NEWS
author nipkow
Fri, 01 May 1998 11:43:38 +0200
changeset 4880 312115d20c45
parent 4879 58656c6a3551
child 4899 447d6b2956ba
permissions -rw-r--r--
*** empty log message ***
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
4842
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
     1
2553
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
     2
Isabelle NEWS -- history of user-visible changes
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
     3
================================================
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
     4
4655
481628ea8edd *** empty log message ***
wenzelm
parents: 4649
diff changeset
     5
New in Isabelle??? (FIXME)
481628ea8edd *** empty log message ***
wenzelm
parents: 4649
diff changeset
     6
--------------------------
4649
89ad3eb863a1 changed wrapper mechanism of classical reasoner
oheimb
parents: 4575
diff changeset
     7
4842
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
     8
*** General Changes ***
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
     9
4880
312115d20c45 *** empty log message ***
nipkow
parents: 4879
diff changeset
    10
* Simplifier:
312115d20c45 *** empty log message ***
nipkow
parents: 4879
diff changeset
    11
312115d20c45 *** empty log message ***
nipkow
parents: 4879
diff changeset
    12
 -Asm_full_simp_tac is now more aggressive:
312115d20c45 *** empty log message ***
nipkow
parents: 4879
diff changeset
    13
  1. It will sometimes reorient premises if that increases their power to
312115d20c45 *** empty log message ***
nipkow
parents: 4879
diff changeset
    14
     simplify.
312115d20c45 *** empty log message ***
nipkow
parents: 4879
diff changeset
    15
  2. It does no longer proceed strictly from left to right but may also
312115d20c45 *** empty log message ***
nipkow
parents: 4879
diff changeset
    16
     rotate premises to achieve further simplification.
312115d20c45 *** empty log message ***
nipkow
parents: 4879
diff changeset
    17
  For compatibility reasons there is now Asm_lr_simp_tac which is like the
312115d20c45 *** empty log message ***
nipkow
parents: 4879
diff changeset
    18
  old Asm_full_simp_tac in that it does not rotate premises.
312115d20c45 *** empty log message ***
nipkow
parents: 4879
diff changeset
    19
4842
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
    20
* Changed wrapper mechanism for the classical reasoner now allows for
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
    21
selected deletion of wrappers, by introduction of names for wrapper
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
    22
functionals.  This implies that addbefore, addSbefore, addaltern, and
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
    23
addSaltern now take a pair (name, tactic) as argument, and that adding
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
    24
two tactics with the same name overwrites the first one (emitting a
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
    25
warning).
4824
df8fc4626a9e *** empty log message ***
oheimb
parents: 4806
diff changeset
    26
  type wrapper = (int -> tactic) -> (int -> tactic)
4649
89ad3eb863a1 changed wrapper mechanism of classical reasoner
oheimb
parents: 4575
diff changeset
    27
  setWrapper, setSWrapper, compWrapper and compSWrapper are replaced by
4824
df8fc4626a9e *** empty log message ***
oheimb
parents: 4806
diff changeset
    28
  addWrapper, addSWrapper: claset * (string * wrapper) -> claset
df8fc4626a9e *** empty log message ***
oheimb
parents: 4806
diff changeset
    29
  delWrapper, delSWrapper: claset *  string            -> claset
4649
89ad3eb863a1 changed wrapper mechanism of classical reasoner
oheimb
parents: 4575
diff changeset
    30
  getWrapper is renamed to appWrappers, getSWrapper to appSWrappers;
89ad3eb863a1 changed wrapper mechanism of classical reasoner
oheimb
parents: 4575
diff changeset
    31
4842
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
    32
* inductive definitions now handle disjunctive premises correctly (HOL
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
    33
and ZF);
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
    34
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
    35
* new toplevel commands 'thm' and 'thms' for retrieving theorems from
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
    36
the current theory context;
4806
79cc986bc4d7 bug fixes
paulson
parents: 4801
diff changeset
    37
4858
4b15e9e1b3a5 new theory section 'nonterminals';
wenzelm
parents: 4842
diff changeset
    38
* new theory section 'nonterminals';
4b15e9e1b3a5 new theory section 'nonterminals';
wenzelm
parents: 4842
diff changeset
    39
4869
f3d30c02c1db new theory section 'setup';
wenzelm
parents: 4858
diff changeset
    40
* new theory section 'setup';
f3d30c02c1db new theory section 'setup';
wenzelm
parents: 4858
diff changeset
    41
4711
75a9ef36b1fe removed pred;
wenzelm
parents: 4683
diff changeset
    42
4661
paulson
parents: 4655
diff changeset
    43
*** HOL ***
paulson
parents: 4655
diff changeset
    44
4842
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
    45
* new force_tac (and its derivations Force_tac, force): combines
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
    46
rewriting and classical reasoning (and whatever other tools) similarly
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
    47
to auto_tac, but is aimed to solve the given subgoal totally;
4824
df8fc4626a9e *** empty log message ***
oheimb
parents: 4806
diff changeset
    48
4838
196100237656 cleanup for split_all_tac as wrapper in claset()
oheimb
parents: 4835
diff changeset
    49
* added option_map_eq_Some to simpset() and claset()
196100237656 cleanup for split_all_tac as wrapper in claset()
oheimb
parents: 4835
diff changeset
    50
4779
paulson
parents: 4766
diff changeset
    51
* New directory HOL/UNITY: Chandy and Misra's UNITY formalism
paulson
parents: 4766
diff changeset
    52
4842
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
    53
* split_all_tac is now much faster and fails if there is nothing to
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
    54
split.  Existing (fragile) proofs may require adaption because the
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
    55
order and the names of the automatically generated variables have
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
    56
changed.  split_all_tac has moved within claset() from usafe wrappers
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
    57
to safe wrappers, which means that !!-bound variables are splitted
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
    58
much more aggressively, and safe_tac and clarify_tac now split such
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
    59
variables.  If this splitting is not appropriate, use delSWrapper
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
    60
"split_all_tac".
