234
   220
wenzelm@16234
   221
* New syntax 'name(i-j, i-, i, ...)' for referring to specific
wenzelm@16234
   222
selections of theorems in named facts via index ranges.
wenzelm@16234
   223
wenzelm@17097
   224
* 'print_theorems': in theory mode, really print the difference
wenzelm@17097
   225
wrt. the last state (works for interactive theory development only),
wenzelm@17097
   226
in proof mode print all local facts (cf. 'print_facts');
wenzelm@17097
   227
wenzelm@17397
   228
* 'hide': option '(open)' hides only base names.
wenzelm@17397
   229
wenzelm@17275
   230
* More efficient treatment of intermediate checkpoints in interactive
wenzelm@17275
   231
theory development.
wenzelm@17275
   232
wenzelm@16234
   233
wenzelm@16234
   234
*** Locales ***
ballarin@17095
   235
wenzelm@17385
   236
* New commands for the interpretation of locale expressions in
wenzelm@17385
   237
theories (1), locales (2) and proof contexts (3).  These generate
wenzelm@17385
   238
proof obligations from the expression specification.  After the
wenzelm@17385
   239
obligations have been discharged, theorems of the expression are added
wenzelm@17385
   240
to the theory, target locale or proof context.  The synopsis of the
wenzelm@17385
   241
commands is a follows:
wenzelm@17385
   242
ballarin@17095
   243
  (1) interpretation expr inst
ballarin@17095
   244
  (2) interpretation target < expr
ballarin@17095
   245
  (3) interpret expr inst
wenzelm@17385
   246
ballarin@17095
   247
Interpretation in theories and proof contexts require a parameter
ballarin@17095
   248
instantiation of terms from the current context.  This is applied to
wenzelm@17385
   249
specifications and theorems of the interpreted expression.
wenzelm@17385
   250
Interpretation in locales only permits parameter renaming through the
wenzelm@17385
   251
locale expression.  Interpretation is smart in that interpretations
wenzelm@17385
   252
that are active already do not occur in proof obligations, neither are
wenzelm@17385
   253
instantiated theorems stored in duplicate.  Use 'print_interps' to
wenzelm@17385
   254
inspect active interpretations of a particular locale.  For details,
wenzelm@17385
   255
see the Isar Reference manual.
wenzelm@16234
   256
wenzelm@16234
   257
INCOMPATIBILITY: former 'instantiate' has been withdrawn, use
wenzelm@16234
   258
'interpret' instead.
wenzelm@16234
   259
wenzelm@17385
   260
* New context element 'constrains' for adding type constraints to
wenzelm@17385
   261
parameters.
wenzelm@17385
   262
wenzelm@17385
   263
* Context expressions: renaming of parameters with syntax
wenzelm@17385
   264
redeclaration.
ballarin@17095
   265
ballarin@17095
   266
* Locale declaration: 'includes' disallowed.
ballarin@17095
   267
wenzelm@16234
   268
* Proper static binding of attribute syntax -- i.e. types / terms /
wenzelm@16234
   269
facts mentioned as arguments are always those of the locale definition
wenzelm@16234
   270
context, independently of the context of later invocations.  Moreover,
wenzelm@16234
   271
locale operations (renaming and type / term instantiation) are applied
wenzelm@16234
   272
to attribute arguments as expected.
wenzelm@16234
   273
wenzelm@16234
   274
INCOMPATIBILITY of the ML interface: always pass Attrib.src instead of
wenzelm@16234
   275
actual attributes; rare situations may require Attrib.attribute to
wenzelm@16234
   276
embed those attributes into Attrib.src that lack concrete syntax.
wenzelm@16234
   277
Attribute implementations need to cooperate properly with the static
wenzelm@16234
   278
binding mechanism.  Basic parsers Args.XXX_typ/term/prop and
wenzelm@16234
   279
Attrib.XXX_thm etc. already do the right thing without further
wenzelm@16234
   280
intervention.  Only unusual applications -- such as "where" or "of"
wenzelm@16234
   281
(cf. src/Pure/Isar/attrib.ML), which process arguments depending both
wenzelm@16234
   282
on the context and the facts involved -- may have to assign parsed
wenzelm@16234
   283
values to argument tokens explicitly.
wenzelm@16234
   284
wenzelm@16234
   285
* Changed parameter management in theorem generation for long goal
wenzelm@16234
   286
statements with 'includes'.  INCOMPATIBILITY: produces a different
wenzelm@16234
   287
theorem statement in rare situations.
wenzelm@16234
   288
ballarin@17228
   289
* Locale inspection command 'print_locale' omits notes elements.  Use
ballarin@17228
   290
'print_locale!' to have them included in the output.
ballarin@17228
   291
wenzelm@16234
   292
wenzelm@16234
   293
*** Provers ***
wenzelm@16234
   294
wenzelm@16234
   295
* Provers/hypsubst.ML: improved version of the subst method, for
wenzelm@16234
   296
single-step rewriting: it now works in bound variable contexts. New is
wenzelm@16234
   297
'subst (asm)', for rewriting an assumption.  INCOMPATIBILITY: may
wenzelm@16234
   298
rewrite a different subterm than the original subst method, which is
wenzelm@16234
   299
still available as 'simplesubst'.
wenzelm@16234
   300
wenzelm@16234
   301
* Provers/quasi.ML: new transitivity reasoners for transitivity only
wenzelm@16234
   302
and quasi orders.
wenzelm@16234
   303
wenzelm@16234
   304
* Provers/trancl.ML: new transitivity reasoner for transitive and
wenzelm@16234
   305
reflexive-transitive closure of relations.
wenzelm@16234
   306
wenzelm@16234
   307
* Provers/blast.ML: new reference depth_limit to make blast's depth
wenzelm@16234
   308
limit (previously hard-coded with a value of 20) user-definable.
wenzelm@16234
   309
wenzelm@16234
   310
* Provers/simplifier.ML has been moved to Pure, where Simplifier.setup
wenzelm@16234
   311
is peformed already.  Object-logics merely need to finish their
wenzelm@16234
   312
initial simpset configuration as before.  INCOMPATIBILITY.
wenzelm@15703
   313
berghofe@15475
   314
schirmer@14700
   315
*** HOL ***
schirmer@14700
   316
wenzelm@16234
   317
* Symbolic syntax of Hilbert Choice Operator is now as follows:
wenzelm@14878
   318
wenzelm@14878
   319
  syntax (epsilon)
wenzelm@14878
   320
    "_Eps" :: "[pttrn, bool] => 'a"    ("(3\<some>_./ _)" [0, 10] 10)
wenzelm@14878
   321
wenzelm@16234
   322
The symbol \<some> is displayed as the alternative epsilon of LaTeX
wenzelm@16234
   323
and x-symbol; use option '-m epsilon' to get it actually printed.
wenzelm@16234
   324
Moreover, the mathematically important symbolic identifier \<epsilon>
wenzelm@16234
   325
becomes available as variable, constant etc.  INCOMPATIBILITY,
wenzelm@16234
   326
wenzelm@16234
   327
* "x > y" abbreviates "y < x" and "x >= y" abbreviates "y <= x".
wenzelm@16234
   328
Similarly for all quantifiers: "ALL x > y" etc.  The x-symbol for >=
wenzelm@17371
   329
is \<ge>. New transitivity rules have been added to HOL/Orderings.thy to
avigad@17016
   330
support corresponding Isar calculations.
wenzelm@16234
   331
wenzelm@16234
   332
* "{x:A. P}" abbreviates "{x. x:A & P}", and similarly for "\<in>"
wenzelm@16234
   333
instead of ":".
wenzelm@16234
   334
wenzelm@16234
   335
* theory SetInterval: changed the syntax for open intervals:
wenzelm@16234
   336
wenzelm@16234
   337
  Old       New
wenzelm@16234
   338
  {..n(}    {..<n}
wenzelm@16234
   339
  {)n..}    {n<..}
wenzelm@16234
   340
  {m..n(}   {m..<n}
wenzelm@16234
   341
  {)m..n}   {m<..n}
wenzelm@16234
   342
  {)m..n(}  {m<..<n}
wenzelm@16234
   343
wenzelm@16234
   344
The old syntax is still supported but will disappear in the next
wenzelm@16234
   345
release.  For conversion use the following Emacs search and replace
wenzelm@16234
   346
patterns (these are not perfect but work quite well):
nipkow@15046
   347
nipkow@15046
   348
  {)\([^\.]*\)\.\.  ->  {\1<\.\.}
nipkow@15046
   349
  \.\.\([^(}]*\)(}  ->  \.\.<\1}
nipkow@15046
   350
wenzelm@17389
   351
* Method comm_ring for proving equalities in commutative rings.
wenzelm@17389
   352
wenzelm@17389
   353
* Theory Finite_Set: changed the syntax for 'setsum', summation over
wenzelm@16234
   354
finite sets: "setsum (%x. e) A", which used to be "\<Sum>x:A. e", is
wenzelm@17371
   355
now either "SUM x:A. e" or "\<Sum>x \<in> A. e". The bound variable can
paulson@17189
   356
be a tuple pattern.
wenzelm@16234
   357
wenzelm@16234
   358
Some new syntax forms are available:
wenzelm@16234
   359
wenzelm@16234
   360
  "\<Sum>x | P. e"      for     "setsum (%x. e) {x. P}"
wenzelm@16234
   361
  "\<Sum>x = a..b. e"   for     "setsum (%x. e) {a..b}"
wenzelm@16234
   362
  "\<Sum>x = a..<b. e"  for     "setsum (%x. e) {a..<b}"
wenzelm@16234
   363
  "\<Sum>x < k. e"      for     "setsum (%x. e) {..<k}"
wenzelm@16234
   364
wenzelm@16234
   365
The latter form "\<Sum>x < k. e" used to be based on a separate
wenzelm@16234
   366
function "Summation", which has been discontinued.
wenzelm@16234
   367
wenzelm@16234
   368
* theory Finite_Set: in structured induction proofs, the insert case
wenzelm@16234
   369
is now 'case (insert x F)' instead of the old counterintuitive 'case
wenzelm@16234
   370
(insert F x)'.
wenzelm@16234
   371
wenzelm@16234
   372
* The 'refute' command has been extended to support a much larger
wenzelm@16234
   373
fragment of HOL, including axiomatic type classes, constdefs and
wenzelm@16234
   374
typedefs, inductive datatypes and recursion.
wenzelm@16234
   375
wenzelm@16234
   376
* Datatype induction via method 'induct' now preserves the name of the
wenzelm@16234
   377
induction variable. For example, when proving P(xs::'a list) by
wenzelm@16234
   378
induction on xs, the induction step is now P(xs) ==> P(a#xs) rather
wenzelm@16234
   379
than P(list) ==> P(a#list) as previously.  Potential INCOMPATIBILITY
wenzelm@16234
   380
in unstructured proof scripts.
wenzelm@16234
   381
wenzelm@16234
   382
* Reworked implementation of records.  Improved scalability for
wenzelm@16234
   383
records with many fields, avoiding performance problems for type
wenzelm@16234
   384
inference. Records are no longer composed of nested field types, but
wenzelm@16234
   385
of nested extension types. Therefore the record type only grows linear
wenzelm@16234
   386
in the number of extensions and not in the number of fields.  The
wenzelm@16234
   387
top-level (users) view on records is preserved.  Potential
wenzelm@16234
   388
INCOMPATIBILITY only in strange cases, where the theory depends on the
wenzelm@16234
   389
old record representation. The type generated for a record is called
wenzelm@16234
   390
<record_name>_ext_type.
wenzelm@16234
   391
wenzelm@16234
   392
Flag record_quick_and_dirty_sensitive can be enabled to skip the
wenzelm@16234
   393
proofs triggered by a record definition or a simproc (if
wenzelm@16234
   394
quick_and_dirty is enabled).  Definitions of large records can take
wenzelm@16234
   395
quite long.
wenzelm@16234
   396
wenzelm@16234
   397
New simproc record_upd_simproc for simplification of multiple record
wenzelm@16234
   398
updates enabled by default.  Moreover, trivial updates are also
wenzelm@16234
   399
removed: r(|x := x r|) = r.  INCOMPATIBILITY: old proofs break
wenzelm@16234
   400
occasionally, since simplification is more powerful by default.
wenzelm@16234
   401
wenzelm@17275
   402
* typedef: proper support for polymorphic sets, which contain extra
wenzelm@17275
   403
type-variables in the term.
wenzelm@17275
   404
wenzelm@16234
   405
* Simplifier: automatically reasons about transitivity chains
wenzelm@16234
   406
involving "trancl" (r^+) and "rtrancl" (r^*) by setting up tactics
wenzelm@16234
   407
provided by Provers/trancl.ML as additional solvers.  INCOMPATIBILITY:
wenzelm@16234
   408
old proofs break occasionally as simplification may now solve more
wenzelm@16234
   409
goals than previously.
wenzelm@16234
   410
wenzelm@16234
   411
* Simplifier: converts x <= y into x = y if assumption y <= x is
wenzelm@16234
   412
present.  Works for all partial orders (class "order"), in particular
wenzelm@16234
   413
numbers and sets.  For linear orders (e.g. numbers) it treats ~ x < y
wenzelm@16234
   414
just like y <= x.
wenzelm@16234
   415
wenzelm@16234
   416
* Simplifier: new simproc for "let x = a in f x".  If a is a free or
wenzelm@16234
   417
bound variable or a constant then the let is unfolded.  Otherwise
wenzelm@16234
   418
first a is simplified to b, and then f b is simplified to g. If
wenzelm@16234
   419
possible we abstract b from g arriving at "let x = b in h x",
wenzelm@16234
   420
otherwise we unfold the let and arrive at g.  The simproc can be
wenzelm@16234
   421
enabled/disabled by the reference use_let_simproc.  Potential
wenzelm@16234
   422
INCOMPATIBILITY since simplification is more powerful by default.
webertj@15776
   423
paulson@16563
   424
* Classical reasoning: the meson method now accepts theorems as arguments.
paulson@16563
   425
wenzelm@16891
   426
* Theory OrderedGroup and Ring_and_Field: various additions and
wenzelm@16891
   427
improvements to faciliate calculations involving equalities and
wenzelm@16891
   428
inequalities.
wenzelm@16891
   429
wenzelm@16891
   430
The following theorems have been eliminated or modified
wenzelm@16891
   431
(INCOMPATIBILITY):
avigad@16888
   432
avigad@16888
   433
  abs_eq             now named abs_of_nonneg
wenzelm@17371
   434
  abs_of_ge_0        now named abs_of_nonneg
wenzelm@17371
   435
  abs_minus_eq       now named abs_of_nonpos
avigad@16888
   436
  imp_abs_id         now named abs_of_nonneg
avigad@16888
   437
  imp_abs_neg_id     now named abs_of_nonpos
avigad@16888
   438
  mult_pos           now named mult_pos_pos
avigad@16888
   439
  mult_pos_le        now named mult_nonneg_nonneg
avigad@16888
   440
  mult_pos_neg_le    now named mult_nonneg_nonpos
avigad@16888
   441
  mult_pos_neg2_le   now named mult_nonneg_nonpos2
avigad@16888
   442
  mult_neg           now named mult_neg_neg
avigad@16888
   443
  mult_neg_le        now named mult_nonpos_nonpos
avigad@16888
   444
wenzelm@16891
   445
* Theory Parity: added rules for simplifying exponents.
wenzelm@16891
   446
nipkow@17092
   447
* Theory List:
nipkow@17092
   448
nipkow@17092
   449
The following theorems have been eliminated or modified
nipkow@17092
   450
(INCOMPATIBILITY):
nipkow@17092
   451
nipkow@17092
   452
  list_all_Nil       now named list_all.simps(1)
nipkow@17092
   453
  list_all_Cons      now named list_all.simps(2)
nipkow@17092
   454
  list_all_conv      now named list_all_iff
nipkow@17092
   455
  set_mem_eq         now named mem_iff
nipkow@17092
   456
wenzelm@16929
   457
* Theories SetsAndFunctions and BigO (see HOL/Library) support
wenzelm@16929
   458
asymptotic "big O" calculations.  See the notes in BigO.thy.
wenzelm@16929
   459
avigad@16888
   460
avigad@16888
   461
*** HOL-Complex ***
avigad@16888
   462
wenzelm@16891
   463
* Theory RealDef: better support for embedding natural numbers and
wenzelm@16891
   464
integers in the reals.
wenzelm@16891
   465
wenzelm@16891
   466
The following theorems have been eliminated or modified
wenzelm@16891
   467
(INCOMPATIBILITY):
wenzelm@16891
   468
avigad@17016
   469
  exp_ge_add_one_self  now requires no hypotheses
avigad@17016
   470
  real_of_int_add      reversed direction of equality (use [symmetric])
avigad@17016
   471
  real_of_int_minus    reversed direction of equality (use [symmetric])
avigad@17016
   472
  real_of_int_diff     reversed direction of equality (use [symmetric])
avigad@17016
   473
  real_of_int_mult     reversed direction of equality (use [symmetric])
wenzelm@16891
   474
wenzelm@16891
   475
* Theory RComplete: expanded support for floor and ceiling functions.
