NEWS
author wenzelm
Mon Nov 03 21:56:59 1997 +0100 (1997-11-03)
changeset 4108 1610602a2964
parent 4070 3a6e1e562aed
child 4112 98c8f40f7bbe
permissions -rw-r--r--
isatool fixclasimp;
wenzelm@3943
     1
wenzelm@2553
     2
Isabelle NEWS -- history of user-visible changes
wenzelm@2553
     3
================================================
wenzelm@2553
     4
wenzelm@3454
     5
New in Isabelle???? (DATE ????)
wenzelm@3454
     6
-------------------------------
wenzelm@3454
     7
paulson@3715
     8
*** General Changes ***
paulson@3715
     9
wenzelm@3901
    10
* hierachically structured name spaces (for consts, types, axms,
wenzelm@3943
    11
etc.); new lexical class 'longid' (e.g. Foo.bar.x) may render much of
wenzelm@4108
    12
old input syntactically incorrect (e.g. "%x.x"); COMPATIBILITY:
wenzelm@4108
    13
isatool fixdots ensures space after dots (e.g. "%x. x"); set
wenzelm@4108
    14
long_names for fully qualified output names; NOTE: in case of severe
wenzelm@4108
    15
problems with backward campatibility try setting 'global_names' at
wenzelm@4108
    16
compile time to disable qualified names for theories; may also fine
wenzelm@4108
    17
tune theories via 'global' and 'local' section;
wenzelm@4108
    18
wenzelm@4108
    19
* reimplemented the implicit simpset and claset using the new anytype
wenzelm@4108
    20
data filed in signatures; references simpset:simpset ref etc. are
wenzelm@4108
    21
replaced by functions simpset:unit->simpset and
wenzelm@4108
    22
simpset_ref:unit->simpset ref; COMPATIBILITY: use isatool fixclasimp
wenzelm@4108
    23
to patch your ML files accordingly;
paulson@3856
    24
wenzelm@3857
    25
* HTML output now includes theory graph data for display with Java
wenzelm@3857
    26
applet or isatool browser; data generated automatically via isatool
wenzelm@3901
    27
usedir (see -i option, ISABELLE_USEDIR_OPTIONS);
wenzelm@3857
    28
paulson@3856
    29
* defs may now be conditional; improved rewrite_goals_tac to handle
paulson@3856
    30
conditional equations;
paulson@3856
    31
wenzelm@3901
    32
* theory aliases via merge (e.g. M=A+B+C) no longer supported, always
wenzelm@3901
    33
creates a new theory node; implicit merge of thms' signatures is
wenzelm@3901
    34
restricted to 'trivial' ones, thus one may have to use
wenzelm@3901
    35
transfer:theory->thm->thm in (rare) cases;
wenzelm@3901
    36
wenzelm@3968
    37
* improved handling of draft signatures / theories; draft thms (and
wenzelm@3968
    38
ctyps, cterms) are automatically promoted to real ones;
wenzelm@3968
    39
wenzelm@3901
    40
* slightly changed interfaces for oracles: admit many per theory, named
wenzelm@3901
    41
(e.g. oracle foo = mlfun), additional name argument for invoke_oracle;
wenzelm@3901
    42
wenzelm@3901
    43
* print_goals: optional output of const types (set show_consts and
wenzelm@3901
    44
show_types);
wenzelm@3851
    45
wenzelm@3744
    46
* improved output of warnings (###) / errors (***);
wenzelm@3697
    47
paulson@3715
    48
* removed old README and Makefiles;
wenzelm@3697
    49
paulson@3856
    50
* replaced print_goals_ref hook by print_current_goals_fn and result_error_fn;
wenzelm@3670
    51
paulson@3715
    52
* removed obsolete init_pps and init_database;