4766
9658aab68363 *** empty log message ***
oheimb
parents: 4747
diff changeset
    61
4842
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
    62
* added disj_not1 = "(~P | Q) = (P --> Q)" to the default simpset;
4743
b3bfcbd9fb93 renamed not1_or to disj_not1, not2_or to disj_not2
oheimb
parents: 4730
diff changeset
    63
4842
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
    64
* HOL/Arithmetic:
4825
e4e56a1bcbe2 tidied; div & mod
paulson
parents: 4824
diff changeset
    65
  
e4e56a1bcbe2 tidied; div & mod
paulson
parents: 4824
diff changeset
    66
  - removed 'pred' (predecessor) function
e4e56a1bcbe2 tidied; div & mod
paulson
parents: 4824
diff changeset
    67
  - generalized some theorems about n-1
e4e56a1bcbe2 tidied; div & mod
paulson
parents: 4824
diff changeset
    68
  - Many new laws about "div" and "mod"
e4e56a1bcbe2 tidied; div & mod
paulson
parents: 4824
diff changeset
    69
  - New laws about greatest common divisors (see theory ex/Primes)
4747
bbe14a54deb3 inverse -> converse
paulson
parents: 4743
diff changeset
    70
4842
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
    71
* HOL/Relation: renamed the relational operatotr r^-1 "converse"
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
    72
instead of "inverse";
4711
75a9ef36b1fe removed pred;
wenzelm
parents: 4683
diff changeset
    73
4842
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
    74
* recdef can now declare non-recursive functions, with {} supplied as
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
    75
the well-founded relation;
4806
79cc986bc4d7 bug fixes
paulson
parents: 4801
diff changeset
    76
4880
312115d20c45 *** empty log message ***
nipkow
parents: 4879
diff changeset
    77
* expand_if, expand_split, expand_sum_case and expand_nat_case are now called
312115d20c45 *** empty log message ***
nipkow
parents: 4879
diff changeset
    78
  split_if, split_split, split_sum_case and split_nat_case
312115d20c45 *** empty log message ***
nipkow
parents: 4879
diff changeset
    79
  (to go with add/delsplits).
312115d20c45 *** empty log message ***
nipkow
parents: 4879
diff changeset
    80
4730
b1d916e8a853 Simplifier
nipkow
parents: 4711
diff changeset
    81
* Simplifier:
b1d916e8a853 Simplifier
nipkow
parents: 4711
diff changeset
    82
4835
f90a427d903f *** empty log message ***
nipkow
parents: 4828
diff changeset
    83
 -Rewrite rules for case distinctions can now be added permanently to the
f90a427d903f *** empty log message ***
nipkow
parents: 4828
diff changeset
    84
  default simpset using Addsplits just like Addsimps. They can be removed via
f90a427d903f *** empty log message ***
nipkow
parents: 4828
diff changeset
    85
  Delsplits just like Delsimps. Lower-case versions are also available.
f90a427d903f *** empty log message ***
nipkow
parents: 4828
diff changeset
    86
4880
312115d20c45 *** empty log message ***
nipkow
parents: 4879
diff changeset
    87
 -The rule split_if is now part of the default simpset. This means that
4683
de426efe87d3 *** empty log message ***
nipkow
parents: 4661
diff changeset
    88
  the simplifier will eliminate all ocurrences of if-then-else in the
4880
312115d20c45 *** empty log message ***
nipkow
parents: 4879
diff changeset
    89
  conclusion of a goal. To prevent this, you can either remove split_if
312115d20c45 *** empty log message ***
nipkow
parents: 4879
diff changeset
    90
  completely from the default simpset by `Delsplits [split_if]' or
4683
de426efe87d3 *** empty log message ***
nipkow
parents: 4661
diff changeset
    91
  remove it in a specific call of the simplifier using
4880
312115d20c45 *** empty log message ***
nipkow
parents: 4879
diff changeset
    92
  `... delsplits [split_if]'.