avigad@16888
   476
avigad@16962
   477
* Theory Ln is new, with properties of the natural logarithm
avigad@16962
   478
wenzelm@17423
   479
* Hyperreal: There is a new type constructor "star" for making
wenzelm@17423
   480
nonstandard types.  The old type names are now type synonyms:
wenzelm@17423
   481
wenzelm@17423
   482
  hypreal = real star
wenzelm@17423
   483
  hypnat = nat star
wenzelm@17423
   484
  hcomplex = complex star
wenzelm@17423
   485
wenzelm@17423
   486
* Hyperreal: Many groups of similarly-defined constants have been
wenzelm@17423
   487
replaced by polymorphic versions:
wenzelm@17423
   488
wenzelm@17423
   489
  star_of <-- hypreal_of_real, hypnat_of_nat, hcomplex_of_complex
wenzelm@17423
   490
wenzelm@17423
   491
  starset      <-- starsetNat, starsetC
wenzelm@17423
   492
  *s*          <-- *sNat*, *sc*
wenzelm@17423
   493
  starset_n    <-- starsetNat_n, starsetC_n
wenzelm@17423
   494
  *sn*         <-- *sNatn*, *scn*
wenzelm@17423
   495
  InternalSets <-- InternalNatSets, InternalCSets
wenzelm@17423
   496
wenzelm@17423
   497
  starfun      <-- starfunNat, starfunNat2, starfunC, starfunRC, starfunCR
wenzelm@17423
   498
  *f*          <-- *fNat*, *fNat2*, *fc*, *fRc*, *fcR*
wenzelm@17423
   499
  starfun_n    <-- starfunNat_n, starfunNat2_n, starfunC_n, starfunRC_n, starfunCR_n
wenzelm@17423
   500
  *fn*         <-- *fNatn*, *fNat2n*, *fcn*, *fRcn*, *fcRn*
wenzelm@17423
   501
  InternalFuns <-- InternalNatFuns, InternalNatFuns2, InternalCFuns, InternalRCFuns, InternalCRFuns
wenzelm@17423
   502
wenzelm@17423
   503
* Hyperreal: Many type-specific theorems have been removed in favor of
wenzelm@17423
   504
theorems specific to various axiomatic type classes:
wenzelm@17423
   505
wenzelm@17423
   506
  add_commute <-- hypreal_add_commute, hypnat_add_commute, hcomplex_add_commute
wenzelm@17423
   507
  add_assoc   <-- hypreal_add_assoc, hypnat_add_assoc, hcomplex_add_assoc
wenzelm@17423
   508
  OrderedGroup.add_0 <-- hypreal_add_zero_left, hypnat_add_zero_left, hcomplex_add_zero_left
wenzelm@17423
   509
  OrderedGroup.add_0_right <-- hypreal_add_zero_right, hcomplex_add_zero_right
wenzelm@17423
   510
  right_minus <-- hypreal_add_minus
wenzelm@17423
   511
  left_minus <-- hypreal_add_minus_left, hcomplex_add_minus_left
wenzelm@17423
   512
  mult_commute <-- hypreal_mult_commute, hypnat_mult_commute, hcomplex_mult_commute
wenzelm@17423
   513
  mult_assoc <-- hypreal_mult_assoc, hypnat_mult_assoc, hcomplex_mult_assoc
wenzelm@17423
   514
  mult_1_left <-- hypreal_mult_1, hypnat_mult_1, hcomplex_mult_one_left
wenzelm@17423
   515
  mult_1_right <-- hcomplex_mult_one_right
wenzelm@17423
   516
  mult_zero_left <-- hcomplex_mult_zero_left
wenzelm@17423
   517
  left_distrib <-- hypreal_add_mult_distrib, hypnat_add_mult_distrib, hcomplex_add_mult_distrib
wenzelm@17423
   518
  right_distrib <-- hypnat_add_mult_distrib2
wenzelm@17423
   519
  zero_neq_one <-- hypreal_zero_not_eq_one, hypnat_zero_not_eq_one, hcomplex_zero_not_eq_one
wenzelm@17423
   520
  right_inverse <-- hypreal_mult_inverse
wenzelm@17423
   521
  left_inverse <-- hypreal_mult_inverse_left, hcomplex_mult_inv_left
wenzelm@17423
   522
  order_refl <-- hypreal_le_refl, hypnat_le_refl
wenzelm@17423
   523
  order_trans <-- hypreal_le_trans, hypnat_le_trans
wenzelm@17423
   524
  order_antisym <-- hypreal_le_anti_sym, hypnat_le_anti_sym
wenzelm@17423
   525
  order_less_le <-- hypreal_less_le, hypnat_less_le
wenzelm@17423
   526
  linorder_linear <-- hypreal_le_linear, hypnat_le_linear
wenzelm@17423
   527
  add_left_mono <-- hypreal_add_left_mono, hypnat_add_left_mono
wenzelm@17423
   528
  mult_strict_left_mono <-- hypreal_mult_less_mono2, hypnat_mult_less_mono2
wenzelm@17423
   529
  add_nonneg_nonneg <-- hypreal_le_add_order
wenzelm@17423
   530
wenzelm@17423
   531
* Hyperreal: Separate theorems having to do with type-specific
wenzelm@17423
   532
versions of constants have been merged into theorems that apply to the
wenzelm@17423
   533
new polymorphic constants:
wenzelm@17423
   534
wenzelm@17423
   535
  STAR_UNIV_set <-- STAR_real_set, NatStar_real_set, STARC_complex_set
wenzelm@17423
   536
  STAR_empty_set <-- NatStar_empty_set, STARC_empty_set
wenzelm@17423
   537
  STAR_Un <-- NatStar_Un, STARC_Un
wenzelm@17423
   538
  STAR_Int <-- NatStar_Int, STARC_Int
wenzelm@17423
   539
  STAR_Compl <-- NatStar_Compl, STARC_Compl
wenzelm@17423
   540
  STAR_subset <-- NatStar_subset, STARC_subset
wenzelm@17423
   541
  STAR_mem <-- NatStar_mem, STARC_mem
wenzelm@17423
   542
  STAR_mem_Compl <-- STARC_mem_Compl
wenzelm@17423
   543
  STAR_diff <-- STARC_diff
wenzelm@17423
   544
  STAR_star_of_image_subset <-- STAR_hypreal_of_real_image_subset, NatStar_hypreal_of_real_image_subset, STARC_hcomplex_of_complex_image_subset
wenzelm@17423
   545
  starset_n_Un <-- starsetNat_n_Un, starsetC_n_Un
wenzelm@17423
   546
  starset_n_Int <-- starsetNat_n_Int, starsetC_n_Int
wenzelm@17423
   547
  starset_n_Compl <-- starsetNat_n_Compl, starsetC_n_Compl
wenzelm@17423
   548
  starset_n_diff <-- starsetNat_n_diff, starsetC_n_diff
wenzelm@17423
   549
  InternalSets_Un <-- InternalNatSets_Un, InternalCSets_Un
wenzelm@17423
   550
  InternalSets_Int <-- InternalNatSets_Int, InternalCSets_Int
wenzelm@17423
   551
  InternalSets_Compl <-- InternalNatSets_Compl, InternalCSets_Compl
wenzelm@17423
   552
  InternalSets_diff <-- InternalNatSets_diff, InternalCSets_diff
wenzelm@17423
   553
  InternalSets_UNIV_diff <-- InternalNatSets_UNIV_diff, InternalCSets_UNIV_diff
wenzelm@17423
   554
  InternalSets_starset_n <-- InternalNatSets_starsetNat_n, InternalCSets_starsetC_n
wenzelm@17423
   555
  starset_starset_n_eq <-- starsetNat_starsetNat_n_eq, starsetC_starsetC_n_eq
wenzelm@17423
   556
  starset_n_starset <-- starsetNat_n_starsetNat, starsetC_n_starsetC
wenzelm@17423
   557
  starfun_n_starfun <-- starfunNat_n_starfunNat, starfunNat2_n_starfunNat2, starfunC_n_starfunC, starfunRC_n_starfunRC, starfunCR_n_starfunCR
wenzelm@17423
   558
  starfun <-- starfunNat, starfunNat2, starfunC, starfunRC, starfunCR
wenzelm@17423
   559
  starfun_mult <-- starfunNat_mult, starfunNat2_mult, starfunC_mult, starfunRC_mult, starfunCR_mult
wenzelm@17423
   560
  starfun_add <-- starfunNat_add, starfunNat2_add, starfunC_add, starfunRC_add, starfunCR_add
wenzelm@17423
   561
  starfun_minus <-- starfunNat_minus, starfunNat2_minus, starfunC_minus, starfunRC_minus, starfunCR_minus
wenzelm@17423
   562
  starfun_diff <-- starfunC_diff, starfunRC_diff, starfunCR_diff
wenzelm@17423
   563
  starfun_o <-- starfunNatNat2_o, starfunNat2_o, starfun_stafunNat_o, starfunC_o, starfunC_starfunRC_o, starfun_starfunCR_o
wenzelm@17423
   564
  starfun_o2 <-- starfunNatNat2_o2, starfun_stafunNat_o2, starfunC_o2, starfunC_starfunRC_o2, starfun_starfunCR_o2
wenzelm@17423
   565
  starfun_const_fun <-- starfunNat_const_fun, starfunNat2_const_fun, starfunC_const_fun, starfunRC_const_fun, starfunCR_const_fun
wenzelm@17423
   566
  starfun_inverse <-- starfunNat_inverse, starfunC_inverse, starfunRC_inverse, starfunCR_inverse
wenzelm@17423
   567
  starfun_eq <-- starfunNat_eq, starfunNat2_eq, starfunC_eq, starfunRC_eq, starfunCR_eq
wenzelm@17423
   568
  starfun_eq_iff <-- starfunC_eq_iff, starfunRC_eq_iff, starfunCR_eq_iff
wenzelm@17423
   569
  starfun_Id <-- starfunC_Id
wenzelm@17423
   570
  starfun_approx <-- starfunNat_approx, starfunCR_approx
wenzelm@17423
   571
  starfun_capprox <-- starfunC_capprox, starfunRC_capprox
wenzelm@17423
   572
  starfun_abs <-- starfunNat_rabs
wenzelm@17423
   573
  starfun_lambda_cancel <-- starfunC_lambda_cancel, starfunCR_lambda_cancel, starfunRC_lambda_cancel
wenzelm@17423
   574
  starfun_lambda_cancel2 <-- starfunC_lambda_cancel2, starfunCR_lambda_cancel2, starfunRC_lambda_cancel2
wenzelm@17423
   575
  starfun_mult_HFinite_approx <-- starfunCR_mult_HFinite_capprox
wenzelm@17423
   576
  starfun_mult_CFinite_capprox <-- starfunC_mult_CFinite_capprox, starfunRC_mult_CFinite_capprox
wenzelm@17423
   577
  starfun_add_capprox <-- starfunC_add_capprox, starfunRC_add_capprox
wenzelm@17423
   578
  starfun_add_approx <-- starfunCR_add_approx
wenzelm@17423
   579
  starfun_inverse_inverse <-- starfunC_inverse_inverse
wenzelm@17423
   580
  starfun_divide <-- starfunC_divide, starfunCR_divide, starfunRC_divide
wenzelm@17423
   581
  starfun_n_congruent <-- starfunNat_n_congruent, starfunC_n_congruent
wenzelm@17423
   582
  starfun_n <-- starfunNat_n, starfunC_n
wenzelm@17423
   583
  starfun_n_mult <-- starfunNat_n_mult, starfunC_n_mult
wenzelm@17423
   584
  starfun_n_add <-- starfunNat_n_add, starfunC_n_add
wenzelm@17423
   585
  starfun_n_add_minus <-- starfunNat_n_add_minus
wenzelm@17423
   586
  starfun_n_const_fun <-- starfunNat_n_const_fun, starfunC_n_const_fun
wenzelm@17423
   587
  starfun_n_minus <-- starfunNat_n_minus, starfunC_n_minus
wenzelm@17423
   588
  starfun_n_eq <-- starfunNat_n_eq, starfunC_n_eq
wenzelm@17423
   589
wenzelm@17423
   590
  star_n_add <-- hypreal_add, hypnat_add, hcomplex_add
wenzelm@17423
   591
  star_n_minus <-- hypreal_minus, hcomplex_minus
wenzelm@17423
   592
  star_n_diff <-- hypreal_diff, hcomplex_diff
wenzelm@17423
   593
  star_n_mult <-- hypreal_mult, hcomplex_mult
wenzelm@17423
   594
  star_n_inverse <-- hypreal_inverse, hcomplex_inverse
wenzelm@17423
   595
  star_n_le <-- hypreal_le, hypnat_le
wenzelm@17423
   596
  star_n_less <-- hypreal_less, hypnat_less
wenzelm@17423
   597
  star_n_zero_num <-- hypreal_zero_num, hypnat_zero_num, hcomplex_zero_num
wenzelm@17423
   598
  star_n_one_num <-- hypreal_one_num, hypnat_one_num, hcomplex_one_num
wenzelm@17423
   599
  star_n_abs <-- hypreal_hrabs
wenzelm@17423
   600
  star_n_divide <-- hcomplex_divide
wenzelm@17423
   601
wenzelm@17423
   602
  star_of_add <-- hypreal_of_real_add, hcomplex_of_complex_add
wenzelm@17423
   603
  star_of_minus <-- hypreal_of_real_minus, hcomplex_of_complex_minus
wenzelm@17423
   604
  star_of_diff <-- hypreal_of_real_diff
wenzelm@17423
   605
  star_of_mult <-- hypreal_of_real_mult, hcomplex_of_complex_mult
wenzelm@17423
   606
  star_of_one <-- hypreal_of_real_one, hcomplex_of_complex_one
wenzelm@17423
   607
  star_of_zero <-- hypreal_of_real_zero, hcomplex_of_complex_zero
wenzelm@17423
   608
  star_of_le <-- hypreal_of_real_le_iff
wenzelm@17423
   609
  star_of_less <-- hypreal_of_real_less_iff
wenzelm@17423
   610
  star_of_eq <-- hypreal_of_real_eq_iff, hcomplex_of_complex_eq_iff
wenzelm@17423
   611
  star_of_inverse <-- hypreal_of_real_inverse, hcomplex_of_complex_inverse
wenzelm@17423
   612
  star_of_divide <-- hypreal_of_real_divide, hcomplex_of_complex_divide
wenzelm@17423
   613
  star_of_of_nat <-- hypreal_of_real_of_nat, hcomplex_of_complex_of_nat
wenzelm@17423
   614
  star_of_of_int <-- hypreal_of_real_of_int, hcomplex_of_complex_of_int
wenzelm@17423
   615
  star_of_number_of <-- hypreal_number_of, hcomplex_number_of
wenzelm@17423
   616
  star_of_number_less <-- number_of_less_hypreal_of_real_iff
wenzelm@17423
   617
  star_of_number_le <-- number_of_le_hypreal_of_real_iff
wenzelm@17423
   618
  star_of_eq_number <-- hypreal_of_real_eq_number_of_iff
wenzelm@17423
   619
  star_of_less_number <-- hypreal_of_real_less_number_of_iff
wenzelm@17423
   620
  star_of_le_number <-- hypreal_of_real_le_number_of_iff
wenzelm@17423
   621
  star_of_power <-- hypreal_of_real_power
wenzelm@17423
   622
  star_of_eq_0 <-- hcomplex_of_complex_zero_iff
wenzelm@17423
   623
wenzelm@14655
   624
wenzelm@14682
   625
*** HOLCF ***
wenzelm@14682
   626
wenzelm@14682
   627
* HOLCF: discontinued special version of 'constdefs' (which used to
wenzelm@16234
   628
support continuous functions) in favor of the general Pure one with
wenzelm@16234
   629
full type-inference.
wenzelm@14682
   630
wenzelm@14682
   631
paulson@14885
   632
*** ZF ***
paulson@14885
   633
wenzelm@16234
   634
* ZF/ex: theories Group and Ring provide examples in abstract algebra,
wenzelm@16234
   635
including the First Isomorphism Theorem (on quotienting by the kernel
wenzelm@16234
   636
of a homomorphism).
wenzelm@15089
   637
wenzelm@15089
   638
* ZF/Simplifier: install second copy of type solver that actually
wenzelm@16234
   639
makes use of TC rules declared to Isar proof contexts (or locales);
wenzelm@16234
   640
the old version is still required for ML proof scripts.
wenzelm@15703
   641
wenzelm@15703
   642
wenzelm@15703
   643
*** ML ***
wenzelm@15703
   644
wenzelm@15973
   645
* Pure/library.ML no longer defines its own option datatype, but uses
wenzelm@16234
   646
that of the SML basis, which has constructors NONE and SOME instead of
wenzelm@16234
   647
None and Some, as well as exception Option.Option instead of OPTION.
wenzelm@16234
   648
The functions the, if_none, is_some, is_none have been adapted
wenzelm@16234
   649
accordingly, while Option.map replaces apsome.
wenzelm@15973
   650
wenzelm@16860
   651
* Pure/library.ML: the exception LIST has been given up in favour of
wenzelm@16860
   652
the standard exceptions Empty and Subscript, as well as
wenzelm@16860
   653
Library.UnequalLengths.  Function like Library.hd and Library.tl are
wenzelm@16860
   654
superceded by the standard hd and tl functions etc.
wenzelm@16860
   655
wenzelm@16860
   656
A number of basic list functions are no longer exported to the ML
wenzelm@16860
   657
toplevel, as they are variants of predefined functions.  The following
wenzelm@16234
   658
suggests how one can translate existing code:
wenzelm@15973
   659
wenzelm@15973
   660
    rev_append xs ys = List.revAppend (xs, ys)
wenzelm@15973
   661
    nth_elem (i, xs) = List.nth (xs, i)
wenzelm@15973
   662
    last_elem xs = List.last xs
wenzelm@15973
   663
    flat xss = List.concat xss
wenzelm@16234
   664
    seq fs = List.app fs
wenzelm@15973
   665
    partition P xs = List.partition P xs
wenzelm@15973
   666
    mapfilter f xs = List.mapPartial f xs
wenzelm@15973
   667
wenzelm@16860
   668
* Pure/library.ML: several combinators for linear functional
wenzelm@16860
   669
transformations, notably reverse application and composition:
wenzelm@16860
   670
wenzelm@17371
   671
  x |> f                f #> g
wenzelm@17371
   672
  (x, y) |-> f          f #-> g
wenzelm@16860
   673
wenzelm@17408
   674
* Pure/library.ML: natural list combinators fold, fold_rev, and
haftmann@16869
   675
fold_map support linear functional transformations and nesting.  For
wenzelm@16860
   676
example:
wenzelm@16860
   677
wenzelm@16860
   678
  fold f [x1, ..., xN] y =
wenzelm@16860
   679
    y |> f x1 |> ... |> f xN
wenzelm@16860
   680
wenzelm@16860
   681
  (fold o fold) f [xs1, ..., xsN] y =
wenzelm@16860
   682
    y |> fold f xs1 |> ... |> fold f xsN
wenzelm@16860
   683
wenzelm@16860
   684
  fold f [x1, ..., xN] =
wenzelm@16860
   685
    f x1 #> ... #> f xN
wenzelm@16860
   686
wenzelm@16860
   687
  (fold o fold) f [xs1, ..., xsN] =
wenzelm@16860
   688
    fold f xs1 #> ... #> fold f xsN
wenzelm@16860
   689
wenzelm@17408
   690
* Pure/library.ML: the following selectors on type 'a option are
wenzelm@17408
   691
available:
wenzelm@17408
   692
wenzelm@17408
   693
  the:               'a option -> 'a  (*partial*)
wenzelm@17408
   694
  these:             'a option -> 'a  where 'a = 'b list
haftmann@17402
   695
  the_default: 'a -> 'a option -> 'a
haftmann@17402
   696
  the_list:          'a option -> 'a list
haftmann@17402
   697
wenzelm@17408
   698
* Pure/General: structure AList (cf. Pure/General/alist.ML) provides
wenzelm@17408
   699
basic operations for association lists, following natural argument
wenzelm@17408
   700
order.  The old functions may be expressed as follows:
wenzelm@17408
   701
wenzelm@17408
   702
  assoc = uncurry (AList.lookup (op =))
wenzelm@17408
   703
  assocs = these oo AList.lookup (op =)
wenzelm@17408
   704
  overwrite = uncurry (AList.update (op =)) o swap
wenzelm@17408
   705
wenzelm@17408
   706
* Pure/General: structure AList (cf. Pure/General/alist.ML) provides
wenzelm@17408
   707
basic operations for association lists, following natural argument
wenzelm@17408
   708
order; moreover the explicit equality predicate passed here avoids
wenzelm@17408
   709
potentially expensive polymorphic runtime equality checks.
wenzelm@17408
   710
wenzelm@17408
   711
* Pure/General: structure OrdList (cf. Pure/General/ord_list.ML)
wenzelm@17408
   712
provides a reasonably efficient light-weight implementation of sets as
wenzelm@17408
   713
lists.
wenzelm@17408
   714
wenzelm@17408
   715
* Pure/General: generic tables (cf. Pure/General/table.ML) provide a
wenzelm@17408
   716
few new operations; existing lookup and update are now curried to
wenzelm@17408
   717
follow natural argument order (for use with fold etc.);
wenzelm@17408
   718
INCOMPATIBILITY, use (uncurry Symtab.lookup) etc. as last resort.
wenzelm@17408
   719
wenzelm@17408
   720
* Pure/General: output via the Isabelle channels of
wenzelm@17408
   721
writeln/warning/error etc. is now passed through Output.output, with a
wenzelm@17408
   722
hook for arbitrary transformations depending on the print_mode
wenzelm@17408
   723
(cf. Output.add_mode -- the first active mode that provides a output
wenzelm@17408
   724
function wins).  Already formatted output may be embedded into further
wenzelm@17408
   725
text via Output.raw; the result of Pretty.string_of/str_of and derived
wenzelm@17408
   726
functions (string_of_term/cterm/thm etc.) is already marked raw to
wenzelm@17408
   727
accommodate easy composition of diagnostic messages etc.  Programmers
wenzelm@17408
   728
rarely need to care about Output.output or Output.raw at all, with
wenzelm@17408
   729
some notable exceptions: Output.output is required when bypassing the
wenzelm@17408
   730
standard channels (writeln etc.), or in token translations to produce
wenzelm@17408
   731
properly formatted results; Output.raw is required when capturing
wenzelm@17408
   732
already output material that will eventually be presented to the user
wenzelm@17408
   733
a second time.  For the default print mode, both Output.output and
wenzelm@17408
   734
Output.raw have no effect.
wenzelm@17408
   735
wenzelm@17408
   736
* Pure/General: Output.time_accumulator NAME creates an operator ('a
wenzelm@17408
   737
-> 'b) -> 'a -> 'b to measure runtime and count invocations; the
wenzelm@17408
   738
cumulative results are displayed at the end of a batch session.
wenzelm@17408
   739
wenzelm@17408
   740
* Pure/General: File.sysify_path and File.quote_sysify path have been
wenzelm@17408
   741
replaced by File.platform_path and File.shell_path (with appropriate
wenzelm@17408
   742
hooks).  This provides a clean interface for unusual systems where the
wenzelm@17408
   743
internal and external process view of file names are different.
wenzelm@17408
   744
wenzelm@16689
   745
* Pure: more efficient orders for basic syntactic entities: added
wenzelm@16689
   746
fast_string_ord, fast_indexname_ord, fast_term_ord; changed sort_ord
wenzelm@16689
   747
and typ_ord to use fast_string_ord and fast_indexname_ord (term_ord is
wenzelm@16689
   748
NOT affected); structures Symtab, Vartab, Typtab, Termtab use the fast
wenzelm@16689
   749
orders now -- potential INCOMPATIBILITY for code that depends on a
wenzelm@16689
   750
particular order for Symtab.keys, Symtab.dest, etc. (consider using
wenzelm@16689
   751
Library.sort_strings on result).