paulson@3715
    53
paulson@3715
    54
* deleted the obsolete tactical STATE, which was declared by
paulson@3715
    55
    fun STATE tacfun st = tacfun st st;
paulson@3715
    56
paulson@3715
    57
paulson@3715
    58
*** Classical Reasoner ***
paulson@3715
    59
wenzelm@3744
    60
* Clarify_tac, clarify_tac, clarify_step_tac, Clarify_step_tac: new
wenzelm@3744
    61
tactics that use classical reasoning to simplify a subgoal without
wenzelm@3744
    62
splitting it into several subgoals;
paulson@3715
    63
paulson@3719
    64
* Safe_tac: like safe_tac but uses the default claset;
paulson@3719
    65
paulson@3715
    66
paulson@3715
    67
*** Simplifier ***
paulson@3715
    68
paulson@3715
    69
* added simplification meta rules:
paulson@3715
    70
    (asm_)(full_)simplify: simpset -> thm -> thm;
paulson@3715
    71
paulson@3715
    72
* simplifier.ML no longer part of Pure -- has to be loaded by object
paulson@3715
    73
logics (again);
paulson@3715
    74
paulson@3715
    75
* added prems argument to simplification procedures;
paulson@3715
    76
paulson@3715
    77
paulson@3715
    78
*** Syntax ***
paulson@3715
    79
wenzelm@3985
    80
* no longer handles consts with name "" -- declare as 'syntax' instead;
paulson@3856
    81
paulson@3856
    82
* pretty printer: changed order of mixfix annotation preference (again!);
wenzelm@3846
    83
paulson@3715
    84
* Pure: fixed idt/idts vs. pttrn/pttrns syntactic categories;
paulson@3715
    85
paulson@3715
    86
paulson@3715
    87
*** HOL ***
paulson@3715
    88
nipkow@4035
    89
* HOL/TLA: Stephan Merz's formalization of Lamport's Temporal Logic of Actions;
wenzelm@3985
    90
wenzelm@3985
    91
* HOL/Auth: new protocol proofs including some for the Internet
nipkow@4035
    92
  protocol TLS;
wenzelm@3985
    93
nipkow@3982
    94
* HOL/Map: new theory of `maps' a la VDM.
nipkow@3982
    95
nipkow@3930
    96
* HOL/simplifier: added infix function `addsplits':
nipkow@3930
    97
  instead of `<simpset> setloop (split_tac <thms>)'
nipkow@3964
    98
  you can simply write `<simpset> addsplits <thms>'
nipkow@3930
    99
nipkow@3580
   100
* HOL/simplifier: terms of the form
nipkow@3580
   101
  `? x. P1(x) & ... & Pn(x) & x=t & Q1(x) & ... Qn(x)' (or t=x)
nipkow@3580
   102
  are rewritten to
nipkow@4035
   103
  `P1(t) & ... & Pn(t) & Q1(t) & ... Qn(t)',
nipkow@4035
   104
  and those of the form
nipkow@4035
   105
  `! x. P1(x) & ... & Pn(x) & x=t & Q1(x) & ... Qn(x) --> R(x)' (or t=x)
nipkow@4035
   106
  are rewritten to
nipkow@4035
   107
  `P1(t) & ... & Pn(t) & Q1(t) & ... Qn(t) --> R(t)',
nipkow@4035
   108
nipkow@4035
   109
* HOL/datatype
nipkow@4035
   110
  Each datatype `t' now comes with a theorem `split_t_case' of the form
nipkow@3580
   111
nipkow@4035
   112
  P(t_case f1 ... fn x) =
nipkow@4035
   113
     ( (!y1 ... ym1. x = C1 y1 ... ym1 --> P(f1 y1 ... ym1)) &
nipkow@4035
   114
        ...
nipkow@4035
   115
        (!y1 ... ymn. x = Cn y1 ... ymn --> P(f1 y1 ... ymn))
nipkow@4035
   116
     )
nipkow@4035
   117
nipkow@4070
   118
  which can be added to a simpset via `addsplits'. The existing theorems
nipkow@4070
   119
  expand_list_case and expand_option_case have been renamed to
nipkow@4070
   120
  split_list_case and split_option_case.