4683
de426efe87d3 *** empty log message ***
nipkow
parents: 4661
diff changeset
    93
  You can also add/delete other case splitting rules to/from the default
de426efe87d3 *** empty log message ***
nipkow
parents: 4661
diff changeset
    94
  simpset: every datatype generates a suitable rule `split_t_case' (where t
de426efe87d3 *** empty log message ***
nipkow
parents: 4661
diff changeset
    95
  is the name of the datatype).
de426efe87d3 *** empty log message ***
nipkow
parents: 4661
diff changeset
    96
4711
75a9ef36b1fe removed pred;
wenzelm
parents: 4683
diff changeset
    97
* new theory Vimage (inverse image of a function, syntax f-``B);
4661
paulson
parents: 4655
diff changeset
    98
4825
e4e56a1bcbe2 tidied; div & mod
paulson
parents: 4824
diff changeset
    99
* many new identities for unions, intersections, set difference, etc.;
4711
75a9ef36b1fe removed pred;
wenzelm
parents: 4683
diff changeset
   100
4879
58656c6a3551 "let" is no longer restricted to FOL terms and allows any logical terms
paulson
parents: 4869
diff changeset
   101
*** ZF ***
58656c6a3551 "let" is no longer restricted to FOL terms and allows any logical terms
paulson
parents: 4869
diff changeset
   102
58656c6a3551 "let" is no longer restricted to FOL terms and allows any logical terms
paulson
parents: 4869
diff changeset
   103
* in  let x=t in u(x), neither t nor u(x) has to be an FOL term.
4649
89ad3eb863a1 changed wrapper mechanism of classical reasoner
oheimb
parents: 4575
diff changeset
   104
4842
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
   105
4410
wenzelm
parents: 4388
diff changeset
   106
New in Isabelle98 (January 1998)
wenzelm
parents: 4388
diff changeset
   107
--------------------------------
wenzelm
parents: 4388
diff changeset
   108
wenzelm
parents: 4388
diff changeset
   109
*** Overview of INCOMPATIBILITIES (see below for more details) ***
wenzelm
parents: 4388
diff changeset
   110
wenzelm
parents: 4388
diff changeset
   111
* changed lexical syntax of terms / types: dots made part of long
wenzelm
parents: 4388
diff changeset
   112
identifiers, e.g. "%x.x" no longer possible, should be "%x. x";
wenzelm
parents: 4388
diff changeset
   113
wenzelm
parents: 4388
diff changeset
   114
* simpset (and claset) reference variable replaced by functions
wenzelm
parents: 4388
diff changeset
   115
simpset / simpset_ref;
wenzelm
parents: 4388
diff changeset
   116
wenzelm
parents: 4388
diff changeset
   117
* no longer supports theory aliases (via merge) and non-trivial
wenzelm
parents: 4388
diff changeset
   118
implicit merge of thms' signatures;
wenzelm
parents: 4388
diff changeset
   119
wenzelm
parents: 4388
diff changeset
   120
* most internal names of constants changed due to qualified names;
wenzelm
parents: 4388
diff changeset
   121
wenzelm
parents: 4388
diff changeset
   122
* changed Pure/Sequence interface (see Pure/seq.ML);
wenzelm
parents: 4388
diff changeset
   123
3454
40b1287347d7 removed;
wenzelm
parents: 3338
diff changeset
   124
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   125
*** General Changes ***
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   126
4174
wenzelm
parents: 4154
diff changeset
   127
* hierachically structured name spaces (for consts, types, axms, thms
3943
b6e0c90f3bf4 tuned qualified names;
wenzelm
parents: 3930
diff changeset
   128
etc.); new lexical class 'longid' (e.g. Foo.bar.x) may render much of
4108
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   129
old input syntactically incorrect (e.g. "%x.x"); COMPATIBILITY:
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   130
isatool fixdots ensures space after dots (e.g. "%x. x"); set
4174
wenzelm
parents: 4154
diff changeset
   131
long_names for fully qualified output names; NOTE: ML programs
wenzelm
parents: 4154
diff changeset
   132
(special tactics, packages etc.) referring to internal names may have
wenzelm
parents: 4154
diff changeset
   133
to be adapted to cope with fully qualified names; in case of severe
wenzelm
parents: 4154
diff changeset
   134
backward campatibility problems try setting 'global_names' at compile
wenzelm
parents: 4154
diff changeset
   135
time to have enrything declared within a flat name space; one may also
wenzelm
parents: 4154
diff changeset
   136
fine tune name declarations in theories via the 'global' and 'local'
wenzelm
parents: 4154
diff changeset
   137
section;
4108
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   138
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   139
* reimplemented the implicit simpset and claset using the new anytype
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   140