wenzelm@16689
   752
wenzelm@17408
   753
* Pure/term.ML: combinators fold_atyps, fold_aterms, fold_term_types,
wenzelm@17408
   754
fold_types traverse types/terms from left to right, observing natural
wenzelm@17408
   755
argument order.  Supercedes previous foldl_XXX versions, add_frees,
wenzelm@17408
   756
add_vars etc. have been adapted as well: INCOMPATIBILITY.
wenzelm@17408
   757
wenzelm@16151
   758
* Pure: name spaces have been refined, with significant changes of the
wenzelm@16234
   759
internal interfaces -- INCOMPATIBILITY.  Renamed cond_extern(_table)
wenzelm@16234
   760
to extern(_table).  The plain name entry path is superceded by a
wenzelm@16234
   761
general 'naming' context, which also includes the 'policy' to produce
wenzelm@16234
   762
a fully qualified name and external accesses of a fully qualified
wenzelm@16234
   763
name; NameSpace.extend is superceded by context dependent
wenzelm@16234
   764
Sign.declare_name.  Several theory and proof context operations modify
wenzelm@16234
   765
the naming context.  Especially note Theory.restore_naming and
wenzelm@16234
   766
ProofContext.restore_naming to get back to a sane state; note that
wenzelm@16234
   767
Theory.add_path is no longer sufficient to recover from
wenzelm@16234
   768
Theory.absolute_path in particular.
wenzelm@16234
   769
wenzelm@16234
   770
* Pure: new flags short_names (default false) and unique_names
wenzelm@16234
   771
(default true) for controlling output of qualified names.  If
wenzelm@16234
   772
short_names is set, names are printed unqualified.  If unique_names is
wenzelm@16234
   773
reset, the name prefix is reduced to the minimum required to achieve
wenzelm@16234
   774
the original result when interning again, even if there is an overlap
wenzelm@16234
   775
with earlier declarations.
wenzelm@16151
   776
wenzelm@16456
   777
* Pure/TheoryDataFun: change of the argument structure; 'prep_ext' is
wenzelm@16456
   778
now 'extend', and 'merge' gets an additional Pretty.pp argument
wenzelm@16456
   779
(useful for printing error messages).  INCOMPATIBILITY.
wenzelm@16456
   780
wenzelm@16456
   781
* Pure: major reorganization of the theory context.  Type Sign.sg and
wenzelm@16456
   782
Theory.theory are now identified, referring to the universal
wenzelm@16456
   783
Context.theory (see Pure/context.ML).  Actual signature and theory
wenzelm@16456
   784
content is managed as theory data.  The old code and interfaces were
wenzelm@16456
   785
spread over many files and structures; the new arrangement introduces
wenzelm@16456
   786
considerable INCOMPATIBILITY to gain more clarity:
wenzelm@16456
   787
wenzelm@16456
   788
  Context -- theory management operations (name, identity, inclusion,
wenzelm@16456
   789
    parents, ancestors, merge, etc.), plus generic theory data;
wenzelm@16456
   790
wenzelm@16456
   791
  Sign -- logical signature and syntax operations (declaring consts,
wenzelm@16456
   792
    types, etc.), plus certify/read for common entities;
wenzelm@16456
   793
wenzelm@16456
   794
  Theory -- logical theory operations (stating axioms, definitions,
wenzelm@16456
   795
    oracles), plus a copy of logical signature operations (consts,
wenzelm@16456
   796
    types, etc.); also a few basic management operations (Theory.copy,
wenzelm@16456
   797
    Theory.merge, etc.)
wenzelm@16456
   798
wenzelm@16456
   799
The most basic sign_of operations (Theory.sign_of, Thm.sign_of_thm
wenzelm@16456
   800
etc.) as well as the sign field in Thm.rep_thm etc. have been retained
wenzelm@16456
   801
for convenience -- they merely return the theory.
wenzelm@16456
   802
wenzelm@17193
   803
* Pure: type Type.tsig is superceded by theory in most interfaces.
wenzelm@17193
   804
wenzelm@16547
   805
* Pure: the Isar proof context type is already defined early in Pure
wenzelm@16547
   806
as Context.proof (note that ProofContext.context and Proof.context are
wenzelm@16547
   807
aliases, where the latter is the preferred name).  This enables other
wenzelm@16547
   808
Isabelle components to refer to that type even before Isar is present.
wenzelm@16547
   809
wenzelm@16373
   810
* Pure/sign/theory: discontinued named name spaces (i.e. classK,
wenzelm@16373
   811
typeK, constK, axiomK, oracleK), but provide explicit operations for
wenzelm@16373
   812
any of these kinds.  For example, Sign.intern typeK is now
wenzelm@16373
   813
Sign.intern_type, Theory.hide_space Sign.typeK is now
wenzelm@16373
   814
Theory.hide_types.  Also note that former
wenzelm@16373
   815
Theory.hide_classes/types/consts are now
wenzelm@16373
   816
Theory.hide_classes_i/types_i/consts_i, while the non '_i' versions
wenzelm@16373
   817
internalize their arguments!  INCOMPATIBILITY.
wenzelm@16373
   818
wenzelm@16506
   819
* Pure: get_thm interface (of PureThy and ProofContext) expects
wenzelm@16506
   820
datatype thmref (with constructors Name and NameSelection) instead of
wenzelm@16506
   821
plain string -- INCOMPATIBILITY;
wenzelm@16506
   822
wenzelm@16151
   823
* Pure: cases produced by proof methods specify options, where NONE
wenzelm@16234
   824
means to remove case bindings -- INCOMPATIBILITY in
wenzelm@16234
   825
(RAW_)METHOD_CASES.
wenzelm@16151
   826
wenzelm@16373
   827
* Pure: the following operations retrieve axioms or theorems from a
wenzelm@16373
   828
theory node or theory hierarchy, respectively:
wenzelm@16373
   829
wenzelm@16373
   830
  Theory.axioms_of: theory -> (string * term) list
wenzelm@16373
   831
  Theory.all_axioms_of: theory -> (string * term) list
wenzelm@16373
   832
  PureThy.thms_of: theory -> (string * thm) list
wenzelm@16373
   833
  PureThy.all_thms_of: theory -> (string * thm) list
wenzelm@16373
   834
wenzelm@16718
   835
* Pure: print_tac now outputs the goal through the trace channel.
wenzelm@16718
   836
wenzelm@17408
   837
* Isar toplevel: improved diagnostics, mostly for Poly/ML only.
wenzelm@17408
   838
Reference Toplevel.debug (default false) controls detailed printing
wenzelm@17408
   839
and tracing of low-level exceptions; Toplevel.profiling (default 0)
wenzelm@17408
   840
controls execution profiling -- set to 1 for time and 2 for space
wenzelm@17408
   841
(both increase the runtime).
wenzelm@17408
   842
wenzelm@17408
   843
* Isar session: The initial use of ROOT.ML is now always timed,
wenzelm@17408
   844
i.e. the log will show the actual process times, in contrast to the
wenzelm@17408
   845
elapsed wall-clock time that the outer shell wrapper produces.
wenzelm@17408
   846
wenzelm@17408
   847
* Simplifier: improved handling of bound variables (nameless
wenzelm@16997
   848
representation, avoid allocating new strings).  Simprocs that invoke
wenzelm@16997
   849
the Simplifier recursively should use Simplifier.inherit_bounds to
wenzelm@16997
   850
avoid local name clashes.
wenzelm@16997
   851
wenzelm@17408
   852
* Provers: Simplifier and Classical Reasoner now support proof context
wenzelm@17408
   853
dependent plug-ins (simprocs, solvers, wrappers etc.).  These extra
wenzelm@17408
   854
components are stored in the theory and patched into the
wenzelm@16234
   855
simpset/claset when used in an Isar proof context.  Context dependent
wenzelm@16234
   856
components are maintained by the following theory operations:
wenzelm@16234
   857
wenzelm@16234
   858
  Simplifier.add_context_simprocs
wenzelm@16234
   859
  Simplifier.del_context_simprocs
wenzelm@16234
   860
  Simplifier.set_context_subgoaler
wenzelm@16234
   861
  Simplifier.reset_context_subgoaler
wenzelm@16234
   862
  Simplifier.add_context_looper
wenzelm@16234
   863
  Simplifier.del_context_looper
wenzelm@16234
   864
  Simplifier.add_context_unsafe_solver
wenzelm@16234
   865
  Simplifier.add_context_safe_solver
wenzelm@16234
   866
wenzelm@16234
   867
  Classical.add_context_safe_wrapper
wenzelm@16234
   868
  Classical.del_context_safe_wrapper
wenzelm@16234
   869
  Classical.add_context_unsafe_wrapper
wenzelm@16234
   870
  Classical.del_context_unsafe_wrapper
wenzelm@16234
   871
wenzelm@16234
   872
IMPORTANT NOTE: proof tools (methods etc.) need to use
wenzelm@16234
   873
local_simpset_of and local_claset_of to instead of the primitive
wenzelm@16234
   874
Simplifier.get_local_simpset and Classical.get_local_claset,
wenzelm@16234
   875
respectively, in order to see the context dependent fields!
wenzelm@16234
   876
wenzelm@17166
   877
* ML functions legacy_bindings and use_legacy_bindings produce ML fact
wenzelm@17166
   878
bindings for all theorems stored within a given theory; this may help
wenzelm@17166
   879
in porting non-Isar theories to Isar ones, while keeping ML proof
wenzelm@17166
   880
scripts for the time being.
wenzelm@17166
   881
wenzelm@16234
   882
wenzelm@16234
   883
*** System ***
wenzelm@16234
   884
wenzelm@16234
   885
* Allow symlinks to all proper Isabelle executables (Isabelle,
wenzelm@16234
   886
isabelle, isatool etc.).
wenzelm@16234
   887
wenzelm@16234
   888
* ISABELLE_DOC_FORMAT setting specifies preferred document format (for
wenzelm@16234
   889
isatool doc, isatool mkdir, display_drafts etc.).
wenzelm@16234
   890
wenzelm@16234
   891
* isatool usedir: option -f allows specification of the ML file to be
wenzelm@16234
   892
used by Isabelle; default is ROOT.ML.
wenzelm@16234
   893
wenzelm@16251
   894
* New isatool version outputs the version identifier of the Isabelle
wenzelm@16251
   895
distribution being used.
wenzelm@16251
   896
wenzelm@16251
   897
* HOL: new isatool dimacs2hol converts files in DIMACS CNF format
wenzelm@16234
   898
(containing Boolean satisfiability problems) into Isabelle/HOL
wenzelm@16234
   899
theories.
wenzelm@15703
   900
wenzelm@15703
   901
wenzelm@14655
   902
wenzelm@14606
   903
New in Isabelle2004 (April 2004)
wenzelm@14606
   904
--------------------------------
wenzelm@13280
   905
skalberg@14171
   906
*** General ***
skalberg@14171
   907
ballarin@14398
   908
* Provers/order.ML:  new efficient reasoner for partial and linear orders.
ballarin@14398
   909
  Replaces linorder.ML.
ballarin@14398
   910
wenzelm@14606
   911
* Pure: Greek letters (except small lambda, \<lambda>), as well as Gothic
wenzelm@14606
   912
  (\<aa>...\<zz>\<AA>...\<ZZ>), calligraphic (\<A>...\<Z>), and Euler
skalberg@14173
   913
  (\<a>...\<z>), are now considered normal letters, and can therefore
skalberg@14173
   914
  be used anywhere where an ASCII letter (a...zA...Z) has until
skalberg@14173
   915
  now. COMPATIBILITY: This obviously changes the parsing of some
skalberg@14173
   916
  terms, especially where a symbol has been used as a binder, say
skalberg@14173
   917
  '\<Pi>x. ...', which is now a type error since \<Pi>x will be parsed
skalberg@14173
   918
  as an identifier.  Fix it by inserting a space around former
skalberg@14173
   919
  symbols.  Call 'isatool fixgreek' to try to fix parsing errors in
skalberg@14173
   920
  existing theory and ML files.
skalberg@14171
   921
paulson@14237
   922
* Pure: Macintosh and Windows line-breaks are now allowed in theory files.
paulson@14237
   923
wenzelm@14731
   924
* Pure: single letter sub/superscripts (\<^isub> and \<^isup>) are now
wenzelm@14731
   925
  allowed in identifiers. Similar to Greek letters \<^isub> is now considered
wenzelm@14731
   926
  a normal (but invisible) letter. For multiple letter subscripts repeat
wenzelm@14731
   927
  \<^isub> like this: x\<^isub>1\<^isub>2.
kleing@14233
   928
kleing@14333
   929
* Pure: There are now sub-/superscripts that can span more than one
kleing@14333
   930
  character. Text between \<^bsub> and \<^esub> is set in subscript in
wenzelm@14606
   931
  ProofGeneral and LaTeX, text between \<^bsup> and \<^esup> in
wenzelm@14606
   932
  superscript. The new control characters are not identifier parts.
kleing@14333
   933
schirmer@14561
   934
* Pure: Control-symbols of the form \<^raw:...> will literally print the
wenzelm@14606
   935
  content of "..." to the latex file instead of \isacntrl... . The "..."
wenzelm@14606
   936
  may consist of any printable characters excluding the end bracket >.
schirmer@14361
   937
paulson@14237
   938
* Pure: Using new Isar command "finalconsts" (or the ML functions
paulson@14237
   939
  Theory.add_finals or Theory.add_finals_i) it is now possible to
paulson@14237
   940
  declare constants "final", which prevents their being given a definition
paulson@14237
   941
  later.  It is useful for constants whose behaviour is fixed axiomatically
skalberg@14224
   942
  rather than definitionally, such as the meta-logic connectives.
skalberg@14224
   943
wenzelm@14606
   944
* Pure: 'instance' now handles general arities with general sorts
wenzelm@14606
   945
  (i.e. intersections of classes),
skalberg@14503
   946
kleing@14547
   947
* Presentation: generated HTML now uses a CSS style sheet to make layout
wenzelm@14731
   948
  (somewhat) independent of content. It is copied from lib/html/isabelle.css.
kleing@14547
   949
  It can be changed to alter the colors/layout of generated pages.
kleing@14547
   950
wenzelm@14556
   951
ballarin@14175
   952
*** Isar ***
ballarin@14175
   953
ballarin@14508
   954
* Tactic emulation methods rule_tac, erule_tac, drule_tac, frule_tac,
ballarin@14508
   955
  cut_tac, subgoal_tac and thin_tac:
ballarin@14175
   956
  - Now understand static (Isar) contexts.  As a consequence, users of Isar
ballarin@14175
   957
    locales are no longer forced to write Isar proof scripts.
ballarin@14175
   958
    For details see Isar Reference Manual, paragraph 4.3.2: Further tactic
ballarin@14175
   959
    emulations.
ballarin@14175
   960
  - INCOMPATIBILITY: names of variables to be instantiated may no
ballarin@14211
   961
    longer be enclosed in quotes.  Instead, precede variable name with `?'.
ballarin@14211
   962
    This is consistent with the instantiation attribute "where".
ballarin@14211
   963
ballarin@14257
   964
* Attributes "where" and "of":
ballarin@14285
   965
  - Now take type variables of instantiated theorem into account when reading
ballarin@14285
   966
    the instantiation string.  This fixes a bug that caused instantiated
ballarin@14285
   967
    theorems to have too special types in some circumstances.
ballarin@14285
   968
  - "where" permits explicit instantiations of type variables.
ballarin@14257
   969
wenzelm@14556
   970
* Calculation commands "moreover" and "also" no longer interfere with
wenzelm@14556
   971
  current facts ("this"), admitting arbitrary combinations with "then"
wenzelm@14556
   972
  and derived forms.
kleing@14283
   973
ballarin@14211
   974
* Locales:
ballarin@14211
   975
  - Goal statements involving the context element "includes" no longer
ballarin@14211
   976
    generate theorems with internal delta predicates (those ending on
ballarin@14211
   977
    "_axioms") in the premise.
ballarin@14211
   978
    Resolve particular premise with <locale>.intro to obtain old form.
ballarin@14211
   979
  - Fixed bug in type inference ("unify_frozen") that prevented mix of target
ballarin@14211
   980
    specification and "includes" elements in goal statement.
ballarin@14254
   981
  - Rule sets <locale>.intro and <locale>.axioms no longer declared as
ballarin@14254
   982
    [intro?] and [elim?] (respectively) by default.
ballarin@14508
   983
  - Experimental command for instantiation of locales in proof contexts:
ballarin@14551
   984
        instantiate <label>[<attrs>]: <loc>
ballarin@14508
   985
    Instantiates locale <loc> and adds all its theorems to the current context
ballarin@14551
   986
    taking into account their attributes.  Label and attrs are optional
ballarin@14551
   987
    modifiers, like in theorem declarations.  If present, names of
ballarin@14551
   988
    instantiated theorems are qualified with <label>, and the attributes
ballarin@14551
   989
    <attrs> are applied after any attributes these theorems might have already.
ballarin@14551
   990
      If the locale has assumptions, a chained fact of the form
ballarin@14508
   991
    "<loc> t1 ... tn" is expected from which instantiations of the parameters
ballarin@14551
   992
    are derived.  The command does not support old-style locales declared
ballarin@14551
   993
    with "locale (open)".
ballarin@14551
   994
      A few (very simple) examples can be found in FOL/ex/LocaleInst.thy.
ballarin@14175
   995
ballarin@14175
   996
* HOL: Tactic emulation methods induct_tac and case_tac understand static
ballarin@14175
   997
  (Isar) contexts.
ballarin@14175
   998
wenzelm@14556
   999
kleing@14136
  1000
*** HOL ***
kleing@14136
  1001
kleing@14624
  1002
* Proof import: new image HOL4 contains the imported library from
kleing@14624
  1003
  the HOL4 system with about 2500 theorems. It is imported by
kleing@14624
  1004
  replaying proof terms produced by HOL4 in Isabelle. The HOL4 image
kleing@14624
  1005
  can be used like any other Isabelle image.  See
kleing@14624
  1006
  HOL/Import/HOL/README for more information.
kleing@14624
  1007
ballarin@14398
  1008
* Simplifier:
ballarin@14398
  1009
  - Much improved handling of linear and partial orders.
ballarin@14398
  1010
    Reasoners for linear and partial orders are set up for type classes
ballarin@14398
  1011
    "linorder" and "order" respectively, and are added to the default simpset
ballarin@14398
  1012
    as solvers.  This means that the simplifier can build transitivity chains
ballarin@14398
  1013
    to solve goals from the assumptions.
ballarin@14398
  1014
  - INCOMPATIBILITY: old proofs break occasionally.  Typically, applications
ballarin@14398
  1015
    of blast or auto after simplification become unnecessary because the goal
ballarin@14398
  1016
    is solved by simplification already.
ballarin@14398
  1017
wenzelm@14731
  1018
* Numerics: new theory Ring_and_Field contains over 250 basic numerical laws,
paulson@14389
  1019
    all proved in axiomatic type classes for semirings, rings and fields.
paulson@14389
  1020
paulson@14389
  1021
* Numerics:
paulson@14389
  1022
  - Numeric types (nat, int, and in HOL-Complex rat, real, complex, etc.) are
wenzelm@14731
  1023
    now formalized using the Ring_and_Field theory mentioned above.
paulson@14389
  1024
  - INCOMPATIBILITY: simplification and arithmetic behaves somewhat differently
paulson@14389
  1025
    than before, because now they are set up once in a generic manner.
wenzelm@14731
  1026
  - INCOMPATIBILITY: many type-specific arithmetic laws have gone.
paulson@14480
  1027
    Look for the general versions in Ring_and_Field (and Power if they concern
paulson@14480
  1028
    exponentiation).
paulson@14389
  1029
paulson@14401
  1030
* Type "rat" of the rational numbers is now available in HOL-Complex.
paulson@14389
  1031
schirmer@14255
  1032
* Records:
schirmer@14255
  1033
  - Record types are now by default printed with their type abbreviation
schirmer@14255
  1034
    instead of the list of all field types. This can be configured via
schirmer@14255
  1035
    the reference "print_record_type_abbr".
wenzelm@14731
  1036
  - Simproc "record_upd_simproc" for simplification of multiple updates added
schirmer@14255
  1037
    (not enabled by default).
schirmer@14427
  1038
  - Simproc "record_ex_sel_eq_simproc" to simplify EX x. sel r = x resp.
schirmer@14427
  1039
    EX x. x = sel r to True (not enabled by default).