nipkow@4035
   121
nipkow@4035
   122
* HOL/Lists: the function "set_of_list" has been renamed "set"
nipkow@4035
   123
  (and its theorems too);
paulson@3570
   124
wenzelm@3454
   125
paulson@3715
   126
*** HOLCF ***
wenzelm@3535
   127
wenzelm@3985
   128
* HOLCF: fixed LAM <x,y,zs>.b syntax;
wenzelm@3567
   129
wenzelm@3744
   130
* added extended adm_tac to simplifier in HOLCF -- can now discharge
wenzelm@3744
   131
adm (%x. P (t x)), where P is chainfinite and t continuous;
wenzelm@3579
   132
wenzelm@3579
   133
paulson@3719
   134
*** FOL and ZF ***
paulson@3719
   135
wenzelm@3744
   136
* qed_spec_mp, qed_goal_spec_mp, qed_goalw_spec_mp are available, as
wenzelm@3744
   137
in HOL, they strip ALL and --> from proved theorems;
wenzelm@3744
   138
paulson@3719
   139
wenzelm@3579
   140
wenzelm@3006
   141
New in Isabelle94-8 (May 1997)
wenzelm@3006
   142
------------------------------
wenzelm@2654
   143
paulson@3002
   144
*** General Changes ***
paulson@3002
   145
paulson@3002
   146
* new utilities to build / run / maintain Isabelle etc. (in parts
paulson@3002
   147
still somewhat experimental); old Makefiles etc. still functional;
wenzelm@2971
   148
wenzelm@3205
   149
* new 'Isabelle System Manual';
wenzelm@3205
   150
wenzelm@2825
   151
* INSTALL text, together with ./configure and ./build scripts;
wenzelm@2773
   152
wenzelm@3006
   153
* reimplemented type inference for greater efficiency, better error
wenzelm@3006
   154
messages and clean internal interface;
paulson@3002
   155
paulson@3002
   156
* prlim command for dealing with lots of subgoals (an easier way of
paulson@3002
   157
setting goals_limit);
paulson@3002
   158
wenzelm@3006
   159
wenzelm@3006
   160
*** Syntax ***
paulson@3002
   161
wenzelm@3116
   162
* supports alternative (named) syntax tables (parser and pretty
wenzelm@3116
   163
printer); internal interface is provided by add_modesyntax(_i);
wenzelm@3116
   164
paulson@3002
   165
* Pure, FOL, ZF, HOL, HOLCF now support symbolic input and output; to
paulson@3002
   166
be used in conjunction with the Isabelle symbol font; uses the
paulson@3002
   167
"symbols" syntax table;
paulson@3002
   168
wenzelm@2705
   169
* added token_translation interface (may translate name tokens in
wenzelm@2756
   170
arbitrary ways, dependent on their type (free, bound, tfree, ...) and
wenzelm@3116
   171
the current print_mode); IMPORTANT: user print translation functions
wenzelm@3116
   172
are responsible for marking newly introduced bounds
wenzelm@3116
   173
(Syntax.mark_boundT);
wenzelm@2705
   174
wenzelm@2730
   175
* token translations for modes "xterm" and "xterm_color" that display
wenzelm@3006
   176
names in bold, underline etc. or colors (which requires a color
wenzelm@3006
   177
version of xterm);
wenzelm@2730
   178
paulson@3002
   179
* infixes may now be declared with names independent of their syntax;
paulson@3002
   180
paulson@3002
   181
* added typed_print_translation (like print_translation, but may
paulson@3002
   182
access type of constant);
paulson@3002
   183
wenzelm@3006
   184
paulson@3002
   185
*** Classical Reasoner ***
paulson@3002
   186
paulson@3002
   187
Blast_tac: a new tactic!  It is often more powerful than fast_tac, but has
paulson@3002
   188
some limitations.  Blast_tac...
paulson@3002
   189
  + ignores addss, addbefore, addafter; this restriction is intrinsic
paulson@3002
   190
  + ignores elimination rules that don't have the correct format
paulson@3002
   191
	(the conclusion MUST be a formula variable)
paulson@3002
   192
  + ignores types, which can make HOL proofs fail
paulson@3002
   193
  + rules must not require higher-order unification, e.g. apply_type in ZF
paulson@3002
   194
    [message "Function Var's argument not a bound variable" relates to this]
paulson@3002
   195
  + its proof strategy is more general but can actually be slower
paulson@3002
   196
wenzelm@3107
   197
* substitution with equality assumptions no longer permutes other
wenzelm@3107
   198
assumptions;
paulson@3002
   199
paulson@3002
   200
* minor changes in semantics of addafter (now called addaltern); renamed
paulson@3002
   201
setwrapper to setWrapper and compwrapper to compWrapper; added safe wrapper
wenzelm@3107
   202
(and access functions for it);
paulson@3002
   203
oheimb@3317
   204
* improved combination of classical reasoner and simplifier: 
oheimb@3317
   205
  + functions for handling clasimpsets
oheimb@3317
   206
  + improvement of addss: now the simplifier is called _after_ the
oheimb@3317
   207
    safe steps.