data filed in signatures; references simpset:simpset ref etc. are
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   141
replaced by functions simpset:unit->simpset and
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   142
simpset_ref:unit->simpset ref; COMPATIBILITY: use isatool fixclasimp
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   143
to patch your ML files accordingly;
3856
177c64693954 rearranged and added TLA
paulson
parents: 3851
diff changeset
   144
3857
16198fde5af5 browser info;
wenzelm
parents: 3856
diff changeset
   145
* HTML output now includes theory graph data for display with Java
16198fde5af5 browser info;
wenzelm
parents: 3856
diff changeset
   146
applet or isatool browser; data generated automatically via isatool
3901
wenzelm
parents: 3871
diff changeset
   147
usedir (see -i option, ISABELLE_USEDIR_OPTIONS);
3857
16198fde5af5 browser info;
wenzelm
parents: 3856
diff changeset
   148
3856
177c64693954 rearranged and added TLA
paulson
parents: 3851
diff changeset
   149
* defs may now be conditional; improved rewrite_goals_tac to handle
177c64693954 rearranged and added TLA
paulson
parents: 3851
diff changeset
   150
conditional equations;
177c64693954 rearranged and added TLA
paulson
parents: 3851
diff changeset
   151
4174
wenzelm
parents: 4154
diff changeset
   152
* defs now admits additional type arguments, using TYPE('a) syntax;
wenzelm
parents: 4154
diff changeset
   153
3901
wenzelm
parents: 3871
diff changeset
   154
* theory aliases via merge (e.g. M=A+B+C) no longer supported, always
wenzelm
parents: 3871
diff changeset
   155
creates a new theory node; implicit merge of thms' signatures is
4112
wenzelm
parents: 4108
diff changeset
   156
restricted to 'trivial' ones; COMPATIBILITY: one may have to use
3901
wenzelm
parents: 3871
diff changeset
   157
transfer:theory->thm->thm in (rare) cases;
wenzelm
parents: 3871
diff changeset
   158
3968
ec138de716d9 improved handling of draft signatures / theories; draft thms (and
wenzelm
parents: 3964
diff changeset
   159
* improved handling of draft signatures / theories; draft thms (and
ec138de716d9 improved handling of draft signatures / theories; draft thms (and
wenzelm
parents: 3964
diff changeset
   160
ctyps, cterms) are automatically promoted to real ones;
ec138de716d9 improved handling of draft signatures / theories; draft thms (and
wenzelm
parents: 3964
diff changeset
   161
3901
wenzelm
parents: 3871
diff changeset
   162
* slightly changed interfaces for oracles: admit many per theory, named
wenzelm
parents: 3871
diff changeset
   163
(e.g. oracle foo = mlfun), additional name argument for invoke_oracle;
wenzelm
parents: 3871
diff changeset
   164
wenzelm
parents: 3871
diff changeset
   165
* print_goals: optional output of const types (set show_consts and
wenzelm
parents: 3871
diff changeset
   166
show_types);
3851
fe9932a7cd46 print_goals: optional output of const types (set show_consts);
wenzelm
parents: 3846
diff changeset
   167
4388
wenzelm
parents: 4381
diff changeset
   168
* improved output of warnings (###) and errors (***);
3697
c5833dfcc2cc Pure: fixed idt/idts vs. pttrn/pttrns syntactic categories;
wenzelm
parents: 3671
diff changeset
   169
4178
e64ff1c1bc70 subgoal_tac displays a warning if the new subgoal has type variables
paulson
parents: 4174
diff changeset
   170
* subgoal_tac displays a warning if the new subgoal has type variables;
e64ff1c1bc70 subgoal_tac displays a warning if the new subgoal has type variables
paulson
parents: 4174
diff changeset
   171
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   172
* removed old README and Makefiles;
3697
c5833dfcc2cc Pure: fixed idt/idts vs. pttrn/pttrns syntactic categories;
wenzelm
parents: 3671
diff changeset
   173
3856
177c64693954 rearranged and added TLA
paulson
parents: 3851
diff changeset
   174
* replaced print_goals_ref hook by print_current_goals_fn and result_error_fn;
3670
9fea3562f8c7 replaced print_goals_ref hook by print_current_goals_fn and
wenzelm
parents: 3658
diff changeset
   175
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   176
* removed obsolete init_pps and init_database;
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   177
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   178
* deleted the obsolete tactical STATE, which was declared by
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   179
    fun STATE tacfun st = tacfun st st;
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   180
4388
wenzelm
parents: 4381
diff changeset
   181
* cd and use now support path variables, e.g. $ISABELLE_HOME, or ~
wenzelm
parents: 4381
diff changeset
   182
(which abbreviates $HOME);
4269