schirmer@14255
  1040
  - Tactic "record_split_simp_tac" to split and simplify records added.
wenzelm@14731
  1041
kleing@14136
  1042
* 'specification' command added, allowing for definition by
skalberg@14224
  1043
  specification.  There is also an 'ax_specification' command that
skalberg@14224
  1044
  introduces the new constants axiomatically.
kleing@14136
  1045
nipkow@14375
  1046
* arith(_tac) is now able to generate counterexamples for reals as well.
nipkow@14375
  1047
ballarin@14399
  1048
* HOL-Algebra: new locale "ring" for non-commutative rings.
ballarin@14399
  1049
paulson@14243
  1050
* HOL-ex: InductiveInvariant_examples illustrates advanced recursive function
kleing@14610
  1051
  definitions, thanks to Sava Krsti\'{c} and John Matthews.
kleing@14610
  1052
wenzelm@14731
  1053
* HOL-Matrix: a first theory for matrices in HOL with an application of
kleing@14610
  1054
  matrix theory to linear programming.
kleing@14136
  1055
nipkow@14380
  1056
* Unions and Intersections:
nipkow@15119
  1057
  The latex output syntax of UN and INT has been changed
nipkow@15119
  1058
  from "\Union x \in A. B" to "\Union_{x \in A} B"
nipkow@15119
  1059
  i.e. the index formulae has become a subscript.
nipkow@15119
  1060
  Similarly for "\Union x. B", and for \Inter instead of \Union.
nipkow@14380
  1061
kleing@14418
  1062
* Unions and Intersections over Intervals:
wenzelm@14731
  1063
  There is new short syntax "UN i<=n. A" for "UN i:{0..n}. A". There is
wenzelm@14731
  1064
  also an x-symbol version with subscripts "\<Union>\<^bsub>i <= n\<^esub>. A"
kleing@14418
  1065
  like in normal math, and corresponding versions for < and for intersection.
kleing@14418
  1066
nipkow@15677
  1067
* HOL/List: Ordering "lexico" is renamed "lenlex" and the standard
nipkow@15677
  1068
  lexicographic dictonary ordering has been added as "lexord".
nipkow@15677
  1069
paulson@14401
  1070
* ML: the legacy theory structures Int and List have been removed. They had
paulson@14401
  1071
  conflicted with ML Basis Library structures having the same names.
nipkow@14380
  1072
webertj@14464
  1073
* 'refute' command added to search for (finite) countermodels.  Only works
webertj@14464
  1074
  for a fragment of HOL.  The installation of an external SAT solver is
webertj@14464
  1075
  highly recommended.  See "HOL/Refute.thy" for details.
webertj@14464
  1076
berghofe@14602
  1077
* 'quickcheck' command: Allows to find counterexamples by evaluating
berghofe@14602
  1078
  formulae under an assignment of free variables to random values.
berghofe@14602
  1079
  In contrast to 'refute', it can deal with inductive datatypes,
berghofe@14602
  1080
  but cannot handle quantifiers. See "HOL/ex/Quickcheck_Examples.thy"
berghofe@14602
  1081
  for examples.
webertj@14464
  1082
wenzelm@14606
  1083
oheimb@14536
  1084
*** HOLCF ***
oheimb@14536
  1085
oheimb@14536
  1086
* Streams now come with concatenation and are part of the HOLCF image
oheimb@14536
  1087
wenzelm@14572
  1088
wenzelm@14572
  1089
kleing@14136
  1090
New in Isabelle2003 (May 2003)
wenzelm@14606
  1091
------------------------------
kleing@14136
  1092
wenzelm@13280
  1093
*** General ***
wenzelm@13280
  1094
berghofe@13618
  1095
* Provers/simplifier:
berghofe@13618
  1096
nipkow@13781
  1097
  - Completely reimplemented method simp (ML: Asm_full_simp_tac):
berghofe@13618
  1098
    Assumptions are now subject to complete mutual simplification,
berghofe@13618
  1099
    not just from left to right. The simplifier now preserves
berghofe@13618
  1100
    the order of assumptions.
berghofe@13618
  1101
berghofe@13618
  1102
    Potential INCOMPATIBILITY:
berghofe@13618
  1103
nipkow@13781
  1104
    -- simp sometimes diverges where the old version did
nipkow@13781
  1105
       not, e.g. invoking simp on the goal
berghofe@13618
  1106
berghofe@13618
  1107
        [| P (f x); y = x; f x = f y |] ==> Q
berghofe@13618
  1108
nipkow@13781
  1109
       now gives rise to the infinite reduction sequence
nipkow@13781
  1110
nipkow@13781
  1111
        P(f x) --(f x = f y)--> P(f y) --(y = x)--> P(f x) --(f x = f y)--> ...
nipkow@13781
  1112
nipkow@13781
  1113
       Using "simp (asm_lr)" (ML: Asm_lr_simp_tac) instead often solves this
nipkow@13781
  1114
       kind of problem.
nipkow@13781
  1115
nipkow@13781
  1116
    -- Tactics combining classical reasoner and simplification (such as auto)
nipkow@13781
  1117
       are also affected by this change, because many of them rely on
nipkow@13781
  1118
       simp. They may sometimes diverge as well or yield a different numbers
nipkow@13781
  1119
       of subgoals. Try to use e.g. force, fastsimp, or safe instead of auto
nipkow@13781
  1120
       in case of problems. Sometimes subsequent calls to the classical
nipkow@13781
  1121
       reasoner will fail because a preceeding call to the simplifier too
nipkow@13781
  1122
       eagerly simplified the goal, e.g. deleted redundant premises.
berghofe@13618
  1123
berghofe@13618
  1124
  - The simplifier trace now shows the names of the applied rewrite rules
berghofe@13618
  1125
nipkow@13829
  1126
  - You can limit the number of recursive invocations of the simplifier
nipkow@13829
  1127
    during conditional rewriting (where the simplifie tries to solve the
nipkow@13829
  1128
    conditions before applying the rewrite rule):
nipkow@13829
  1129
    ML "simp_depth_limit := n"
nipkow@13829
  1130
    where n is an integer. Thus you can force termination where previously
nipkow@13829
  1131
    the simplifier would diverge.
nipkow@13829
  1132
ballarin@13835
  1133
  - Accepts free variables as head terms in congruence rules.  Useful in Isar.
nipkow@13829
  1134
ballarin@13938
  1135
  - No longer aborts on failed congruence proof.  Instead, the
ballarin@13938
  1136
    congruence is ignored.
ballarin@13938
  1137
berghofe@14008
  1138
* Pure: New generic framework for extracting programs from constructive
berghofe@14008
  1139
  proofs. See HOL/Extraction.thy for an example instantiation, as well
berghofe@14008
  1140
  as HOL/Extraction for some case studies.
berghofe@14008
  1141
nipkow@13868
  1142
* Pure: The main goal of the proof state is no longer shown by default, only
nipkow@13868
  1143
the subgoals. This behaviour is controlled by a new flag.
ballarin@13835
  1144
   PG menu: Isabelle/Isar -> Settings -> Show Main Goal
nipkow@13815
  1145
(ML: Proof.show_main_goal).
nipkow@13815
  1146
nipkow@13815
  1147
* Pure: You can find all matching introduction rules for subgoal 1, i.e. all
nipkow@13815
  1148
rules whose conclusion matches subgoal 1:
nipkow@13815
  1149
      PG menu: Isabelle/Isar -> Show me -> matching rules
nipkow@13815
  1150
The rules are ordered by how closely they match the subgoal.
nipkow@13815
  1151
In particular, rules that solve a subgoal outright are displayed first
nipkow@13815
  1152
(or rather last, the way they are printed).
nipkow@13815
  1153
(ML: ProofGeneral.print_intros())
nipkow@13815
  1154
nipkow@13815
  1155
* Pure: New flag trace_unify_fail causes unification to print
nipkow@13781
  1156
diagnostic information (PG: in trace buffer) when it fails. This is
nipkow@13781
  1157
useful for figuring out why single step proofs like rule, erule or
nipkow@13781
  1158
assumption failed.
nipkow@13781
  1159
nipkow@13815
  1160
* Pure: Locale specifications now produce predicate definitions
wenzelm@13410
  1161
according to the body of text (covering assumptions modulo local
wenzelm@13410
  1162
definitions); predicate "loc_axioms" covers newly introduced text,
wenzelm@13410
  1163
while "loc" is cumulative wrt. all included locale expressions; the
wenzelm@13410
  1164
latter view is presented only on export into the global theory
wenzelm@13410
  1165
context; potential INCOMPATIBILITY, use "(open)" option to fall back
wenzelm@13410
  1166
on the old view without predicates;
wenzelm@13410
  1167
wenzelm@13459
  1168
* Pure: predefined locales "var" and "struct" are useful for sharing
wenzelm@13459
  1169
parameters (as in CASL, for example); just specify something like
wenzelm@13459
  1170
``var x + var y + struct M'' as import;
wenzelm@13459
  1171
wenzelm@13463
  1172
* Pure: improved thms_containing: proper indexing of facts instead of
wenzelm@13463
  1173
raw theorems; check validity of results wrt. current name space;
wenzelm@13463
  1174
include local facts of proof configuration (also covers active
wenzelm@13541
  1175
locales), cover fixed variables in index; may use "_" in term
wenzelm@13541
  1176
specification; an optional limit for the number of printed facts may
wenzelm@13541
  1177
be given (the default is 40);
wenzelm@13541
  1178
wenzelm@13541
  1179
* Pure: disallow duplicate fact bindings within new-style theory files
wenzelm@13541
  1180
(batch-mode only);
wenzelm@13540
  1181
wenzelm@13463
  1182
* Provers: improved induct method: assumptions introduced by case
wenzelm@13463
  1183
"foo" are split into "foo.hyps" (from the rule) and "foo.prems" (from
wenzelm@13463
  1184
the goal statement); "foo" still refers to all facts collectively;
wenzelm@13463
  1185
paulson@13550
  1186
* Provers: the function blast.overloaded has been removed: all constants
paulson@13550
  1187
are regarded as potentially overloaded, which improves robustness in exchange
paulson@13550
  1188
for slight decrease in efficiency;
paulson@13550
  1189
nipkow@13781
  1190
* Provers/linorder: New generic prover for transitivity reasoning over
nipkow@13781
  1191
linear orders.  Note: this prover is not efficient!
nipkow@13781
  1192
wenzelm@13522
  1193
* Isar: preview of problems to finish 'show' now produce an error
wenzelm@13522
  1194
rather than just a warning (in interactive mode);
wenzelm@13522
  1195
wenzelm@13280
  1196
nipkow@13158
  1197
*** HOL ***
nipkow@13158
  1198
nipkow@13899
  1199
* arith(_tac)
nipkow@13899
  1200
nipkow@13899
  1201
 - Produces a counter example if it cannot prove a goal.
nipkow@13899
  1202
   Note that the counter example may be spurious if the goal is not a formula
nipkow@13899
  1203
   of quantifier-free linear arithmetic.
nipkow@13899
  1204
   In ProofGeneral the counter example appears in the trace buffer.
nipkow@13899
  1205
nipkow@13899
  1206
 - Knows about div k and mod k where k is a numeral of type nat or int.
nipkow@13899
  1207
nipkow@13899
  1208
 - Calls full Presburger arithmetic (by Amine Chaieb) if quantifier-free
nipkow@13899
  1209
   linear arithmetic fails. This takes account of quantifiers and divisibility.
wenzelm@14731
  1210
   Presburger arithmetic can also be called explicitly via presburger(_tac).
nipkow@13899
  1211
nipkow@13899
  1212
* simp's arithmetic capabilities have been enhanced a bit: it now
nipkow@13899
  1213
takes ~= in premises into account (by performing a case split);
nipkow@13899
  1214
nipkow@13899
  1215
* simp reduces "m*(n div m) + n mod m" to n, even if the two summands
nipkow@13899
  1216
are distributed over a sum of terms;
nipkow@13899
  1217
ballarin@13735
  1218
* New tactic "trans_tac" and method "trans" instantiate
ballarin@13735
  1219
Provers/linorder.ML for axclasses "order" and "linorder" (predicates
wenzelm@14731
  1220
"<=", "<" and "=").
wenzelm@14731
  1221
wenzelm@14731
  1222
* function INCOMPATIBILITIES: Pi-sets have been redefined and moved from main
paulson@13587
  1223
HOL to Library/FuncSet; constant "Fun.op o" is now called "Fun.comp";
paulson@13587
  1224
wenzelm@13443
  1225
* 'typedef' command has new option "open" to suppress the set
wenzelm@13443
  1226
definition;
wenzelm@13443
  1227
wenzelm@13522
  1228
* functions Min and Max on finite sets have been introduced (theory
wenzelm@13522
  1229
Finite_Set);
nipkow@13492
  1230
wenzelm@13443
  1231
* attribute [symmetric] now works for relations as well; it turns
wenzelm@13443
  1232
(x,y) : R^-1 into (y,x) : R, and vice versa;
wenzelm@13443
  1233
nipkow@13613
  1234
* induct over a !!-quantified statement (say !!x1..xn):
nipkow@13613
  1235
  each "case" automatically performs "fix x1 .. xn" with exactly those names.
nipkow@13613
  1236
nipkow@13899
  1237
* Map: `empty' is no longer a constant but a syntactic abbreviation for
nipkow@13899
  1238
%x. None. Warning: empty_def now refers to the previously hidden definition
nipkow@13899
  1239
of the empty set.
nipkow@13899
  1240
ballarin@14018
  1241
* Algebra: formalization of classical algebra.  Intended as base for
ballarin@14018
  1242
any algebraic development in Isabelle.  Currently covers group theory
ballarin@14018
  1243
(up to Sylow's theorem) and ring theory (Universal Property of
ballarin@14018
  1244
Univariate Polynomials).  Contributions welcome;
paulson@13960
  1245
paulson@13960
  1246
* GroupTheory: deleted, since its material has been moved to Algebra;
paulson@13960
  1247
wenzelm@14731
  1248
* Complex: new directory of the complex numbers with numeric constants,
wenzelm@14731
  1249
nonstandard complex numbers, and some complex analysis, standard and
paulson@13966
  1250
nonstandard (Jacques Fleuriot);
paulson@13966
  1251
paulson@13966
  1252
* HOL-Complex: new image for analysis, replacing HOL-Real and HOL-Hyperreal;
paulson@13966
  1253
wenzelm@14731
  1254
* Hyperreal: introduced Gauge integration and hyperreal logarithms (Jacques
paulson@13966
  1255
Fleuriot);
paulson@13960
  1256
wenzelm@13549
  1257
* Real/HahnBanach: updated and adapted to locales;
wenzelm@13549
  1258
ballarin@13995
  1259
* NumberTheory: added Gauss's law of quadratic reciprocity (by Avigad,
ballarin@13995
  1260
Gray and Kramer);
paulson@13872
  1261
paulson@13872
  1262
* UNITY: added the Meier-Sanders theory of progress sets;
paulson@13872
  1263
kleing@14011
  1264
* MicroJava: bytecode verifier and lightweight bytecode verifier
kleing@14011
  1265
as abstract algorithms, instantiated to the JVM;
kleing@14011
  1266
schirmer@14010
  1267
* Bali: Java source language formalization. Type system, operational
schirmer@14010
  1268
semantics, axiomatic semantics. Supported language features:
schirmer@14010
  1269
classes, interfaces, objects,virtual methods, static methods,
schirmer@14010
  1270
static/instance fields, arrays, access modifiers, definite
schirmer@14010
  1271
assignment, exceptions.
wenzelm@13549
  1272
kleing@14011
  1273
wenzelm@13549
  1274
*** ZF ***
wenzelm@13549
  1275
webertj@15154
  1276
* ZF/Constructible: consistency proof for AC (Gdel's constructible
wenzelm@13549
  1277
universe, etc.);
wenzelm@13549
  1278
paulson@13872
  1279
* Main ZF: virtually all theories converted to new-style format;
nipkow@13518
  1280
wenzelm@13280
  1281
wenzelm@13478
  1282
*** ML ***
wenzelm@13478
  1283
wenzelm@13478
  1284
* Pure: Tactic.prove provides sane interface for internal proofs;
wenzelm@13478
  1285
omits the infamous "standard" operation, so this is more appropriate
wenzelm@13478
  1286
than prove_goalw_cterm in many situations (e.g. in simprocs);
wenzelm@13478
  1287
wenzelm@13478
  1288
* Pure: improved error reporting of simprocs;
wenzelm@13478
  1289
wenzelm@13478
  1290
* Provers: Simplifier.simproc(_i) provides sane interface for setting
wenzelm@13478
  1291
up simprocs;
wenzelm@13478
  1292
wenzelm@13478
  1293
kleing@13953
  1294
*** Document preparation ***
kleing@13953
  1295
kleing@13953
  1296
* uses \par instead of \\ for line breaks in theory text. This may
kleing@13953
  1297
shift some page breaks in large documents. To get the old behaviour
kleing@13953
  1298
use \renewcommand{\isanewline}{\mbox{}\\\mbox{}} in root.tex.