oheimb@3317
   208
  + safe variant of addss called addSss: uses safe simplifications
oheimb@3317
   209
    _during_ the safe steps. It is more complete as it allows multiple 
oheimb@3317
   210
    instantiations of unknowns (e.g. with slow_tac).
wenzelm@3006
   211
paulson@3002
   212
*** Simplifier ***
paulson@3002
   213
wenzelm@3006
   214
* added interface for simplification procedures (functions that
wenzelm@3006
   215
produce *proven* rewrite rules on the fly, depending on current
wenzelm@3006
   216
redex);
wenzelm@3006
   217
wenzelm@3006
   218
* ordering on terms as parameter (used for ordered rewriting);
wenzelm@3006
   219
wenzelm@3107
   220
* new functions delcongs, deleqcongs, and Delcongs. richer rep_ss;
paulson@3002
   221
paulson@3002
   222
* the solver is now split into a safe and an unsafe part.
paulson@3002
   223
This should be invisible for the normal user, except that the
paulson@3002
   224
functions setsolver and addsolver have been renamed to setSolver and
wenzelm@3107
   225
addSolver; added safe_asm_full_simp_tac;
paulson@3002
   226
paulson@3002
   227
paulson@3002
   228
*** HOL ***
paulson@3002
   229
nipkow@3042
   230
* a generic induction tactic `induct_tac' which works for all datatypes and
wenzelm@3107
   231
also for type `nat';
nipkow@3042
   232
nipkow@3316
   233
* a generic case distinction tactic `exhaust_tac' which works for all
nipkow@3316
   234
datatypes and also for type `nat';
nipkow@3316
   235
nipkow@3316
   236
* each datatype comes with a function `size';
nipkow@3316
   237
paulson@3002
   238
* patterns in case expressions allow tuple patterns as arguments to
wenzelm@3107
   239
constructors, for example `case x of [] => ... | (x,y,z)#ps => ...';
paulson@3002
   240
paulson@3002
   241
* primrec now also works with type nat;
paulson@3002
   242
paulson@3338
   243
* recdef: a new declaration form, allows general recursive functions to be
paulson@3338
   244
defined in theory files.  See HOL/ex/Fib, HOL/ex/Primes, HOL/Subst/Unify.
paulson@3338
   245
paulson@3002
   246
* the constant for negation has been renamed from "not" to "Not" to
wenzelm@3107
   247
harmonize with FOL, ZF, LK, etc.;
paulson@3002
   248
wenzelm@3107
   249
* HOL/ex/LFilter theory of a corecursive "filter" functional for
wenzelm@3107
   250
infinite lists;
paulson@3002
   251
wenzelm@3227
   252
* HOL/Modelcheck demonstrates invocation of model checker oracle;
wenzelm@3227
   253
paulson@3002
   254
* HOL/ex/Ring.thy declares cring_simp, which solves equational
paulson@3002
   255
problems in commutative rings, using axiomatic type classes for + and *;
paulson@3002
   256
paulson@3002
   257
* more examples in HOL/MiniML and HOL/Auth;
paulson@3002
   258
paulson@3002
   259
* more default rewrite rules for quantifiers, union/intersection;
paulson@3002
   260
nipkow@3321
   261
* a new constant `arbitrary == @x.False';
nipkow@3321
   262
wenzelm@3107
   263
* HOLCF/IOA replaces old HOL/IOA;
wenzelm@3107
   264
slotosch@2653
   265
* HOLCF changes: derived all rules and arities 
slotosch@2653
   266
  + axiomatic type classes instead of classes 
slotosch@2653
   267
  + typedef instead of faking type definitions
paulson@2747
   268
  + eliminated the internal constants less_fun, less_cfun, UU_fun, UU_cfun etc.