a045600f0c98 cd, use etc. now support path variables;
wenzelm
parents: 4207
diff changeset
   183
a045600f0c98 cd, use etc. now support path variables;
wenzelm
parents: 4207
diff changeset
   184
* changed Pure/Sequence interface (see Pure/seq.ML); COMPATIBILITY:
a045600f0c98 cd, use etc. now support path variables;
wenzelm
parents: 4207
diff changeset
   185
use isatool fixseq to adapt your ML programs (this works for fully
a045600f0c98 cd, use etc. now support path variables;
wenzelm
parents: 4207
diff changeset
   186
qualified references to the Sequence structure only!);
a045600f0c98 cd, use etc. now support path variables;
wenzelm
parents: 4207
diff changeset
   187
4381
wenzelm
parents: 4373
diff changeset
   188
* use_thy no longer requires writable current directory; it always
wenzelm
parents: 4373
diff changeset
   189
reloads .ML *and* .thy file, if either one is out of date;
4269
a045600f0c98 cd, use etc. now support path variables;
wenzelm
parents: 4207
diff changeset
   190
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   191
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   192
*** Classical Reasoner ***
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   193
3744
wenzelm
parents: 3719
diff changeset
   194
* Clarify_tac, clarify_tac, clarify_step_tac, Clarify_step_tac: new
wenzelm
parents: 3719
diff changeset
   195
tactics that use classical reasoning to simplify a subgoal without
wenzelm
parents: 3719
diff changeset
   196
splitting it into several subgoals;
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   197
3719
6a142dab2a08 Safe_tac; qed_spec_mp in FOL
paulson
parents: 3715
diff changeset
   198
* Safe_tac: like safe_tac but uses the default claset;
6a142dab2a08 Safe_tac; qed_spec_mp in FOL
paulson
parents: 3715
diff changeset
   199
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   200
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   201
*** Simplifier ***
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   202
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   203
* added simplification meta rules:
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   204
    (asm_)(full_)simplify: simpset -> thm -> thm;
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   205
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   206
* simplifier.ML no longer part of Pure -- has to be loaded by object
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   207
logics (again);
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   208
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   209
* added prems argument to simplification procedures;
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   210
4325
e72cba5af6c5 addsplits now in FOL, ZF too
paulson
parents: 4269
diff changeset
   211
* HOL, FOL, ZF: added infix function `addsplits':
e72cba5af6c5 addsplits now in FOL, ZF too
paulson
parents: 4269
diff changeset
   212
  instead of `<simpset> setloop (split_tac <thms>)'
e72cba5af6c5 addsplits now in FOL, ZF too
paulson
parents: 4269
diff changeset
   213
  you can simply write `<simpset> addsplits <thms>'
e72cba5af6c5 addsplits now in FOL, ZF too
paulson
parents: 4269
diff changeset
   214
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   215
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   216
*** Syntax ***
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   217
4174
wenzelm
parents: 4154
diff changeset
   218
* TYPE('a) syntax for type reflection terms;
wenzelm
parents: 4154
diff changeset
   219
3985
wenzelm
parents: 3982
diff changeset
   220
* no longer handles consts with name "" -- declare as 'syntax' instead;
3856
177c64693954 rearranged and added TLA
paulson
parents: 3851
diff changeset
   221
177c64693954 rearranged and added TLA
paulson
parents: 3851
diff changeset
   222
* pretty printer: changed order of mixfix annotation preference (again!);
3846
6061fa463784 hierachically structured name spaces;
wenzelm
parents: 3822
diff changeset
   223
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   224
* Pure: fixed idt/idts vs. pttrn/pttrns syntactic categories;
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   225
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   226
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   227
*** HOL ***
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   228
4207
061919f8da9c renamed split_prem_tac to split_asm_tac
oheimb
parents: 4189
diff changeset
   229
* HOL: there is a new splitter `split_asm_tac' that can be used e.g. 
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   230
  with `addloop' of the simplifier to faciliate case splitting in premises.