kleing@13953
  1299
wenzelm@14731
  1300
* minimized dependencies of isabelle.sty and isabellesym.sty on
kleing@13953
  1301
other packages
kleing@13953
  1302
kleing@13953
  1303
* \<euro> now needs package babel/greek instead of marvosym (which
kleing@13953
  1304
broke \Rightarrow)
kleing@13953
  1305
wenzelm@14731
  1306
* normal size for \<zero>...\<nine> (uses \mathbf instead of
kleing@13954
  1307
textcomp package)
kleing@13953
  1308
wenzelm@13280
  1309
wenzelm@14572
  1310
wenzelm@12984
  1311
New in Isabelle2002 (March 2002)
wenzelm@12984
  1312
--------------------------------
wenzelm@11474
  1313
wenzelm@11572
  1314
*** Document preparation ***
wenzelm@11572
  1315
wenzelm@11842
  1316
* greatly simplified document preparation setup, including more
wenzelm@11842
  1317
graceful interpretation of isatool usedir -i/-d/-D options, and more
wenzelm@11842
  1318
instructive isatool mkdir; users should basically be able to get
wenzelm@12899
  1319
started with "isatool mkdir HOL Test && isatool make"; alternatively,
wenzelm@12899
  1320
users may run a separate document processing stage manually like this:
wenzelm@12899
  1321
"isatool usedir -D output HOL Test && isatool document Test/output";
wenzelm@11842
  1322
wenzelm@11842
  1323
* theory dependency graph may now be incorporated into documents;
wenzelm@11842
  1324
isatool usedir -g true will produce session_graph.eps/.pdf for use
wenzelm@11842
  1325
with \includegraphics of LaTeX;
wenzelm@11842
  1326
wenzelm@11864
  1327
* proper spacing of consecutive markup elements, especially text
wenzelm@11864
  1328
blocks after section headings;
wenzelm@11864
  1329
wenzelm@11572
  1330
* support bold style (for single symbols only), input syntax is like
wenzelm@11572
  1331
this: "\<^bold>\<alpha>" or "\<^bold>A";
wenzelm@11572
  1332
wenzelm@11814
  1333
* \<bullet> is now output as bold \cdot by default, which looks much
wenzelm@11572
  1334
better in printed text;
wenzelm@11572
  1335
wenzelm@11712
  1336
* added default LaTeX bindings for \<tturnstile> and \<TTurnstile>;
wenzelm@11712
  1337
note that these symbols are currently unavailable in Proof General /
wenzelm@12769
  1338
X-Symbol; new symbols \<zero>, \<one>, ..., \<nine>, and \<euro>;
wenzelm@12690
  1339
wenzelm@12690
  1340
* isatool latex no longer depends on changed TEXINPUTS, instead
wenzelm@12690
  1341
isatool document copies the Isabelle style files to the target
wenzelm@12690
  1342
location;
wenzelm@11712
  1343
wenzelm@11572
  1344
wenzelm@11633
  1345
*** Isar ***
wenzelm@11633
  1346
wenzelm@12312
  1347
* Pure/Provers: improved proof by cases and induction;
wenzelm@12280
  1348
  - 'case' command admits impromptu naming of parameters (such as
wenzelm@12280
  1349
    "case (Suc n)");
wenzelm@12280
  1350
  - 'induct' method divinates rule instantiation from the inductive
wenzelm@12280
  1351
    claim; no longer requires excessive ?P bindings for proper
wenzelm@12280
  1352
    instantiation of cases;
wenzelm@12280
  1353
  - 'induct' method properly enumerates all possibilities of set/type
wenzelm@12280
  1354
    rules; as a consequence facts may be also passed through *type*
wenzelm@12280
  1355
    rules without further ado;
wenzelm@12280
  1356
  - 'induct' method now derives symbolic cases from the *rulified*
wenzelm@12280
  1357
    rule (before it used to rulify cases stemming from the internal
wenzelm@12280
  1358
    atomized version); this means that the context of a non-atomic
wenzelm@12280
  1359
    statement becomes is included in the hypothesis, avoiding the
wenzelm@12280
  1360
    slightly cumbersome show "PROP ?case" form;
wenzelm@12280
  1361
  - 'induct' may now use elim-style induction rules without chaining
wenzelm@12280
  1362
    facts, using ``missing'' premises from the goal state; this allows
wenzelm@12280
  1363
    rules stemming from inductive sets to be applied in unstructured
wenzelm@12280
  1364
    scripts, while still benefitting from proper handling of non-atomic
wenzelm@12280
  1365
    statements; NB: major inductive premises need to be put first, all
wenzelm@12280
  1366
    the rest of the goal is passed through the induction;
wenzelm@12280
  1367
  - 'induct' proper support for mutual induction involving non-atomic
wenzelm@12280
  1368
    rule statements (uses the new concept of simultaneous goals, see
wenzelm@12280
  1369
    below);
wenzelm@12853
  1370
  - append all possible rule selections, but only use the first
wenzelm@12853
  1371
    success (no backtracking);
wenzelm@11995
  1372
  - removed obsolete "(simplified)" and "(stripped)" options of methods;
wenzelm@12754
  1373
  - undeclared rule case names default to numbers 1, 2, 3, ...;
wenzelm@12754
  1374
  - added 'print_induct_rules' (covered by help item in recent Proof
wenzelm@12754
  1375
    General versions);
wenzelm@11995
  1376
  - moved induct/cases attributes to Pure, methods to Provers;
wenzelm@11995
  1377
  - generic method setup instantiated for FOL and HOL;
wenzelm@11986
  1378
wenzelm@12163
  1379
* Pure: support multiple simultaneous goal statements, for example
wenzelm@12163
  1380
"have a: A and b: B" (same for 'theorem' etc.); being a pure
wenzelm@12163
  1381
meta-level mechanism, this acts as if several individual goals had
wenzelm@12163
  1382
been stated separately; in particular common proof methods need to be
wenzelm@12163
  1383
repeated in order to cover all claims; note that a single elimination
wenzelm@12163
  1384
step is *not* sufficient to establish the two conjunctions, so this
wenzelm@12163
  1385
fails:
wenzelm@12163
  1386
wenzelm@12163
  1387
  assume "A & B" then have A and B ..   (*".." fails*)
wenzelm@12163
  1388
wenzelm@12163
  1389
better use "obtain" in situations as above; alternative refer to
wenzelm@12163
  1390
multi-step methods like 'auto', 'simp_all', 'blast+' etc.;
wenzelm@12163
  1391
wenzelm@12078
  1392
* Pure: proper integration with ``locales''; unlike the original
webertj@15154
  1393
version by Florian Kammller, Isar locales package high-level proof
wenzelm@12078
  1394
contexts rather than raw logical ones (e.g. we admit to include
wenzelm@12280
  1395
attributes everywhere); operations on locales include merge and
wenzelm@12964
  1396
rename; support for implicit arguments (``structures''); simultaneous
wenzelm@12964
  1397
type-inference over imports and text; see also HOL/ex/Locales.thy for
wenzelm@12964
  1398
some examples;
wenzelm@12078
  1399
wenzelm@12707
  1400
* Pure: the following commands have been ``localized'', supporting a
wenzelm@12707
  1401
target locale specification "(in name)": 'lemma', 'theorem',
wenzelm@12707
  1402
'corollary', 'lemmas', 'theorems', 'declare'; the results will be
wenzelm@12707
  1403
stored both within the locale and at the theory level (exported and
wenzelm@12707
  1404
qualified by the locale name);
wenzelm@12707
  1405
wenzelm@12964
  1406
* Pure: theory goals may now be specified in ``long'' form, with
wenzelm@12964
  1407
ad-hoc contexts consisting of arbitrary locale elements. for example
wenzelm@12964
  1408
``lemma foo: fixes x assumes "A x" shows "B x"'' (local syntax and
wenzelm@12964
  1409
definitions may be given, too); the result is a meta-level rule with
wenzelm@12964
  1410
the context elements being discharged in the obvious way;
wenzelm@12964
  1411
wenzelm@12964
  1412
* Pure: new proof command 'using' allows to augment currently used
wenzelm@12964
  1413
facts after a goal statement ('using' is syntactically analogous to
wenzelm@12964
  1414
'apply', but acts on the goal's facts only); this allows chained facts
wenzelm@12964
  1415
to be separated into parts given before and after a claim, as in
wenzelm@12964
  1416
``from a and b have C using d and e <proof>'';
wenzelm@12078
  1417
wenzelm@11722
  1418
* Pure: renamed "antecedent" case to "rule_context";
wenzelm@11722
  1419
wenzelm@12964
  1420
* Pure: new 'judgment' command records explicit information about the
wenzelm@12964
  1421
object-logic embedding (used by several tools internally); no longer
wenzelm@12964
  1422
use hard-wired "Trueprop";
wenzelm@12964
  1423
wenzelm@11738
  1424
* Pure: added 'corollary' command;
wenzelm@11738
  1425
wenzelm@11722
  1426
* Pure: fixed 'token_translation' command;
wenzelm@11722
  1427
wenzelm@11899
  1428
* Pure: removed obsolete 'exported' attribute;
wenzelm@11899
  1429
wenzelm@11933
  1430
* Pure: dummy pattern "_" in is/let is now automatically lifted over
wenzelm@11933
  1431
bound variables: "ALL x. P x --> Q x" (is "ALL x. _ --> ?C x")
wenzelm@11899
  1432
supersedes more cumbersome ... (is "ALL x. _ x --> ?C x");
wenzelm@11899
  1433
wenzelm@11952
  1434
* Pure: method 'atomize' presents local goal premises as object-level
wenzelm@11952
  1435
statements (atomic meta-level propositions); setup controlled via
wenzelm@11952
  1436
rewrite rules declarations of 'atomize' attribute; example
wenzelm@11952
  1437
application: 'induct' method with proper rule statements in improper
wenzelm@11952
  1438
proof *scripts*;
wenzelm@11952
  1439
wenzelm@12106
  1440
* Pure: emulation of instantiation tactics (rule_tac, cut_tac, etc.)
wenzelm@12106
  1441
now consider the syntactic context of assumptions, giving a better
wenzelm@12106
  1442
chance to get type-inference of the arguments right (this is
wenzelm@12106
  1443
especially important for locales);
wenzelm@12106
  1444
wenzelm@12312
  1445
* Pure: "sorry" no longer requires quick_and_dirty in interactive
wenzelm@12312
  1446
mode;
wenzelm@12312
  1447
wenzelm@12405
  1448
* Pure/obtain: the formal conclusion "thesis", being marked as
wenzelm@12405
  1449
``internal'', may no longer be reference directly in the text;
wenzelm@12405
  1450
potential INCOMPATIBILITY, may need to use "?thesis" in rare
wenzelm@12405
  1451
situations;
wenzelm@12405
  1452
wenzelm@12405
  1453
* Pure: generic 'sym' attribute which declares a rule both as pure
wenzelm@12405
  1454
'elim?' and for the 'symmetric' operation;
wenzelm@12405
  1455
wenzelm@12877
  1456
* Pure: marginal comments ``--'' may now occur just anywhere in the
wenzelm@12877
  1457
text; the fixed correlation with particular command syntax has been
wenzelm@12877
  1458
discontinued;
wenzelm@12877
  1459
berghofe@13023
  1460
* Pure: new method 'rules' is particularly well-suited for proof
berghofe@13023
  1461
search in intuitionistic logic; a bit slower than 'blast' or 'fast',
berghofe@13023
  1462
but often produces more compact proof terms with less detours;
berghofe@13023
  1463
wenzelm@12364
  1464
* Pure/Provers/classical: simplified integration with pure rule
wenzelm@12364
  1465
attributes and methods; the classical "intro?/elim?/dest?"
wenzelm@12364
  1466
declarations coincide with the pure ones; the "rule" method no longer
wenzelm@12364
  1467
includes classically swapped intros; "intro" and "elim" methods no
wenzelm@12364
  1468
longer pick rules from the context; also got rid of ML declarations
wenzelm@12364
  1469
AddXIs/AddXEs/AddXDs; all of this has some potential for
wenzelm@12364
  1470
INCOMPATIBILITY;
wenzelm@12364
  1471
wenzelm@12405
  1472
* Provers/classical: attribute 'swapped' produces classical inversions
wenzelm@12405
  1473
of introduction rules;
wenzelm@12405
  1474
wenzelm@12364
  1475
* Provers/simplifier: 'simplified' attribute may refer to explicit
wenzelm@12364
  1476
rules instead of full simplifier context; 'iff' attribute handles
wenzelm@12364
  1477
conditional rules;
wenzelm@11936
  1478
wenzelm@11745
  1479
* HOL: 'typedef' now allows alternative names for Rep/Abs morphisms;
wenzelm@11745
  1480
wenzelm@11690
  1481
* HOL: 'recdef' now fails on unfinished automated proofs, use
wenzelm@11633
  1482
"(permissive)" option to recover old behavior;
wenzelm@11633
  1483
wenzelm@11933
  1484
* HOL: 'inductive' no longer features separate (collective) attributes
wenzelm@11933
  1485
for 'intros' (was found too confusing);
wenzelm@11933
  1486
wenzelm@12405
  1487
* HOL: properly declared induction rules less_induct and
wenzelm@12405
  1488
wf_induct_rule;
wenzelm@12405
  1489
kleing@11788
  1490
wenzelm@11474
  1491
*** HOL ***
wenzelm@11474
  1492
wenzelm@11702
  1493
* HOL: moved over to sane numeral syntax; the new policy is as
wenzelm@11702
  1494
follows:
wenzelm@11702
  1495
wenzelm@11702
  1496
  - 0 and 1 are polymorphic constants, which are defined on any
wenzelm@11702
  1497
  numeric type (nat, int, real etc.);
wenzelm@11702
  1498
wenzelm@11702
  1499
  - 2, 3, 4, ... and -1, -2, -3, ... are polymorphic numerals, based
wenzelm@11702
  1500
  binary representation internally;
wenzelm@11702
  1501
wenzelm@11702
  1502
  - type nat has special constructor Suc, and generally prefers Suc 0
wenzelm@11702
  1503
  over 1::nat and Suc (Suc 0) over 2::nat;
wenzelm@11702
  1504
wenzelm@12364
  1505
This change may cause significant problems of INCOMPATIBILITY; here
wenzelm@12364
  1506
are some hints on converting existing sources:
wenzelm@11702
  1507
wenzelm@11702
  1508
  - due to the new "num" token, "-0" and "-1" etc. are now atomic
wenzelm@11702
  1509
  entities, so expressions involving "-" (unary or binary minus) need
wenzelm@11702
  1510
  to be spaced properly;
wenzelm@11702
  1511
wenzelm@11702
  1512
  - existing occurrences of "1" may need to be constraint "1::nat" or
wenzelm@11702
  1513
  even replaced by Suc 0; similar for old "2";
wenzelm@11702
  1514
wenzelm@11702
  1515
  - replace "#nnn" by "nnn", and "#-nnn" by "-nnn";
wenzelm@11702
  1516
wenzelm@11702
  1517
  - remove all special provisions on numerals in proofs;
wenzelm@11702
  1518
wenzelm@13042
  1519
* HOL: simp rules nat_number expand numerals on nat to Suc/0
wenzelm@12837
  1520
representation (depends on bin_arith_simps in the default context);
wenzelm@12837
  1521
wenzelm@12736
  1522
* HOL: symbolic syntax for x^2 (numeral 2);
wenzelm@12736
  1523
wenzelm@12335
  1524
* HOL: the class of all HOL types is now called "type" rather than
wenzelm@12335
  1525
"term"; INCOMPATIBILITY, need to adapt references to this type class
wenzelm@12335
  1526
in axclass/classes, instance/arities, and (usually rare) occurrences
wenzelm@12335
  1527
in typings (of consts etc.); internally the class is called
wenzelm@12335
  1528
"HOL.type", ML programs should refer to HOLogic.typeS;
wenzelm@12335
  1529
wenzelm@12280
  1530
* HOL/record package improvements:
wenzelm@12280
  1531
  - new derived operations "fields" to build a partial record section,
wenzelm@12280
  1532
    "extend" to promote a fixed record to a record scheme, and
wenzelm@12280
  1533
    "truncate" for the reverse; cf. theorems "xxx.defs", which are *not*
wenzelm@12280
  1534
    declared as simp by default;
wenzelm@12587
  1535
  - shared operations ("more", "fields", etc.) now need to be always
wenzelm@12587
  1536
    qualified) --- potential INCOMPATIBILITY;
wenzelm@12280
  1537
  - removed "make_scheme" operations (use "make" with "extend") --
wenzelm@12280
  1538
    INCOMPATIBILITY;
wenzelm@11937
  1539
  - removed "more" class (simply use "term") -- INCOMPATIBILITY;
wenzelm@12253
  1540
  - provides cases/induct rules for use with corresponding Isar
wenzelm@12253
  1541
    methods (for concrete records, record schemes, concrete more
wenzelm@12280
  1542
    parts, and schematic more parts -- in that order);
wenzelm@11930
  1543
  - internal definitions directly based on a light-weight abstract
wenzelm@11930
  1544
    theory of product types over typedef rather than datatype;
wenzelm@11930
  1545
berghofe@13023
  1546
* HOL: generic code generator for generating executable ML code from
berghofe@13023
  1547
specifications; specific support for HOL constructs such as inductive
berghofe@13023
  1548
datatypes and sets, as well as recursive functions; can be invoked
berghofe@13023
  1549
via 'generate_code' theory section;
berghofe@13023
  1550
wenzelm@11933
  1551
* HOL: canonical cases/induct rules for n-tuples (n = 3..7);
wenzelm@11933
  1552
paulson@13824
  1553
* HOL: consolidated and renamed several theories.  In particular:
wenzelm@14731
  1554
        Ord.thy has been absorbed into HOL.thy
wenzelm@14731
  1555
        String.thy has been absorbed into List.thy
wenzelm@14731
  1556
wenzelm@11802
  1557
* HOL: concrete setsum syntax "\<Sum>i:A. b" == "setsum (%i. b) A"
wenzelm@11802
  1558
(beware of argument permutation!);
wenzelm@11802
  1559
wenzelm@11657
  1560
* HOL: linorder_less_split superseded by linorder_cases;
wenzelm@11657
  1561
wenzelm@12917
  1562
* HOL/List: "nodups" renamed to "distinct";
nipkow@12889
  1563
wenzelm@11633
  1564
* HOL: added "The" definite description operator; move Hilbert's "Eps"
paulson@13824
  1565
to peripheral theory "Hilbert_Choice"; some INCOMPATIBILITIES:
paulson@13824
  1566
  - Ex_def has changed, now need to use some_eq_ex
wenzelm@11437
  1567
wenzelm@11572
  1568
* HOL: made split_all_tac safe; EXISTING PROOFS MAY FAIL OR LOOP, so
wenzelm@11572
  1569
in this (rare) case use:
wenzelm@11572
  1570
wenzelm@11572
  1571
  delSWrapper "split_all_tac"
wenzelm@11572
  1572
  addSbefore ("unsafe_split_all_tac", unsafe_split_all_tac)
wenzelm@11572
  1573
wenzelm@11572
  1574
* HOL: added safe wrapper "split_conv_tac" to claset; EXISTING PROOFS
wenzelm@11474
  1575
MAY FAIL;
nipkow@11361
  1576
wenzelm@11572
  1577
* HOL: introduced f^n = f o ... o f; warning: due to the limits of
wenzelm@11572
  1578
Isabelle's type classes, ^ on functions and relations has too general
wenzelm@11572
  1579
a domain, namely ('a * 'b) set and 'a => 'b; this means that it may be
wenzelm@11572
  1580
necessary to attach explicit type constraints;
nipkow@11307
  1581
wenzelm@12917
  1582
* HOL/Relation: the prefix name of the infix "O" has been changed from
wenzelm@12917
  1583
"comp" to "rel_comp"; INCOMPATIBILITY: a few theorems have been
wenzelm@12917
  1584
renamed accordingly (eg "compI" -> "rel_compI").