wenzelm@2730
   269
  + new axclasses cpo, chfin, flat with flat < chfin < pcpo < cpo < po
slotosch@2653
   270
  + eliminated the types void, one, tr
slotosch@2653
   271
  + use unit lift and bool lift (with translations) instead of one and tr
slotosch@2653
   272
  + eliminated blift from Lift3.thy (use Def instead of blift)
wenzelm@3107
   273
  all eliminated rules are derived as theorems --> no visible changes ;
oheimb@2649
   274
wenzelm@3006
   275
paulson@3002
   276
*** ZF ***
wenzelm@2553
   277
paulson@2865
   278
* ZF now has Fast_tac, Simp_tac and Auto_tac.  Union_iff is a now a default
paulson@2865
   279
rewrite rule; this may affect some proofs.  eq_cs is gone but can be put back
paulson@2865
   280
as ZF_cs addSIs [equalityI];
wenzelm@2553
   281
wenzelm@2554
   282
wenzelm@2732
   283
wenzelm@2553
   284
New in Isabelle94-7 (November 96)
wenzelm@2553
   285
---------------------------------
wenzelm@2553
   286
wenzelm@2553
   287
* allowing negative levels (as offsets) in prlev and choplev;
wenzelm@2553
   288
wenzelm@2554
   289
* super-linear speedup for large simplifications;
wenzelm@2554
   290
wenzelm@2554
   291
* FOL, ZF and HOL now use miniscoping: rewriting pushes
wenzelm@2554
   292
quantifications in as far as possible (COULD MAKE EXISTING PROOFS
wenzelm@2554
   293
FAIL); can suppress it using the command Delsimps (ex_simps @
wenzelm@2554
   294
all_simps); De Morgan laws are also now included, by default;
wenzelm@2554
   295
wenzelm@2554
   296
* improved printing of ==>  :  ~:
wenzelm@2554
   297
wenzelm@2554
   298
* new object-logic "Sequents" adds linear logic, while replacing LK
wenzelm@2554
   299
and Modal (thanks to Sara Kalvala);
wenzelm@2554
   300
wenzelm@2554
   301
* HOL/Auth: correctness proofs for authentication protocols;
wenzelm@2554
   302
wenzelm@2554
   303
* HOL: new auto_tac combines rewriting and classical reasoning (many
wenzelm@2554
   304
examples on HOL/Auth);
wenzelm@2554
   305
wenzelm@2554
   306
* HOL: new command AddIffs for declaring theorems of the form P=Q to
wenzelm@2554
   307
the rewriter and classical reasoner simultaneously;
wenzelm@2554
   308
wenzelm@2554
   309
* function uresult no longer returns theorems in "standard" format;
wenzelm@2554
   310
regain previous version by: val uresult = standard o uresult;
wenzelm@2554
   311
wenzelm@2554
   312
wenzelm@2554
   313
wenzelm@2554
   314
New in Isabelle94-6
wenzelm@2554
   315
-------------------
wenzelm@2554
   316
wenzelm@2554
   317
* oracles -- these establish an interface between Isabelle and trusted
wenzelm@2554
   318
external reasoners, which may deliver results as theorems;
wenzelm@2554
   319
wenzelm@2554
   320
* proof objects (in particular record all uses of oracles);
wenzelm@2554
   321
wenzelm@2554
   322
* Simp_tac, Fast_tac, etc. that refer to implicit simpset / claset;
wenzelm@2554
   323
wenzelm@2554
   324
* "constdefs" section in theory files;
wenzelm@2554
   325
wenzelm@2554
   326
* "primrec" section (HOL) no longer requires names;
wenzelm@2554
   327
wenzelm@2554
   328
* internal type "tactic" now simply "thm -> thm Sequence.seq";
wenzelm@2554
   329
wenzelm@2554
   330
wenzelm@2554
   331
wenzelm@2554
   332
New in Isabelle94-5
wenzelm@2554
   333
-------------------
wenzelm@2554
   334
wenzelm@2554
   335
* reduced space requirements;
wenzelm@2554
   336
wenzelm@2554
   337
* automatic HTML generation from theories;
wenzelm@2554
   338
wenzelm@2554
   339
* theory files no longer require "..." (quotes) around most types;
wenzelm@2554
   340
wenzelm@2554
   341
* new examples, including two proofs of the Church-Rosser theorem;
wenzelm@2554
   342
wenzelm@2554
   343
* non-curried (1994) version of HOL is no longer distributed;
wenzelm@2554
   344
wenzelm@2553
   345
paulson@2557
   346
paulson@2557
   347
New in Isabelle94-4
paulson@2557
   348
-------------------
paulson@2557
   349
paulson@2747
   350