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   231
4035
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   232
* HOL/TLA: Stephan Merz's formalization of Lamport's Temporal Logic of Actions;
3985
wenzelm
parents: 3982
diff changeset
   233
wenzelm
parents: 3982
diff changeset
   234
* HOL/Auth: new protocol proofs including some for the Internet
4035
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   235
  protocol TLS;
3985
wenzelm
parents: 3982
diff changeset
   236
4125
wenzelm
parents: 4123
diff changeset
   237
* HOL/Map: new theory of `maps' a la VDM;
3982
2a903ba8d39e HOL/Map
nipkow
parents: 3968
diff changeset
   238
4335
b0acd74da01d nat_cancel simprocs;
wenzelm
parents: 4325
diff changeset
   239
* HOL/simplifier: simplification procedures nat_cancel_sums for
b0acd74da01d nat_cancel simprocs;
wenzelm
parents: 4325
diff changeset
   240
cancelling out common nat summands from =, <, <= (in)equalities, or
b0acd74da01d nat_cancel simprocs;
wenzelm
parents: 4325
diff changeset
   241
differences; simplification procedures nat_cancel_factor for
b0acd74da01d nat_cancel simprocs;
wenzelm
parents: 4325
diff changeset
   242
cancelling common factor from =, <, <= (in)equalities over natural
4373
2f831a45d571 nat_cancel enabled by default;
wenzelm
parents: 4370
diff changeset
   243
sums; nat_cancel contains both kinds of procedures, it is installed by
2f831a45d571 nat_cancel enabled by default;
wenzelm
parents: 4370
diff changeset
   244
default in Arith.thy -- this COULD MAKE EXISTING PROOFS FAIL;
4335
b0acd74da01d nat_cancel simprocs;
wenzelm
parents: 4325
diff changeset
   245
3580
04c6ae944b5e new simproc
nipkow
parents: 3579
diff changeset
   246
* HOL/simplifier: terms of the form
4325
e72cba5af6c5 addsplits now in FOL, ZF too
paulson
parents: 4269
diff changeset
   247
  `? x. P1(x) & ... & Pn(x) & x=t & Q1(x) & ... Qn(x)'  (or t=x)
3580
04c6ae944b5e new simproc
nipkow
parents: 3579
diff changeset
   248
  are rewritten to
4035
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   249
  `P1(t) & ... & Pn(t) & Q1(t) & ... Qn(t)',
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   250
  and those of the form
4325
e72cba5af6c5 addsplits now in FOL, ZF too
paulson
parents: 4269
diff changeset
   251
  `! x. P1(x) & ... & Pn(x) & x=t & Q1(x) & ... Qn(x) --> R(x)'  (or t=x)
4035
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   252
  are rewritten to
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   253
  `P1(t) & ... & Pn(t) & Q1(t) & ... Qn(t) --> R(t)',
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   254
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   255
* HOL/datatype
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   256
  Each datatype `t' now comes with a theorem `split_t_case' of the form
3580
04c6ae944b5e new simproc
nipkow
parents: 3579
diff changeset
   257
4035
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   258
  P(t_case f1 ... fn x) =
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   259
     ( (!y1 ... ym1. x = C1 y1 ... ym1 --> P(f1 y1 ... ym1)) &
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   260
        ...
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   261
       (!y1 ... ymn. x = Cn y1 ... ymn --> P(f1 y1 ... ymn))
4035
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   262
     )
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   263
4070
3a6e1e562aed *** empty log message ***
nipkow
parents: 4035
diff changeset
   264
  which can be added to a simpset via `addsplits'. The existing theorems
3a6e1e562aed *** empty log message ***
nipkow
parents: 4035
diff changeset
   265
  expand_list_case and expand_option_case have been renamed to
3a6e1e562aed *** empty log message ***
nipkow
parents: 4035
diff changeset
   266
  split_list_case and split_option_case.
4035
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   267
4207
061919f8da9c renamed split_prem_tac to split_asm_tac
oheimb
parents: 4189
diff changeset
   268
  Additionally, there is a theorem `split_t_case_asm' of the form
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   269
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   270
  P(t_case f1 ... fn x) =
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   271
    ~( (? y1 ... ym1. x = C1 y1 ... ym1 & ~P(f1 y1 ... ym1)) |
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   272
        ...
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   273
       (? y1 ... ymn. x = Cn y1 ... ymn & ~P(f1 y1 ... ymn))
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   274
     )
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   275
4207
061919f8da9c renamed split_prem_tac to split_asm_tac
oheimb
parents: 4189
diff changeset
   276
  it be used with the new `split_asm_tac'.
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   277
4361
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
   278
* HOL/Arithmetic:
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
   279
  - `pred n' is automatically converted to `n-1'.
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
   280
    Users are strongly encouraged not to use `pred' any longer,
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
   281
    because it will disappear altogether at some point.
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
   282
  - Users are strongly encouraged to write "0 < n" rather than
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
   283
    "n ~= 0". Theorems and proof tools have been modified towards this
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
   284
    `standard'.