nipkow@12489
  1585
wenzelm@11487
  1586
* HOL: syntax translations now work properly with numerals and records
wenzelm@11487
  1587
expressions;
wenzelm@11474
  1588
wenzelm@12457
  1589
* HOL: bounded abstraction now uses syntax "%" / "\<lambda>" instead
wenzelm@12457
  1590
of "lam" -- INCOMPATIBILITY;
wenzelm@11474
  1591
wenzelm@11933
  1592
* HOL: got rid of some global declarations (potential INCOMPATIBILITY
wenzelm@11933
  1593
for ML tools): const "()" renamed "Product_Type.Unity", type "unit"
wenzelm@11933
  1594
renamed "Product_Type.unit";
wenzelm@11611
  1595
nipkow@12564
  1596
* HOL: renamed rtrancl_into_rtrancl2 to converse_rtrancl_into_rtrancl
nipkow@12564
  1597
wenzelm@12924
  1598
* HOL: removed obsolete theorem "optionE" (use "option.exhaust", or
wenzelm@12924
  1599
the "cases" method);
wenzelm@12924
  1600
wenzelm@12597
  1601
* HOL/GroupTheory: group theory examples including Sylow's theorem (by
webertj@15154
  1602
Florian Kammller);
wenzelm@12597
  1603
wenzelm@12608
  1604
* HOL/IMP: updated and converted to new-style theory format; several
wenzelm@12608
  1605
parts turned into readable document, with proper Isar proof texts and
wenzelm@12608
  1606
some explanations (by Gerwin Klein);
wenzelm@12597
  1607
wenzelm@12734
  1608
* HOL-Real: added Complex_Numbers (by Gertrud Bauer);
wenzelm@12734
  1609
wenzelm@12690
  1610
* HOL-Hyperreal is now a logic image;
wenzelm@12690
  1611
wenzelm@11611
  1612
wenzelm@12022
  1613
*** HOLCF ***
wenzelm@12022
  1614
wenzelm@12622
  1615
* Isar: consts/constdefs supports mixfix syntax for continuous
wenzelm@12622
  1616
operations;
wenzelm@12622
  1617
wenzelm@12622
  1618
* Isar: domain package adapted to new-style theory format, e.g. see
wenzelm@12622
  1619
HOLCF/ex/Dnat.thy;
wenzelm@12622
  1620
wenzelm@12622
  1621
* theory Lift: proper use of rep_datatype lift instead of ML hacks --
wenzelm@12280
  1622
potential INCOMPATIBILITY; now use plain induct_tac instead of former
wenzelm@12280
  1623
lift.induct_tac, always use UU instead of Undef;
wenzelm@12022
  1624
wenzelm@12597
  1625
* HOLCF/IMP: updated and converted to new-style theory;
wenzelm@12597
  1626
wenzelm@12022
  1627
wenzelm@11474
  1628
*** ZF ***
wenzelm@11474
  1629
wenzelm@12622
  1630
* Isar: proper integration of logic-specific tools and packages,
wenzelm@12622
  1631
including theory commands '(co)inductive', '(co)datatype',
wenzelm@12622
  1632
'rep_datatype', 'inductive_cases', as well as methods 'ind_cases',
wenzelm@12622
  1633
'induct_tac', 'case_tac', and 'typecheck' (with attribute 'TC');
wenzelm@12622
  1634
wenzelm@12622
  1635
* theory Main no longer includes AC; for the Axiom of Choice, base
wenzelm@12622
  1636
your theory on Main_ZFC;
wenzelm@12622
  1637
wenzelm@12622
  1638
* the integer library now covers quotients and remainders, with many
wenzelm@12622
  1639
laws relating division to addition, multiplication, etc.;
paulson@12563
  1640
wenzelm@12280
  1641
* ZF/UNITY: Chandy and Misra's UNITY is now available in ZF, giving a
wenzelm@12280
  1642
typeless version of the formalism;
wenzelm@12280
  1643
wenzelm@13025
  1644
* ZF/AC, Coind, IMP, Resid: updated and converted to new-style theory
wenzelm@13025
  1645
format;
wenzelm@12608
  1646
wenzelm@12280
  1647
* ZF/Induct: new directory for examples of inductive definitions,
wenzelm@12608
  1648
including theory Multiset for multiset orderings; converted to
wenzelm@12608
  1649
new-style theory format;
wenzelm@12177
  1650
wenzelm@13025
  1651
* ZF: many new theorems about lists, ordinals, etc.;
paulson@12850
  1652
wenzelm@11474
  1653
wenzelm@11474
  1654
*** General ***
wenzelm@11474
  1655
wenzelm@12280
  1656
* Pure/kernel: meta-level proof terms (by Stefan Berghofer); reference
wenzelm@12280
  1657
variable proof controls level of detail: 0 = no proofs (only oracle
wenzelm@12280
  1658
dependencies), 1 = lemma dependencies, 2 = compact proof terms; see
wenzelm@12280
  1659
also ref manual for further ML interfaces;
wenzelm@12280
  1660
wenzelm@12280
  1661
* Pure/axclass: removed obsolete ML interface
wenzelm@12280
  1662
goal_subclass/goal_arity;
wenzelm@12280
  1663
wenzelm@12280
  1664
* Pure/syntax: new token syntax "num" for plain numerals (without "#"
wenzelm@12280
  1665
of "xnum"); potential INCOMPATIBILITY, since -0, -1 etc. are now
wenzelm@12280
  1666
separate tokens, so expressions involving minus need to be spaced
wenzelm@12280
  1667
properly;
wenzelm@12280
  1668
wenzelm@12312
  1669
* Pure/syntax: support non-oriented infixes, using keyword "infix"
wenzelm@12312
  1670
rather than "infixl" or "infixr";
wenzelm@12312
  1671
wenzelm@12312
  1672
* Pure/syntax: concrete syntax for dummy type variables admits genuine
wenzelm@12312
  1673
sort constraint specifications in type inference; e.g. "x::_::foo"
wenzelm@12312
  1674
ensures that the type of "x" is of sort "foo" (but not necessarily a
wenzelm@12312
  1675
type variable);
wenzelm@12280
  1676
wenzelm@12280
  1677
* Pure/syntax: print modes "type_brackets" and "no_type_brackets"
wenzelm@12280
  1678
control output of nested => (types); the default behavior is
wenzelm@12280
  1679
"type_brackets";
wenzelm@12280
  1680
wenzelm@12280
  1681
* Pure/syntax: builtin parse translation for "_constify" turns valued
wenzelm@11817
  1682
tokens into AST constants;
wenzelm@11474
  1683
wenzelm@12280
  1684
* Pure/syntax: prefer later declarations of translations and print
wenzelm@12280
  1685
translation functions; potential INCOMPATIBILITY: need to reverse
wenzelm@12280
  1686
multiple declarations for same syntax element constant;
wenzelm@12280
  1687
wenzelm@12832
  1688
* Pure/show_hyps reset by default (in accordance to existing Isar
wenzelm@12832
  1689
practice);
wenzelm@12832
  1690
wenzelm@12280
  1691
* Provers/classical: renamed addaltern to addafter, addSaltern to
wenzelm@12280
  1692
addSafter;
wenzelm@12280
  1693
wenzelm@12280
  1694
* Provers/clasimp: ``iff'' declarations now handle conditional rules
wenzelm@12280
  1695
as well;
wenzelm@12253
  1696
wenzelm@12538
  1697
* system: tested support for MacOS X; should be able to get Isabelle +
wenzelm@12538
  1698
Proof General to work in a plain Terminal after installing Poly/ML
wenzelm@12538
  1699
(e.g. from the Isabelle distribution area) and GNU bash alone
wenzelm@12538
  1700
(e.g. from http://www.apple.com); full X11, XEmacs and X-Symbol
wenzelm@12538
  1701
support requires further installations, e.g. from
wenzelm@12538
  1702
http://fink.sourceforge.net/);
wenzelm@12538
  1703
wenzelm@12280
  1704
* system: support Poly/ML 4.1.1 (able to manage larger heaps);
wenzelm@11551
  1705
wenzelm@12753
  1706
* system: reduced base memory usage by Poly/ML (approx. 20 MB instead
wenzelm@12753
  1707
of 40 MB), cf. ML_OPTIONS;
wenzelm@12753
  1708
wenzelm@11633
  1709
* system: Proof General keywords specification is now part of the
wenzelm@11633
  1710
Isabelle distribution (see etc/isar-keywords.el);
wenzelm@11633
  1711
wenzelm@12728
  1712
* system: support for persistent Proof General sessions (refrain from
wenzelm@12728
  1713
outdating all loaded theories on startup); user may create writable
wenzelm@12728
  1714
logic images like this: ``isabelle -q HOL Test'';
wenzelm@12597
  1715
wenzelm@11551
  1716
* system: smart selection of Isabelle process versus Isabelle
wenzelm@11572
  1717
interface, accommodates case-insensitive file systems (e.g. HFS+); may
wenzelm@11572
  1718
run both "isabelle" and "Isabelle" even if file names are badly
wenzelm@11572
  1719
damaged (executable inspects the case of the first letter of its own
wenzelm@11572
  1720
name); added separate "isabelle-process" and "isabelle-interface";
wenzelm@11551
  1721
wenzelm@12472
  1722
* system: refrain from any attempt at filtering input streams; no
wenzelm@12472
  1723
longer support ``8bit'' encoding of old isabelle font, instead proper
wenzelm@12472
  1724
iso-latin characters may now be used; the related isatools
wenzelm@12472
  1725
"symbolinput" and "nonascii" have disappeared as well;
wenzelm@12472
  1726
wenzelm@12472
  1727
* system: removed old "xterm" interface (the print modes "xterm" and
wenzelm@12472
  1728
"xterm_color" are still available for direct use in a suitable
wenzelm@12472
  1729
terminal);
wenzelm@12472
  1730
paulson@11314
  1731
oheimb@11169
  1732
wenzelm@11062
  1733
New in Isabelle99-2 (February 2001)
wenzelm@11062
  1734
-----------------------------------
wenzelm@11062
  1735
nipkow@10224
  1736
*** Overview of INCOMPATIBILITIES ***
nipkow@10224
  1737
paulson@11241
  1738
* HOL: please note that theories in the Library and elsewhere often use the
paulson@11241
  1739
new-style (Isar) format; to refer to their theorems in an ML script you must
wenzelm@12622
  1740
bind them to ML identifers by e.g.      val thm_name = thm "thm_name";
paulson@11241
  1741
wenzelm@11043
  1742
* HOL: inductive package no longer splits induction rule aggressively,
wenzelm@11043
  1743
but only as far as specified by the introductions given; the old
oheimb@11130
  1744
format may be recovered via ML function complete_split_rule or attribute
wenzelm@11043
  1745
'split_rule (complete)';
wenzelm@11043
  1746
wenzelm@10998
  1747
* HOL: induct renamed to lfp_induct, lfp_Tarski to lfp_unfold,
wenzelm@10998
  1748
gfp_Tarski to gfp_unfold;
nipkow@10224
  1749
paulson@10288
  1750
* HOL: contrapos, contrapos2 renamed to contrapos_nn, contrapos_pp;
paulson@10288
  1751
wenzelm@10858
  1752
* HOL: infix "dvd" now has priority 50 rather than 70 (because it is a
wenzelm@10858
  1753
relation); infix "^^" has been renamed "``"; infix "``" has been
wenzelm@10858
  1754
renamed "`"; "univalent" has been renamed "single_valued";
nipkow@10793
  1755
wenzelm@10998
  1756
* HOL/Real: "rinv" and "hrinv" replaced by overloaded "inverse"
wenzelm@10998
  1757
operation;
wenzelm@10998
  1758
nipkow@10868
  1759
* HOLCF: infix "`" has been renamed "$"; the symbol syntax is \<cdot>;
nipkow@10856
  1760
wenzelm@10391
  1761
* Isar: 'obtain' no longer declares "that" fact as simp/intro;
wenzelm@10391
  1762
wenzelm@10401
  1763
* Isar/HOL: method 'induct' now handles non-atomic goals; as a
wenzelm@10401
  1764
consequence, it is no longer monotonic wrt. the local goal context
wenzelm@10401
  1765
(which is now passed through the inductive cases);
wenzelm@10401
  1766
wenzelm@10976
  1767
* Document preparation: renamed standard symbols \<ll> to \<lless> and
wenzelm@10976
  1768
\<gg> to \<ggreater>;
wenzelm@10976
  1769
nipkow@10224
  1770
wenzelm@10245
  1771
*** Document preparation ***
wenzelm@10245
  1772
wenzelm@10858
  1773
* \isabellestyle{NAME} selects version of Isabelle output (currently
wenzelm@10858
  1774
available: are "it" for near math-mode best-style output, "sl" for
wenzelm@10858
  1775
slanted text style, and "tt" for plain type-writer; if no
wenzelm@10858
  1776
\isabellestyle command is given, output is according to slanted
wenzelm@10858
  1777
type-writer);
wenzelm@10858
  1778
wenzelm@10322
  1779
* support sub/super scripts (for single symbols only), input syntax is
wenzelm@10322
  1780
like this: "A\<^sup>*" or "A\<^sup>\<star>";
wenzelm@10322
  1781
wenzelm@10858
  1782
* some more standard symbols; see Appendix A of the system manual for
wenzelm@11062
  1783
the complete list of symbols defined in isabellesym.sty;
wenzelm@10858
  1784
wenzelm@10998
  1785
* improved isabelle style files; more abstract symbol implementation
wenzelm@10998
  1786
(should now use \isamath{...} and \isatext{...} in custom symbol
wenzelm@10998
  1787
definitions);
wenzelm@10998
  1788
wenzelm@10634
  1789
* antiquotation @{goals} and @{subgoals} for output of *dynamic* goals
wenzelm@10634
  1790
state; Note that presentation of goal states does not conform to
wenzelm@10634
  1791
actual human-readable proof documents.  Please do not include goal
wenzelm@10634
  1792
states into document output unless you really know what you are doing!
wenzelm@10322
  1793
wenzelm@11062
  1794
* proper indentation of antiquoted output with proportional LaTeX
wenzelm@11062
  1795
fonts;
wenzelm@10862
  1796
wenzelm@11050
  1797
* no_document ML operator temporarily disables LaTeX document
wenzelm@11050
  1798
generation;
wenzelm@11050
  1799
wenzelm@11062
  1800
* isatool unsymbolize tunes sources for plain ASCII communication;
wenzelm@11062
  1801
wenzelm@10322
  1802
wenzelm@10306
  1803
*** Isar ***
wenzelm@10306
  1804
wenzelm@10547
  1805
* Pure: Isar now suffers initial goal statements to contain unbound
wenzelm@10547
  1806
schematic variables (this does not conform to actual readable proof
wenzelm@10547
  1807
documents, due to unpredictable outcome and non-compositional proof
wenzelm@10547
  1808
checking); users who know what they are doing may use schematic goals
wenzelm@10547
  1809
for Prolog-style synthesis of proven results;
wenzelm@10547
  1810
wenzelm@10391
  1811
* Pure: assumption method (an implicit finishing) now handles actual
wenzelm@10391
  1812
rules as well;
wenzelm@10391
  1813
wenzelm@10391
  1814
* Pure: improved 'obtain' --- moved to Pure, insert "that" into
wenzelm@10391
  1815
initial goal, declare "that" only as Pure intro (only for single
wenzelm@10391
  1816
steps); the "that" rule assumption may now be involved in implicit
wenzelm@10391
  1817
finishing, thus ".." becomes a feasible for trivial obtains;
wenzelm@10391
  1818
wenzelm@10391
  1819
* Pure: default proof step now includes 'intro_classes'; thus trivial
wenzelm@10391
  1820
instance proofs may be performed by "..";
wenzelm@10391
  1821
wenzelm@10391
  1822
* Pure: ?thesis / ?this / "..." now work for pure meta-level
wenzelm@10391
  1823
statements as well;
wenzelm@10306
  1824
wenzelm@11097
  1825
* Pure: more robust selection of calculational rules;
wenzelm@11097
  1826
wenzelm@10858
  1827
* Pure: the builtin notion of 'finished' goal now includes the ==-refl
wenzelm@10858
  1828
rule (as well as the assumption rule);
wenzelm@10858
  1829
wenzelm@10858
  1830
* Pure: 'thm_deps' command visualizes dependencies of theorems and
wenzelm@10858
  1831
lemmas, using the graph browser tool;
wenzelm@10858
  1832
wenzelm@10944
  1833
* Pure: predict failure of "show" in interactive mode;
wenzelm@10944
  1834
wenzelm@11016
  1835
* Pure: 'thms_containing' now takes actual terms as arguments;
wenzelm@11016
  1836
wenzelm@10401
  1837
* HOL: improved method 'induct' --- now handles non-atomic goals
wenzelm@10401
  1838
(potential INCOMPATIBILITY); tuned error handling;
wenzelm@10401
  1839
wenzelm@10557
  1840
* HOL: cases and induct rules now provide explicit hints about the
wenzelm@10547
  1841
number of facts to be consumed (0 for "type" and 1 for "set" rules);
wenzelm@10547
  1842
any remaining facts are inserted into the goal verbatim;
wenzelm@10547
  1843
wenzelm@10858
  1844
* HOL: local contexts (aka cases) may now contain term bindings as
wenzelm@10858
  1845
well; the 'cases' and 'induct' methods new provide a ?case binding for
wenzelm@10858
  1846
the result to be shown in each case;
wenzelm@10858
  1847
wenzelm@10770
  1848
* HOL: added 'recdef_tc' command;
wenzelm@10770
  1849
wenzelm@11016
  1850
* isatool convert assists in eliminating legacy ML scripts;
wenzelm@11016
  1851
wenzelm@10306
  1852
wenzelm@10245
  1853
*** HOL ***
wenzelm@10245
  1854
wenzelm@10245
  1855
* HOL/Library: a collection of generic theories to be used together
wenzelm@10245
  1856
with main HOL; the theory loader path already includes this directory
wenzelm@10245
  1857
by default; the following existing theories have been moved here:
wenzelm@10245
  1858
HOL/Induct/Multiset, HOL/Induct/Acc (as Accessible_Part), HOL/While
wenzelm@10337
  1859
(as While_Combinator), HOL/Lex/Prefix (as List_Prefix);
wenzelm@10245
  1860
wenzelm@10966
  1861
* HOL/Unix: "Some aspects of Unix file-system security", a typical
wenzelm@10966
  1862
modelling and verification task performed in Isabelle/HOL +
wenzelm@10966
  1863
Isabelle/Isar + Isabelle document preparation (by Markus Wenzel).