* greatly reduced space requirements;
paulson@2557
   351
paulson@2557
   352
* theory files (.thy) no longer require \...\ escapes at line breaks;
paulson@2557
   353
paulson@2557
   354
* searchable theorem database (see the section "Retrieving theorems" on 
paulson@2557
   355
page 8 of the Reference Manual);
paulson@2557
   356
paulson@2557
   357
* new examples, including Grabczewski's monumental case study of the
paulson@2557
   358
Axiom of Choice;
paulson@2557
   359
paulson@2557
   360
* The previous version of HOL renamed to Old_HOL;
paulson@2557
   361
paulson@2557
   362
* The new version of HOL (previously called CHOL) uses a curried syntax 
paulson@2557
   363
for functions.  Application looks like f a b instead of f(a,b);
paulson@2557
   364
paulson@2557
   365
* Mutually recursive inductive definitions finally work in HOL;
paulson@2557
   366
paulson@2557
   367
* In ZF, pattern-matching on tuples is now available in all abstractions and
paulson@2557
   368
translates to the operator "split";
paulson@2557
   369
paulson@2557
   370
paulson@2557
   371
paulson@2557
   372
New in Isabelle94-3
paulson@2557
   373
-------------------
paulson@2557
   374
paulson@2557
   375
* new infix operator, addss, allowing the classical reasoner to 
paulson@2557
   376
perform simplification at each step of its search.  Example:
paulson@2557
   377
	fast_tac (cs addss ss)
paulson@2557
   378
paulson@2557
   379
* a new logic, CHOL, the same as HOL, but with a curried syntax 
paulson@2557
   380
for functions.  Application looks like f a b instead of f(a,b).  Also pairs 
paulson@2557
   381
look like (a,b) instead of <a,b>;
paulson@2557
   382
paulson@2557
   383
* PLEASE NOTE: CHOL will eventually replace HOL!
paulson@2557
   384
paulson@2557
   385
* In CHOL, pattern-matching on tuples is now available in all abstractions.
paulson@2557
   386
It translates to the operator "split".  A new theory of integers is available;
paulson@2557
   387
paulson@2557
   388
* In ZF, integer numerals now denote two's-complement binary integers.
paulson@2557
   389
Arithmetic operations can be performed by rewriting.  See ZF/ex/Bin.ML;
paulson@2557
   390
paulson@2557
   391
* Many new examples: I/O automata, Church-Rosser theorem, equivalents 
paulson@2557
   392
of the Axiom of Choice;
paulson@2557
   393
paulson@2557
   394
paulson@2557
   395
paulson@2557
   396
New in Isabelle94-2
paulson@2557
   397
-------------------
paulson@2557
   398
paulson@2557
   399
* Significantly faster resolution;  
paulson@2557
   400
paulson@2557
   401
* the different sections in a .thy file can now be mixed and repeated
paulson@2557
   402
freely;
paulson@2557
   403
paulson@2557
   404
* Database of theorems for FOL, HOL and ZF.  New
paulson@2557
   405
commands including qed, qed_goal and bind_thm store theorems in the database.
paulson@2557
   406
paulson@2557
   407
* Simple database queries: return a named theorem (get_thm) or all theorems of
paulson@2557
   408
a given theory (thms_of), or find out what theory a theorem was proved in
paulson@2557
   409
(theory_of_thm);
paulson@2557
   410
paulson@2557
   411
* Bugs fixed in the inductive definition and datatype packages;
paulson@2557
   412
paulson@2557
   413
* The classical reasoner provides deepen_tac and depth_tac, making FOL_dup_cs
paulson@2557
   414
and HOL_dup_cs obsolete;
paulson@2557
   415
paulson@2557
   416
* Syntactic ambiguities caused by the new treatment of syntax in Isabelle94-1
paulson@2557
   417
have been removed;
paulson@2557
   418
paulson@2557
   419
* Simpler definition of function space in ZF;
paulson@2557
   420
paulson@2557
   421
* new results about cardinal and ordinal arithmetic in ZF;
paulson@2557
   422
paulson@2557
   423
* 'subtype' facility in HOL for introducing new types as subsets of existing
paulson@2557
   424
types;
paulson@2557
   425
paulson@2557
   426
wenzelm@2553
   427
$Id$