4357
b852e2d2a39a n ~= 0 should become 0 < n
nipkow
parents: 4335
diff changeset
   285
4502
337c073de95e nth -> !
nipkow
parents: 4410
diff changeset
   286
* HOL/Lists:
337c073de95e nth -> !
nipkow
parents: 4410
diff changeset
   287
  the function "set_of_list" has been renamed "set" (and its theorems too);
337c073de95e nth -> !
nipkow
parents: 4410
diff changeset
   288
  the function "nth" now takes its arguments in the reverse order and
337c073de95e nth -> !
nipkow
parents: 4410
diff changeset
   289
  has acquired the infix notation "!" as in "xs!n".
3570
d3662f90c453 set_of_list -> set
paulson
parents: 3567
diff changeset
   290
4154
17a3a2c5a35f UNIV & UNION1
paulson
parents: 4125
diff changeset
   291
* HOL/Set: UNIV is now a constant and is no longer translated to Compl{};
17a3a2c5a35f UNIV & UNION1
paulson
parents: 4125
diff changeset
   292
17a3a2c5a35f UNIV & UNION1
paulson
parents: 4125
diff changeset
   293
* HOL/Set: The operator (UN x.B x) now abbreviates (UN x:UNIV. B x) and its
17a3a2c5a35f UNIV & UNION1
paulson
parents: 4125
diff changeset
   294
  specialist theorems (like UN1_I) are gone.  Similarly for (INT x.B x);
17a3a2c5a35f UNIV & UNION1
paulson
parents: 4125
diff changeset
   295
4575
e59cf7d816fe HOL/record;
wenzelm
parents: 4502
diff changeset
   296
* HOL/record: extensible records with schematic structural subtyping
e59cf7d816fe HOL/record;
wenzelm
parents: 4502
diff changeset
   297
(single inheritance); EXPERIMENTAL version demonstrating the encoding,
e59cf7d816fe HOL/record;
wenzelm
parents: 4502
diff changeset
   298
still lacks various theorems and concrete record syntax;
e59cf7d816fe HOL/record;
wenzelm
parents: 4502
diff changeset
   299
4125
wenzelm
parents: 4123
diff changeset
   300
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   301
*** HOLCF ***
3535
19bd6c8274c4 defs may now be conditional;
wenzelm
parents: 3511
diff changeset
   302
4125
wenzelm
parents: 4123
diff changeset
   303
* removed "axioms" and "generated by" sections;
wenzelm
parents: 4123
diff changeset
   304
4123
9600dd68d35b *** empty log message ***
oheimb
parents: 4112
diff changeset
   305
* replaced "ops" section by extended "consts" section, which is capable of
4125
wenzelm
parents: 4123
diff changeset
   306
  handling the continuous function space "->" directly;
wenzelm
parents: 4123
diff changeset
   307
wenzelm
parents: 4123
diff changeset
   308
* domain package:
wenzelm
parents: 4123
diff changeset
   309
  . proves theorems immediately and stores them in the theory,
wenzelm
parents: 4123
diff changeset
   310
  . creates hierachical name space,
wenzelm
parents: 4123
diff changeset
   311
  . now uses normal mixfix annotations (instead of cinfix...),
wenzelm
parents: 4123
diff changeset
   312
  . minor changes to some names and values (for consistency),
wenzelm
parents: 4123
diff changeset
   313
  . e.g. cases -> casedist, dists_eq -> dist_eqs, [take_lemma] -> take_lemmas,
wenzelm
parents: 4123
diff changeset
   314
  . separator between mutual domain defs: changed "," to "and",
wenzelm
parents: 4123
diff changeset
   315
  . improved handling of sort constraints;  now they have to
wenzelm
parents: 4123
diff changeset
   316
    appear on the left-hand side of the equations only;
4123
9600dd68d35b *** empty log message ***
oheimb
parents: 4112
diff changeset
   317
9600dd68d35b *** empty log message ***
oheimb
parents: 4112
diff changeset
   318
* fixed LAM <x,y,zs>.b syntax;
3567
e2539e1980b4 added simplification meta rules;
wenzelm
parents: 3561
diff changeset
   319
3744
wenzelm
parents: 3719
diff changeset
   320
* added extended adm_tac to simplifier in HOLCF -- can now discharge
wenzelm
parents: 3719
diff changeset
   321
adm (%x. P (t x)), where P is chainfinite and t continuous;
3579
8bd9b4b3b61d *** empty log message ***
wenzelm
parents: 3570
diff changeset
   322
8bd9b4b3b61d *** empty log message ***
wenzelm
parents: 3570
diff changeset
   323
3719
6a142dab2a08 Safe_tac; qed_spec_mp in FOL
paulson
parents: 3715
diff changeset
   324
*** FOL and ZF ***
6a142dab2a08 Safe_tac; qed_spec_mp in FOL
paulson
parents: 3715
diff changeset
   325
4207
061919f8da9c renamed split_prem_tac to split_asm_tac
oheimb
parents: 4189
diff changeset
   326
* FOL: there is a new splitter `split_asm_tac' that can be used e.g. 