wenzelm@10966
  1864
wenzelm@11094
  1865
* HOL/Algebra: special summation operator SUM no longer exists, it has
wenzelm@11094
  1866
been replaced by setsum; infix 'assoc' now has priority 50 (like
wenzelm@11094
  1867
'dvd'); axiom 'one_not_zero' has been moved from axclass 'ring' to
wenzelm@11094
  1868
'domain', this makes the theory consistent with mathematical
wenzelm@11094
  1869
literature;
wenzelm@11094
  1870
wenzelm@10514
  1871
* HOL basics: added overloaded operations "inverse" and "divide"
wenzelm@10726
  1872
(infix "/"), syntax for generic "abs" operation, generic summation
wenzelm@11094
  1873
operator \<Sum>;
wenzelm@10452
  1874
wenzelm@10391
  1875
* HOL/typedef: simplified package, provide more useful rules (see also
wenzelm@10391
  1876
HOL/subset.thy);
wenzelm@10391
  1877
wenzelm@10915
  1878
* HOL/datatype: induction rule for arbitrarily branching datatypes is
wenzelm@10915
  1879
now expressed as a proper nested rule (old-style tactic scripts may
wenzelm@10915
  1880
require atomize_strip_tac to cope with non-atomic premises);
wenzelm@10915
  1881
wenzelm@10915
  1882
* HOL: renamed theory "Prod" to "Product_Type", renamed "split" rule
wenzelm@10915
  1883
to "split_conv" (old name still available for compatibility);
wenzelm@10915
  1884
wenzelm@10915
  1885
* HOL: improved concrete syntax for strings (e.g. allows translation
wenzelm@10915
  1886
rules with string literals);
wenzelm@10915
  1887
paulson@12245
  1888
* HOL-Real-Hyperreal: this extends HOL-Real with the hyperreals
paulson@12245
  1889
 and Fleuriot's mechanization of analysis, including the transcendental
paulson@12245
  1890
 functions for the reals;
paulson@10756
  1891
wenzelm@11094
  1892
* HOL/Real, HOL/Hyperreal: improved arithmetic simplification;
wenzelm@10391
  1893
wenzelm@10858
  1894
paulson@10474
  1895
*** CTT ***
paulson@10474
  1896
wenzelm@10547
  1897
* CTT: x-symbol support for Pi, Sigma, -->, : (membership); note that
wenzelm@10547
  1898
"lam" is displayed as TWO lambda-symbols
paulson@10474
  1899
wenzelm@10547
  1900
* CTT: theory Main now available, containing everything (that is, Bool
wenzelm@10547
  1901
and Arith);
wenzelm@10547
  1902
paulson@10474
  1903
wenzelm@10391
  1904
*** General ***
wenzelm@10391
  1905
wenzelm@10547
  1906
* Pure: the Simplifier has been implemented properly as a derived rule
wenzelm@10547
  1907
outside of the actual kernel (at last!); the overall performance
wenzelm@10547
  1908
penalty in practical applications is about 50%, while reliability of
wenzelm@10547
  1909
the Isabelle inference kernel has been greatly improved;
wenzelm@10547
  1910
wenzelm@11112
  1911
* print modes "brackets" and "no_brackets" control output of nested =>
wenzelm@11112
  1912
(types) and ==> (props); the default behaviour is "brackets";
wenzelm@11112
  1913
wenzelm@10391
  1914
* Provers: fast_tac (and friends) now handle actual object-logic rules
wenzelm@10391
  1915
as assumptions as well;
wenzelm@10391
  1916
wenzelm@11124
  1917
* system: support Poly/ML 4.0;
wenzelm@11124
  1918
wenzelm@11124
  1919
* system: isatool install handles KDE version 1 or 2;
wenzelm@11124
  1920
wenzelm@10391
  1921
wenzelm@10245
  1922
wenzelm@10103
  1923
New in Isabelle99-1 (October 2000)
wenzelm@10103
  1924
----------------------------------
wenzelm@8015
  1925
wenzelm@10003
  1926
*** Overview of INCOMPATIBILITIES ***
paulson@8014
  1927
wenzelm@8848
  1928
* HOL: simplification of natural numbers is much changed; to partly
wenzelm@8848
  1929
recover the old behaviour (e.g. to prevent n+n rewriting to #2*n)
wenzelm@8848
  1930
issue the following ML commands:
wenzelm@8848
  1931
wenzelm@8848
  1932
  Delsimprocs Nat_Numeral_Simprocs.cancel_numerals;
wenzelm@8848
  1933
  Delsimprocs [Nat_Numeral_Simprocs.combine_numerals];
paulson@8788
  1934
wenzelm@10129
  1935
* HOL: simplification no longer dives into case-expressions; this is
wenzelm@10129
  1936
controlled by "t.weak_case_cong" for each datatype t;
wenzelm@10003
  1937
wenzelm@10003
  1938
* HOL: nat_less_induct renamed to less_induct;
wenzelm@10003
  1939
wenzelm@10003
  1940
* HOL: systematic renaming of the SOME (Eps) rules, may use isatool
wenzelm@10003
  1941
fixsome to patch .thy and .ML sources automatically;
paulson@8967
  1942
wenzelm@10003
  1943
  select_equality  -> some_equality
wenzelm@10003
  1944
  select_eq_Ex     -> some_eq_ex
wenzelm@10003
  1945
  selectI2EX       -> someI2_ex
wenzelm@10003
  1946
  selectI2         -> someI2
wenzelm@10003
  1947
  selectI          -> someI
wenzelm@10003
  1948
  select1_equality -> some1_equality
wenzelm@10003
  1949
  Eps_sym_eq       -> some_sym_eq_trivial
wenzelm@10003
  1950
  Eps_eq           -> some_eq_trivial
wenzelm@10003
  1951
wenzelm@10003
  1952
* HOL: exhaust_tac on datatypes superceded by new generic case_tac;
wenzelm@10003
  1953
wenzelm@10003
  1954
* HOL: removed obsolete theorem binding expand_if (refer to split_if
wenzelm@10003
  1955
instead);
wenzelm@10003
  1956
wenzelm@10003
  1957
* HOL: the recursion equations generated by 'recdef' are now called
wenzelm@10003
  1958
f.simps instead of f.rules;
wenzelm@10003
  1959
wenzelm@10003
  1960
* HOL: qed_spec_mp now also handles bounded ALL as well;
wenzelm@10003
  1961
wenzelm@10003
  1962
* HOL: 0 is now overloaded, so the type constraint ":: nat" may
wenzelm@10003
  1963
sometimes be needed;
wenzelm@10003
  1964
wenzelm@10003
  1965
* HOL: the constant for "f``x" is now "image" rather than "op ``";
paulson@8014
  1966
paulson@10065
  1967
* HOL: the constant for "f-``x" is now "vimage" rather than "op -``";
paulson@10065
  1968
wenzelm@9330
  1969
* HOL: the disjoint sum is now "<+>" instead of "Plus"; the cartesian
wenzelm@9330
  1970
product is now "<*>" instead of "Times"; the lexicographic product is
wenzelm@9330
  1971
now "<*lex*>" instead of "**";
nipkow@8705
  1972
wenzelm@10003
  1973
* HOL: theory Sexp is now in HOL/Induct examples (it used to be part
wenzelm@10003
  1974
of main HOL, but was unused); better use HOL's datatype package;
paulson@9971
  1975
wenzelm@10137
  1976
* HOL: removed "symbols" syntax for constant "override" of theory Map;
wenzelm@10137
  1977
the old syntax may be recovered as follows:
wenzelm@10137
  1978
wenzelm@10137
  1979
  syntax (symbols)
wenzelm@10137
  1980
    override  :: "('a ~=> 'b) => ('a ~=> 'b) => ('a ~=> 'b)"
wenzelm@10137
  1981
      (infixl "\\<oplus>" 100)
wenzelm@10137
  1982
wenzelm@8848
  1983
* HOL/Real: "rabs" replaced by overloaded "abs" function;
wenzelm@8848
  1984
wenzelm@8887
  1985
* HOL/ML: even fewer consts are declared as global (see theories Ord,
wenzelm@8887
  1986
Lfp, Gfp, WF); this only affects ML packages that refer to const names
wenzelm@8887
  1987
internally;
wenzelm@8887
  1988
wenzelm@10003
  1989
* HOL and ZF: syntax for quotienting wrt an equivalence relation
wenzelm@10003
  1990
changed from A/r to A//r;
wenzelm@9908
  1991
wenzelm@10003
  1992
* ZF: new treatment of arithmetic (nat & int) may break some old
wenzelm@10003
  1993
proofs;
wenzelm@8921
  1994
wenzelm@10003
  1995
* Isar: renamed some attributes (RS -> THEN, simplify -> simplified,
wenzelm@10003
  1996
rulify -> rule_format, elimify -> elim_format, ...);
paulson@9542
  1997
wenzelm@9941
  1998
* Isar/Provers: intro/elim/dest attributes changed; renamed
wenzelm@9941
  1999
intro/intro!/intro!! flags to intro!/intro/intro? (in most cases, one
wenzelm@9937
  2000
should have to change intro!! to intro? only); replaced "delrule" by
wenzelm@9937
  2001
"rule del";
wenzelm@9437
  2002
wenzelm@9612
  2003
* Isar/HOL: renamed "intrs" to "intros" in inductive definitions;
wenzelm@9612
  2004
wenzelm@9437
  2005
* Provers: strengthened force_tac by using new first_best_tac;
oheimb@9402
  2006
wenzelm@10003
  2007
* LaTeX document preparation: several changes of isabelle.sty (see
wenzelm@10003
  2008
lib/texinputs);
wenzelm@8729
  2009
paulson@8014
  2010
wenzelm@8487
  2011
*** Document preparation ***
wenzelm@8358
  2012
wenzelm@9198
  2013
* formal comments (text blocks etc.) in new-style theories may now
wenzelm@9753
  2014
contain antiquotations of thm/prop/term/typ/text to be presented
wenzelm@9753
  2015
according to latex print mode; concrete syntax is like this:
wenzelm@9753
  2016
@{term[show_types] "f(x) = a + x"};
wenzelm@9198
  2017
wenzelm@8358
  2018
* isatool mkdir provides easy setup of Isabelle session directories,
wenzelm@8518
  2019
including proper document sources;
wenzelm@8358
  2020
wenzelm@8358
  2021
* generated LaTeX sources are now deleted after successful run
wenzelm@8358
  2022
(isatool document -c); may retain a copy somewhere else via -D option
wenzelm@8358
  2023
of isatool usedir;
wenzelm@8358
  2024
wenzelm@8566
  2025
* isatool usedir -D now lets isatool latex -o sty update the Isabelle
wenzelm@10003
  2026
style files, achieving self-contained LaTeX sources and simplifying
wenzelm@10003
  2027
LaTeX debugging;
wenzelm@8566
  2028
wenzelm@8518
  2029
* old-style theories now produce (crude) LaTeX output as well;
wenzelm@8358
  2030
wenzelm@9057
  2031
* browser info session directories are now self-contained (may be put
wenzelm@9437
  2032
on WWW server seperately); improved graphs of nested sessions; removed
wenzelm@9437
  2033
graph for 'all sessions';
wenzelm@9057
  2034
wenzelm@10003
  2035
* several improvements in isabelle style files; \isabellestyle{it}
wenzelm@10003
  2036
produces fake math mode output; \isamarkupheader is now \section by
wenzelm@10003
  2037
default; see lib/texinputs/isabelle.sty etc.;
wenzelm@9489
  2038
wenzelm@8358
  2039
wenzelm@8184
  2040
*** Isar ***
wenzelm@8184
  2041
wenzelm@10003
  2042
* Isar/Pure: local results and corresponding term bindings are now
wenzelm@10003
  2043
subject to Hindley-Milner polymorphism (similar to ML); this
wenzelm@10003
  2044
accommodates incremental type-inference very nicely;
wenzelm@8283
  2045
wenzelm@10003
  2046
* Isar/Pure: new derived language element 'obtain' supports
wenzelm@10003
  2047
generalized existence reasoning;
wenzelm@8621
  2048
wenzelm@10003
  2049
* Isar/Pure: new calculational elements 'moreover' and 'ultimately'
wenzelm@10003
  2050
support accumulation of results, without applying any rules yet;
wenzelm@10003
  2051
useful to collect intermediate results without explicit name
wenzelm@10003
  2052
references, and for use with transitivity rules with more than 2
wenzelm@10003
  2053
premises;
wenzelm@8184
  2054
wenzelm@10003
  2055
* Isar/Pure: scalable support for case-analysis type proofs: new
wenzelm@10003
  2056
'case' language element refers to local contexts symbolically, as
wenzelm@10003
  2057
produced by certain proof methods; internally, case names are attached
wenzelm@10003
  2058
to theorems as "tags";
wenzelm@8440
  2059
wenzelm@10003
  2060
* Isar/Pure: theory command 'hide' removes declarations from
wenzelm@9330
  2061
class/type/const name spaces;
wenzelm@9330
  2062
wenzelm@10003
  2063
* Isar/Pure: theory command 'defs' supports option "(overloaded)" to
wenzelm@9330
  2064
indicate potential overloading;
wenzelm@9330
  2065
wenzelm@10003
  2066
* Isar/Pure: changed syntax of local blocks from {{ }} to { };
wenzelm@8621
  2067
wenzelm@10003
  2068
* Isar/Pure: syntax of sorts made 'inner', i.e. have to write
wenzelm@10003
  2069
"{a,b,c}" instead of {a,b,c};
wenzelm@9011
  2070
wenzelm@10003
  2071
* Isar/Pure now provides its own version of intro/elim/dest
wenzelm@10003
  2072
attributes; useful for building new logics, but beware of confusion
wenzelm@10003
  2073
with the version in Provers/classical;
wenzelm@9612
  2074
wenzelm@10003
  2075
* Isar/Pure: the local context of (non-atomic) goals is provided via
wenzelm@10003
  2076
case name 'antecedent';
wenzelm@8440
  2077
wenzelm@10003
  2078
* Isar/Pure: removed obsolete 'transfer' attribute (transfer of thms
wenzelm@10003
  2079
to the current context is now done automatically);
wenzelm@9383
  2080
wenzelm@10003
  2081
* Isar/Pure: theory command 'method_setup' provides a simple interface
wenzelm@10003
  2082
for definining proof methods in ML;
wenzelm@9612
  2083
wenzelm@10003
  2084
* Isar/Provers: intro/elim/dest attributes changed; renamed
wenzelm@9941
  2085
intro/intro!/intro!! flags to intro!/intro/intro? (INCOMPATIBILITY, in
wenzelm@9941
  2086
most cases, one should have to change intro!! to intro? only);
wenzelm@9941
  2087
replaced "delrule" by "rule del";
wenzelm@8283
  2088
wenzelm@10003
  2089
* Isar/Provers: new 'hypsubst' method, plain 'subst' method and
wenzelm@10003
  2090
'symmetric' attribute (the latter supercedes [RS sym]);
wenzelm@10003
  2091
wenzelm@10003
  2092
* Isar/Provers: splitter support (via 'split' attribute and 'simp'
wenzelm@10003
  2093
method modifier); 'simp' method: 'only:' modifier removes loopers as
wenzelm@10003
  2094
well (including splits);
wenzelm@10003
  2095
wenzelm@10003
  2096
* Isar/Provers: Simplifier and Classical methods now support all kind
wenzelm@10003
  2097
of modifiers used in the past, including 'cong', 'iff', etc.
wenzelm@10003
  2098
wenzelm@10003
  2099
* Isar/Provers: added 'fastsimp' and 'clarsimp' methods (combination
wenzelm@10003
  2100
of Simplifier and Classical reasoner);
wenzelm@10003
  2101
wenzelm@10003
  2102
* Isar/HOL: new proof method 'cases' and improved version of 'induct'
wenzelm@10003
  2103
now support named cases; major packages (inductive, datatype, primrec,
wenzelm@10003
  2104
recdef) support case names and properly name parameters;
wenzelm@9612
  2105
wenzelm@10003
  2106
* Isar/HOL: new transitivity rules for substitution in inequalities --
wenzelm@10003
  2107
monotonicity conditions are extracted to be proven at end of
wenzelm@10003
  2108
calculations;
wenzelm@10003
  2109
wenzelm@10003
  2110
* Isar/HOL: removed 'case_split' thm binding, should use 'cases' proof
wenzelm@10003
  2111
method anyway;
wenzelm@10003
  2112
wenzelm@10003
  2113
* Isar/HOL: removed old expand_if = split_if; theorems if_splits =
wenzelm@10003
  2114
split_if split_if_asm; datatype package provides theorems foo.splits =
wenzelm@10003
  2115
foo.split foo.split_asm for each datatype;
wenzelm@10003
  2116
wenzelm@10003
  2117
* Isar/HOL: tuned inductive package, rename "intrs" to "intros"
wenzelm@10003
  2118
(potential INCOMPATIBILITY), emulation of mk_cases feature for proof
wenzelm@10003
  2119
scripts: new 'inductive_cases' command and 'ind_cases' method; (Note:
wenzelm@10003
  2120
use "(cases (simplified))" method in proper proof texts);
wenzelm@10003
  2121
wenzelm@10003
  2122
* Isar/HOL: added global 'arith_split' attribute for 'arith' method;
wenzelm@10003
  2123
wenzelm@10003
  2124
* Isar: names of theorems etc. may be natural numbers as well;
wenzelm@10003
  2125
wenzelm@10003
  2126
* Isar: 'pr' command: optional arguments for goals_limit and
wenzelm@9724
  2127
ProofContext.prems_limit; no longer prints theory contexts, but only
wenzelm@9724
  2128
proof states;
wenzelm@8487
  2129
wenzelm@10003
  2130
* Isar: diagnostic commands 'pr', 'thm', 'prop', 'term', 'typ' admit
wenzelm@8518
  2131
additional print modes to be specified; e.g. "pr(latex)" will print
wenzelm@8518
  2132
proof state according to the Isabelle LaTeX style;
wenzelm@8487
  2133
wenzelm@10003
  2134
* Isar: improved support for emulating tactic scripts, including proof
wenzelm@9612
  2135
methods 'rule_tac' etc., 'cut_tac', 'thin_tac', 'subgoal_tac',
wenzelm@9612
  2136
'rename_tac', 'rotate_tac', 'tactic', and 'case_tac' / 'induct_tac'
wenzelm@9612
  2137
(for HOL datatypes);
wenzelm@8534
  2138
wenzelm@10003
  2139
* Isar: simplified (more robust) goal selection of proof methods: 1st
wenzelm@10003
  2140
goal, all goals, or explicit goal specifier (tactic emulation); thus
wenzelm@10003
  2141
'proof method scripts' have to be in depth-first order;
wenzelm@8673
  2142
wenzelm@10003
  2143
* Isar: tuned 'let' syntax: replaced 'as' keyword by 'and';
wenzelm@8729
  2144
wenzelm@10003
  2145
* Isar: removed 'help' command, which hasn't been too helpful anyway;
wenzelm@10003
  2146
should instead use individual commands for printing items
wenzelm@10003
  2147
(print_commands, print_methods etc.);
wenzelm@9224
  2148
wenzelm@10003
  2149
* Isar: added 'nothing' --- the empty list of theorems;
wenzelm@9239
  2150
wenzelm@8184
  2151
paulson@8014
  2152
*** HOL ***
paulson@8014
  2153
wenzelm@10080
  2154
* HOL/MicroJava: formalization of a fragment of Java, together with a
wenzelm@10080
  2155
corresponding virtual machine and a specification of its bytecode
wenzelm@10080
  2156
verifier and a lightweight bytecode verifier, including proofs of
wenzelm@10080
  2157
type-safety; by Gerwin Klein, Tobias Nipkow, David von Oheimb, and
wenzelm@10080
  2158
Cornelia Pusch (see also the homepage of project Bali at
wenzelm@10080
  2159
http://isabelle.in.tum.de/Bali/);
wenzelm@10080
  2160
wenzelm@8518
  2161
* HOL/Algebra: new theory of rings and univariate polynomials, by
wenzelm@8518
  2162
Clemens Ballarin;
paulson@8014
  2163
wenzelm@10157
  2164
* HOL/NumberTheory: fundamental Theorem of Arithmetic, Chinese
wenzelm@10003
  2165
Remainder Theorem, Fermat/Euler Theorem, Wilson's Theorem, by Thomas M
wenzelm@10003
  2166
Rasmussen;
wenzelm@8570
  2167
wenzelm@10157
  2168
* HOL/Lattice: fundamental concepts of lattice theory and order
wenzelm@10157
  2169
structures, including duals, properties of bounds versus algebraic
wenzelm@10157
  2170
laws, lattice operations versus set-theoretic ones, the Knaster-Tarski
wenzelm@10157
  2171
Theorem for complete lattices etc.; may also serve as a demonstration
wenzelm@10157
  2172
for abstract algebraic reasoning using axiomatic type classes, and
wenzelm@10157
  2173
mathematics-style proof in Isabelle/Isar; by Markus Wenzel;
wenzelm@10157
  2174
wenzelm@10003
  2175
* HOL/Prolog: a (bare-bones) implementation of Lambda-Prolog, by David
wenzelm@10003
  2176
von Oheimb;
paulson@9542
  2177
wenzelm@10164
  2178
* HOL/IMPP: extension of IMP with local variables and mutually
wenzelm@10164
  2179
recursive procedures, by David von Oheimb;
wenzelm@10164
  2180
wenzelm@10003
  2181
* HOL/Lambda: converted into new-style theory and document;
paulson@9542
  2182
wenzelm@10003
  2183
* HOL/ex/Multiquote: example of multiple nested quotations and
wenzelm@10003
  2184
anti-quotations -- basically a generalized version of de-Bruijn
wenzelm@10003
  2185
representation; very useful in avoiding lifting of operations;
wenzelm@8848
  2186
wenzelm@9612
  2187
* HOL/record: added general record equality rule to simpset; fixed
wenzelm@9612
  2188
select-update simplification procedure to handle extended records as
wenzelm@9612
  2189
well; admit "r" as field name;
paulson@9542
  2190
paulson@8967
  2191
* HOL: 0 is now overloaded over the new sort "zero", allowing its use with
paulson@8967
  2192
other numeric types and also as the identity of groups, rings, etc.;
paulson@8967
  2193
paulson@8967
  2194
* HOL: new axclass plus_ac0 for addition with the AC-laws and 0 as identity.
paulson@8967
  2195
Types nat and int belong to this axclass;
paulson@8967
  2196
wenzelm@10003
  2197
* HOL: greatly improved simplification involving numerals of type nat, int, real:
paulson@8788
  2198
   (i + #8 + j) = Suc k simplifies to  #7 + (i + j) = k
paulson@8832
  2199
   i*j + k + j*#3*i     simplifies to  #4*(i*j) + k
paulson@8832
  2200
  two terms #m*u and #n*u are replaced by #(m+n)*u
paulson@8832
  2201
    (where #m, #n and u can implicitly be 1; this is simproc combine_numerals)
paulson@8832
  2202
  and the term/formula #m*u+x ~~ #n*u+y simplifies simplifies to #(m-n)+x ~~ y
paulson@8832
  2203
    or x ~~ #(n-m)+y, where ~~ is one of = < <= or - (simproc cancel_numerals);
paulson@8736
  2204
wenzelm@10003
  2205
* HOL: meson_tac is available (previously in ex/meson.ML); it is a
wenzelm@10003
  2206
powerful prover for predicate logic but knows nothing of clasets; see
wenzelm@10003
  2207
ex/mesontest.ML and ex/mesontest2.ML for example applications;
paulson@9835
  2208
wenzelm@8848
  2209
* HOL: new version of "case_tac" subsumes both boolean case split and
wenzelm@8440
  2210
"exhaust_tac" on datatypes; INCOMPATIBILITY: exhaust_tac no longer
wenzelm@8518
  2211
exists, may define val exhaust_tac = case_tac for ad-hoc portability;
wenzelm@8440
  2212
wenzelm@8848
  2213
* HOL: simplification no longer dives into case-expressions: only the
wenzelm@10129
  2214
selector expression is simplified, but not the remaining arms; to
wenzelm@10129
  2215
enable full simplification of case-expressions for datatype t, you may
wenzelm@10129
  2216
remove t.weak_case_cong from the simpset, either globally (Delcongs
wenzelm@10129
  2217
[thm"t.weak_case_cong"];) or locally (delcongs [...]).
nipkow@8603
  2218
wenzelm@8848
  2219
* HOL/recdef: the recursion equations generated by 'recdef' for
wenzelm@8848
  2220
function 'f' are now called f.simps instead of f.rules; if all
wenzelm@8848
  2221
termination conditions are proved automatically, these simplification
wenzelm@8848
  2222
rules are added to the simpset, as in primrec; rules may be named
wenzelm@8848
  2223
individually as well, resulting in a separate list of theorems for
wenzelm@8848
  2224
each equation;
wenzelm@8848
  2225
wenzelm@9489
  2226
* HOL/While is a new theory that provides a while-combinator. It
wenzelm@9489
  2227
permits the definition of tail-recursive functions without the
wenzelm@9489
  2228
provision of a termination measure. The latter is necessary once the
wenzelm@9489
  2229
invariant proof rule for while is applied.
nipkow@9457
  2230
wenzelm@10003
  2231
* HOL: new (overloaded) notation for the set of elements below/above
wenzelm@10003
  2232
some element: {..u}, {..u(}, {l..}, {)l..}. See theory SetInterval.
nipkow@8925
  2233
wenzelm@8848
  2234
* HOL: theorems impI, allI, ballI bound as "strip";
wenzelm@8848
  2235
wenzelm@10003
  2236
* HOL: new tactic induct_thm_tac: thm -> string -> int -> tactic
nipkow@9746
  2237
induct_tac th "x1 ... xn" expects th to have a conclusion of the form
nipkow@9746
  2238
P v1 ... vn and abbreviates res_inst_tac [("v1","x1"),...,("vn","xn")] th;
nipkow@9746
  2239
wenzelm@10003
  2240
* HOL/Real: "rabs" replaced by overloaded "abs" function;
nipkow@9737
  2241
wenzelm@10003
  2242
* HOL: theory Sexp now in HOL/Induct examples (it used to be part of
wenzelm@10003
  2243
main HOL, but was unused);
nipkow@8626
  2244
wenzelm@10003
  2245
* HOL: fewer consts declared as global (e.g. have to refer to
wenzelm@10003
  2246
"Lfp.lfp" instead of "lfp" internally; affects ML packages only);
wenzelm@8887
  2247
wenzelm@10003
  2248
* HOL: tuned AST representation of nested pairs, avoiding bogus output
wenzelm@10003
  2249
in case of overlap with user translations (e.g. judgements over
wenzelm@10003
  2250
tuples); (note that the underlying logical represenation is still
wenzelm@10003
  2251
bogus);
wenzelm@9349
  2252
nipkow@8412
  2253
paulson@9542
  2254
*** ZF ***
paulson@9542
  2255
wenzelm@10003
  2256
* ZF: simplification automatically cancels common terms in arithmetic
wenzelm@10003
  2257
expressions over nat and int;
paulson@9542
  2258
wenzelm@10003
  2259
* ZF: new treatment of nat to minimize type-checking: all operators
wenzelm@10003
  2260
coerce their operands to a natural number using the function natify,
wenzelm@10003
  2261
making the algebraic laws unconditional;
paulson@9542
  2262
wenzelm@10003
  2263
* ZF: as above, for int: operators coerce their operands to an integer
wenzelm@10003
  2264
using the function intify;
paulson@9542
  2265
wenzelm@10003
  2266
* ZF: the integer library now contains many of the usual laws for the
wenzelm@10003
  2267
orderings, including $<=, and monotonicity laws for $+ and $*;
paulson@9542
  2268
wenzelm@10003
  2269
* ZF: new example ZF/ex/NatSum to demonstrate integer arithmetic
wenzelm@10003
  2270
simplification;
paulson@9388
  2271
wenzelm@10003
  2272
* FOL and ZF: AddIffs now available, giving theorems of the form P<->Q
wenzelm@10003
  2273
to the simplifier and classical reasoner simultaneously;
paulson@9388
  2274
paulson@9388
  2275
wenzelm@8358
  2276
*** General ***
wenzelm@8358
  2277
wenzelm@10003
  2278
* Provers: blast_tac now handles actual object-logic rules as
wenzelm@10003
  2279
assumptions; note that auto_tac uses blast_tac internally as well;
wenzelm@10003
  2280
wenzelm@10003
  2281
* Provers: new functions rulify/rulify_no_asm: thm -> thm for turning
wenzelm@10003
  2282
outer -->/All/Ball into ==>/!!; qed_spec_mp now uses rulify_no_asm;
wenzelm@10003
  2283
wenzelm@9941
  2284
* Provers: delrules now handles destruct rules as well (no longer need
wenzelm@9941
  2285
explicit make_elim);
wenzelm@9941
  2286
wenzelm@10003
  2287
* Provers: Blast_tac now warns of and ignores "weak elimination rules" e.g.
wenzelm@10003
  2288
  [| inj ?f;          ?f ?x = ?f ?y; ?x = ?y ==> ?W |] ==> ?W
wenzelm@10003
  2289
use instead the strong form,
wenzelm@10003
  2290
  [| inj ?f; ~ ?W ==> ?f ?x = ?f ?y; ?x = ?y ==> ?W |] ==> ?W
wenzelm@10003
  2291
in HOL, FOL and ZF the function cla_make_elim will create such rules
wenzelm@10003
  2292
from destruct-rules;
wenzelm@9489
  2293
wenzelm@9709
  2294
* Provers: Simplifier.easy_setup provides a fast path to basic
wenzelm@9709
  2295
Simplifier setup for new object-logics;
wenzelm@9709
  2296
wenzelm@9709
  2297
* Pure: AST translation rules no longer require constant head on LHS;
wenzelm@9349
  2298
wenzelm@9709
  2299
* Pure: improved name spaces: ambiguous output is qualified; support
wenzelm@9709
  2300
for hiding of names;
wenzelm@8729
  2301
wenzelm@10003
  2302
* system: smart setup of canonical ML_HOME, ISABELLE_INTERFACE, and
wenzelm@10003
  2303
XSYMBOL_HOME; no longer need to do manual configuration in most
wenzelm@10003
  2304
situations;
wenzelm@10003
  2305
wenzelm@9709
  2306
* system: compression of ML heaps images may now be controlled via -c
wenzelm@9709
  2307
option of isabelle and isatool usedir (currently only observed by
wenzelm@9709
  2308
Poly/ML);
wenzelm@8358
  2309
wenzelm@9981
  2310
* system: isatool installfonts may handle X-Symbol fonts as well (very
wenzelm@9981
  2311
useful for remote X11);
wenzelm@9981
  2312
wenzelm@9709
  2313
* system: provide TAGS file for Isabelle sources;
wenzelm@9052
  2314
wenzelm@9288
  2315
* ML: infix 'OF' is a version of 'MRS' with more appropriate argument
wenzelm@9288
  2316
order;
wenzelm@9288
  2317
wenzelm@8994
  2318
* ML: renamed flags Syntax.trace_norm_ast to Syntax.trace_ast; global
wenzelm@8994
  2319
timing flag supersedes proof_timing and Toplevel.trace;
wenzelm@8994
  2320
wenzelm@10003
  2321
* ML: new combinators |>> and |>>> for incremental transformations
wenzelm@10003
  2322
with secondary results (e.g. certain theory extensions):
wenzelm@10003
  2323
wenzelm@9330
  2324
* ML: PureThy.add_defs gets additional argument to indicate potential
wenzelm@9330
  2325
overloading (usually false);
wenzelm@9330
  2326
wenzelm@10003
  2327
* ML: PureThy.add_thms/add_axioms/add_defs now return theorems as
wenzelm@10003
  2328
results;
wenzelm@8440
  2329
wenzelm@8358
  2330
wenzelm@8015
  2331
wenzelm@7986
  2332
New in Isabelle99 (October 1999)
wenzelm@7986
  2333
--------------------------------
oheimb@4649
  2334
paulson@5931
  2335
*** Overview of INCOMPATIBILITIES (see below for more details) ***
paulson@5931
  2336
paulson@6922
  2337
* HOL: The THEN and ELSE parts of conditional expressions (if P then x else y)
paulson@6922
  2338
are no longer simplified.  (This allows the simplifier to unfold recursive
paulson@6922
  2339
functional programs.)  To restore the old behaviour, declare
wenzelm@7215
  2340
wenzelm@7215
  2341
    Delcongs [if_weak_cong];
paulson@6922
  2342
wenzelm@6269
  2343
* HOL: Removed the obsolete syntax "Compl A"; use -A for set
wenzelm@6269
  2344
complement;
paulson@5931
  2345
wenzelm@6269
  2346
* HOL: the predicate "inj" is now defined by translation to "inj_on";
paulson@6174
  2347
berghofe@7847
  2348
* HOL/datatype: mutual_induct_tac no longer exists --
berghofe@7847
  2349
  use induct_tac "x_1 ... x_n" instead of mutual_induct_tac ["x_1", ..., "x_n"]
berghofe@7847
  2350
wenzelm@6386
  2351
* HOL/typedef: fixed type inference for representing set; type
wenzelm@6386
  2352
arguments now have to occur explicitly on the rhs as type constraints;
wenzelm@6386
  2353
wenzelm@6269
  2354
* ZF: The con_defs part of an inductive definition may no longer refer
wenzelm@6269
  2355
to constants declared in the same theory;
nipkow@6057
  2356
wenzelm@6269
  2357
* HOL, ZF: the function mk_cases, generated by the inductive
wenzelm@6269
  2358
definition package, has lost an argument.  To simplify its result, it
wenzelm@6269
  2359
uses the default simpset instead of a supplied list of theorems.
paulson@6141
  2360
wenzelm@7215
  2361
* HOL/List: the constructors of type list are now Nil and Cons;
wenzelm@7215
  2362
nipkow@7619
  2363
* Simplifier: the type of the infix ML functions
wenzelm@8729
  2364
        setSSolver addSSolver setSolver addSolver
nipkow@7619
  2365
is now  simpset * solver -> simpset  where `solver' is a new abstract type
nipkow@7619
  2366
for packaging solvers. A solver is created via
wenzelm@8729
  2367
        mk_solver: string -> (thm list -> int -> tactic) -> solver
nipkow@7619
  2368
where the string argument is only a comment.
nipkow@6057
  2369
wenzelm@7647
  2370
paulson@6069
  2371
*** Proof tools ***
paulson@6069
  2372
wenzelm@6343
  2373
* Provers/Arith/fast_lin_arith.ML contains a functor for creating a
wenzelm@6343
  2374
decision procedure for linear arithmetic. Currently it is used for
wenzelm@7593
  2375
types `nat', `int', and `real' in HOL (see below); it can, should and
wenzelm@7593
  2376
will be instantiated for other types and logics as well.
paulson@6069
  2377
nipkow@7324
  2378
* The simplifier now accepts rewrite rules with flexible heads, eg
nipkow@7324
  2379
     hom ?f ==> ?f(?x+?y) = ?f ?x + ?f ?y
nipkow@7324
  2380
  They are applied like any rule with a non-pattern lhs, i.e. by first-order
nipkow@7324
  2381
  matching.
paulson@6069
  2382
wenzelm@7593
  2383
paulson@6014
  2384
*** General ***
paulson@6014
  2385
wenzelm@7986
  2386
* New Isabelle/Isar subsystem provides an alternative to traditional
wenzelm@7215
  2387
tactical theorem proving; together with the ProofGeneral/isar user
wenzelm@7215
  2388
interface it offers an interactive environment for developing human
wenzelm@7215
  2389
readable proof documents (Isar == Intelligible semi-automated
wenzelm@7886
  2390
reasoning); for further information see isatool doc isar-ref,
wenzelm@7986
  2391
src/HOL/Isar_examples and http://isabelle.in.tum.de/Isar/
wenzelm@7886
  2392
wenzelm@9612
  2393
* improved and simplified presentation of theories: better HTML markup
wenzelm@9612
  2394
(including colors), graph views in several sizes; isatool usedir now
wenzelm@9612
  2395
provides a proper interface for user theories (via -P option); actual
wenzelm@9612
  2396
document preparation based on (PDF)LaTeX is available as well (for
wenzelm@9612
  2397
new-style theories only); see isatool doc system for more information;
wenzelm@7215
  2398
wenzelm@7252
  2399
* native support for Proof General, both for classic Isabelle and
wenzelm@7986
  2400
Isabelle/Isar;
wenzelm@7215
  2401
wenzelm@7791
  2402
* ML function thm_deps visualizes dependencies of theorems and lemmas,
wenzelm@7791
  2403
using the graph browser tool;
wenzelm@7791
  2404
wenzelm@6751
  2405
* Isabelle manuals now also available as PDF;
wenzelm@6751
  2406
wenzelm@6449
  2407
* theory loader rewritten from scratch (may not be fully
wenzelm@6449
  2408
bug-compatible); old loadpath variable has been replaced by show_path,
wenzelm@6671
  2409
add_path, del_path, reset_path functions; new operations such as
wenzelm@7593
  2410
update_thy, touch_thy, remove_thy, use/update_thy_only (see also
wenzelm@7593
  2411
isatool doc ref);
wenzelm@6449
  2412
wenzelm@7215
  2413
* improved isatool install: option -k creates KDE application icon,
wenzelm@7215
  2414
option -p DIR installs standalone binaries;
wenzelm@7215
  2415
wenzelm@7215
  2416
* added ML_PLATFORM setting (useful for cross-platform installations);
wenzelm@7215
  2417
more robust handling of platform specific ML images for SML/NJ;
wenzelm@7215
  2418
wenzelm@7886
  2419
* the settings environment is now statically scoped, i.e. it is never
wenzelm@7986
  2420
created again in sub-processes invoked from isabelle, isatool, or
wenzelm@7886
  2421
Isabelle;
wenzelm@7886
  2422
wenzelm@7215
  2423
* path element specification '~~' refers to '$ISABELLE_HOME';
wenzelm@7215
  2424
wenzelm@6343
  2425
* in locales, the "assumes" and "defines" parts may be omitted if
wenzelm@6343
  2426
empty;
wenzelm@5973
  2427
wenzelm@6269
  2428
* new print_mode "xsymbols" for extended symbol support (e.g. genuine
wenzelm@6269
  2429
long arrows);
wenzelm@6259
  2430
wenzelm@6343
  2431
* new print_mode "HTML";
wenzelm@6343
  2432
wenzelm@6343
  2433
* new flag show_tags controls display of tags of theorems (which are
wenzelm@6343
  2434
basically just comments that may be attached by some tools);
wenzelm@6343
  2435
wenzelm@6461
  2436
* Isamode 2.6 requires patch to accomodate change of Isabelle font
wenzelm@6461
  2437
mode and goal output format:
wenzelm@6461
  2438
wenzelm@6461
  2439
diff -r Isamode-2.6/elisp/isa-load.el Isamode/elisp/isa-load.el
wenzelm@6461
  2440
244c244
wenzelm@6461
  2441
<       (list (isa-getenv "ISABELLE") "-msymbols" logic-name)
wenzelm@6461
  2442
---
wenzelm@6533
  2443
>       (list (isa-getenv "ISABELLE") "-misabelle_font" "-msymbols" logic-name)
wenzelm@6461
  2444
diff -r Isabelle-2.6/elisp/isa-proofstate.el Isamode/elisp/isa-proofstate.el
wenzelm@6461
  2445
181c181
wenzelm@6461
  2446
< (defconst proofstate-proofstart-regexp "^Level [0-9]+$"
wenzelm@6461
  2447
---
wenzelm@6461
  2448
> (defconst proofstate-proofstart-regexp "^Level [0-9]+"
wenzelm@6461
  2449
wenzelm@7450
  2450
* function bind_thms stores lists of theorems (cf. bind_thm);
wenzelm@7450
  2451
wenzelm@7593
  2452
* new shorthand tactics ftac, eatac, datac, fatac;
wenzelm@7593
  2453
wenzelm@7593
  2454
* qed (and friends) now accept "" as result name; in that case the
wenzelm@7986
  2455
theorem is not stored, but proper checks and presentation of the
wenzelm@7986
  2456
result still apply;
wenzelm@7593
  2457
wenzelm@7805
  2458
* theorem database now also indexes constants "Trueprop", "all",
wenzelm@7805
  2459
"==>", "=="; thus thms_containing, findI etc. may retrieve more rules;
wenzelm@7805
  2460
oheimb@6028
  2461
nipkow@6057
  2462
*** HOL ***
nipkow@6057
  2463
wenzelm@7215
  2464
** HOL arithmetic **
wenzelm@7215
  2465
wenzelm@6343
  2466
* There are now decision procedures for linear arithmetic over nat and
wenzelm@6343
  2467
int:
nipkow@6131
  2468
wenzelm@6343
  2469
1. arith_tac copes with arbitrary formulae involving `=', `<', `<=',
wenzelm@6343
  2470
`+', `-', `Suc', `min', `max' and numerical constants; other subterms
wenzelm@6343
  2471
are treated as atomic; subformulae not involving type `nat' or `int'
wenzelm@6343
  2472
are ignored; quantified subformulae are ignored unless they are
wenzelm@6343
  2473
positive universal or negative existential. The tactic has to be
wenzelm@6343
  2474
invoked by hand and can be a little bit slow. In particular, the
wenzelm@6343
  2475
running time is exponential in the number of occurrences of `min' and
wenzelm@6343
  2476
`max', and `-' on `nat'.
nipkow@6131
  2477
wenzelm@6343
  2478
2. fast_arith_tac is a cut-down version of arith_tac: it only takes
wenzelm@6343
  2479
(negated) (in)equalities among the premises and the conclusion into
wenzelm@6343
  2480
account (i.e. no compound formulae) and does not know about `min' and
wenzelm@6343
  2481
`max', and `-' on `nat'. It is fast and is used automatically by the
wenzelm@6343
  2482
simplifier.
nipkow@6131
  2483
wenzelm@6343
  2484
NB: At the moment, these decision procedures do not cope with mixed
wenzelm@6343
  2485
nat/int formulae where the two parts interact, such as `m < n ==>
wenzelm@6343
  2486
int(m) < int(n)'.
oheimb@6028
  2487
wenzelm@7215
  2488
* HOL/Numeral provides a generic theory of numerals (encoded
wenzelm@7313
  2489
efficiently as bit strings); setup for types nat/int/real is in place;
wenzelm@7215
  2490
INCOMPATIBILITY: since numeral syntax is now polymorphic, rather than
wenzelm@7215
  2491
int, existing theories and proof scripts may require a few additional
wenzelm@7215
  2492
type constraints;
wenzelm@7215
  2493
wenzelm@7215
  2494
* integer division and remainder can now be performed on constant
wenzelm@7215
  2495
arguments;
paulson@7157
  2496
wenzelm@7215
  2497
* many properties of integer multiplication, division and remainder
wenzelm@7215
  2498
are now available;
paulson@6922
  2499
paulson@7287
  2500
* An interface to the Stanford Validity Checker (SVC) is available through the
paulson@7287
  2501
tactic svc_tac.  Propositional tautologies and theorems of linear arithmetic
paulson@7287
  2502
are proved automatically.  SVC must be installed separately, and its results
paulson@7287
  2503
must be TAKEN ON TRUST (Isabelle does not check the proofs, but tags any
paulson@7287
  2504
invocation of the underlying oracle).  For SVC see
paulson@7444
  2505
  http://verify.stanford.edu/SVC
paulson@6922
  2506
wenzelm@7125
  2507
* IsaMakefile: the HOL-Real target now builds an actual image;
wenzelm@7125
  2508
wenzelm@7215
  2509
wenzelm@7215
  2510
** HOL misc **
wenzelm@7215
  2511
wenzelm@7595
  2512
* HOL/Real/HahnBanach: the Hahn-Banach theorem for real vector spaces
wenzelm@7595
  2513
(in Isabelle/Isar) -- by Gertrud Bauer;
wenzelm@7595
  2514
wenzelm@7691
  2515
* HOL/BCV: generic model of bytecode verification, i.e. data-flow
wenzelm@7691
  2516
analysis for assembly languages with subtypes;
wenzelm@7691
  2517
wenzelm@6278
  2518
* HOL/TLA (Lamport's Temporal Logic of Actions): major reorganization
wenzelm@6278
  2519
-- avoids syntactic ambiguities and treats state, transition, and
wenzelm@6278
  2520
temporal levels more uniformly; introduces INCOMPATIBILITIES due to
wenzelm@6278
  2521
changed syntax and (many) tactics;
wenzelm@6278
  2522
wenzelm@7791
  2523
* HOL/inductive: Now also handles more general introduction rules such
wenzelm@7791
  2524
  as "ALL y. (y, x) : r --> y : acc r ==> x : acc r"; monotonicity
wenzelm@7791
  2525
  theorems are now maintained within the theory (maintained via the
wenzelm@7791
  2526
  "mono" attribute);
berghofe@7780
  2527
wenzelm@7238
  2528
* HOL/datatype: Now also handles arbitrarily branching datatypes
wenzelm@7238
  2529
  (using function types) such as
wenzelm@7238
  2530
wenzelm@7238
  2531
  datatype 'a tree = Atom 'a | Branch "nat => 'a tree"
berghofe@7047
  2532
wenzelm@7326
  2533
* HOL/record: record_simproc (part of the default simpset) takes care
wenzelm@7326
  2534
of selectors applied to updated records; record_split_tac is no longer
wenzelm@7327
  2535
part of the default claset; update_defs may now be removed from the
wenzelm@7327
  2536
simpset in many cases; COMPATIBILITY: old behavior achieved by
wenzelm@7326
  2537
wenzelm@7326
  2538
  claset_ref () := claset() addSWrapper record_split_wrapper;
wenzelm@7326
  2539
  Delsimprocs [record_simproc]
wenzelm@7326
  2540
wenzelm@6386
  2541
* HOL/typedef: fixed type inference for representing set; type
wenzelm@6386
  2542
arguments now have to occur explicitly on the rhs as type constraints;
wenzelm@6386
  2543
paulson@7287
  2544
* HOL/recdef (TFL): 'congs' syntax now expects comma separated list of theorem
paulson@7287
  2545
names rather than an ML expression;
paulson@7287
  2546
paulson@7287
  2547
* HOL/defer_recdef (TFL): like recdef but the well-founded relation can be
paulson@7287
  2548
supplied later.  Program schemes can be defined, such as
paulson@7287
  2549
    "While B C s = (if B s then While B C (C s) else s)"
paulson@7287
  2550
where the well-founded relation can be chosen after B and C have been given.
wenzelm@6563
  2551