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   327
  with `addloop' of the simplifier to faciliate case splitting in premises.
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   328
3744
wenzelm
parents: 3719
diff changeset
   329
* qed_spec_mp, qed_goal_spec_mp, qed_goalw_spec_mp are available, as
wenzelm
parents: 3719
diff changeset
   330
in HOL, they strip ALL and --> from proved theorems;
wenzelm
parents: 3719
diff changeset
   331
3719
6a142dab2a08 Safe_tac; qed_spec_mp in FOL
paulson
parents: 3715
diff changeset
   332
3579
8bd9b4b3b61d *** empty log message ***
wenzelm
parents: 3570
diff changeset
   333
3006
wenzelm
parents: 3002
diff changeset
   334
New in Isabelle94-8 (May 1997)
wenzelm
parents: 3002
diff changeset
   335
------------------------------
2654
6efa602921d1 *** empty log message ***
wenzelm
parents: 2653
diff changeset
   336
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   337
*** General Changes ***
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   338
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   339
* new utilities to build / run / maintain Isabelle etc. (in parts
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   340
still somewhat experimental); old Makefiles etc. still functional;
2971
c1e1e8406fb2 *** empty log message ***
wenzelm
parents: 2927
diff changeset
   341
3205
816a1f9fd620 *** empty log message ***
wenzelm
parents: 3116
diff changeset
   342
* new 'Isabelle System Manual';
816a1f9fd620 *** empty log message ***
wenzelm
parents: 3116
diff changeset
   343
2825
a94dba60d5f2 *** empty log message ***
wenzelm
parents: 2773
diff changeset
   344
* INSTALL text, together with ./configure and ./build scripts;
2773
36fdd908a26c *** empty log message ***
wenzelm
parents: 2756
diff changeset
   345
3006
wenzelm
parents: 3002
diff changeset
   346
* reimplemented type inference for greater efficiency, better error
wenzelm
parents: 3002
diff changeset
   347
messages and clean internal interface;
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   348
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   349
* prlim command for dealing with lots of subgoals (an easier way of
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   350
setting goals_limit);
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   351
3006
wenzelm
parents: 3002
diff changeset
   352
wenzelm
parents: 3002
diff changeset
   353
*** Syntax ***
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   354
3116
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
   355
* supports alternative (named) syntax tables (parser and pretty
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
   356
printer); internal interface is provided by add_modesyntax(_i);
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
   357
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   358
* Pure, FOL, ZF, HOL, HOLCF now support symbolic input and output; to
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   359
be used in conjunction with the Isabelle symbol font; uses the
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   360
"symbols" syntax table;
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   361
2705
d6e83a02061d *** empty log message ***
wenzelm
parents: 2654
diff changeset
   362
* added token_translation interface (may translate name tokens in
2756
643cba384a61 *** empty log message ***
wenzelm
parents: 2747
diff changeset
   363
arbitrary ways, dependent on their type (free, bound, tfree, ...) and
3116
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
   364
the current print_mode); IMPORTANT: user print translation functions
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
   365
are responsible for marking newly introduced bounds
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
   366
(Syntax.mark_boundT);
2705
d6e83a02061d *** empty log message ***
wenzelm
parents: 2654
diff changeset
   367
2730
865995b744f5 *** empty log message ***
wenzelm
parents: 2726
diff changeset
   368
* token translations for modes "xterm" and "xterm_color" that display
3006
wenzelm
parents: 3002
diff changeset
   369
names in bold, underline etc. or colors (which requires a color
wenzelm
parents: 3002
diff changeset
   370
version of xterm);
2730
865995b744f5 *** empty log message ***
wenzelm
parents: 2726
diff changeset
   371
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   372
* infixes may now be declared with names independent of their syntax;
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   373
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   374
* added typed_print_translation (like print_translation, but may
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   375
access type of constant);
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   376
3006
wenzelm
parents: 3002
diff changeset
   377
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   378
*** Classical Reasoner ***
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   379
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   380
Blast_tac: a new tactic!  It is often more powerful than fast_tac, but has
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   381
some limitations.  Blast_tac...
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   382
  + ignores addss, addbefore, addafter; this restriction is intrinsic
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   383
  + ignores elimination rules that don't have the correct format
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   384
	(the conclusion MUST be a formula variable)
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   385
  + ignores types, which can make HOL proofs fail
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   386
  + rules must not require higher-order unification, e.g. apply_type in ZF
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   387
    [message "Function Var's argument not a bound variable" relates to this]
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   388
  + its proof strategy is more general but can actually be slower
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   389
3107
wenzelm
parents: 3042
diff changeset
   390
* substitution with equality assumptions no longer permutes other
wenzelm
parents: 3042
diff changeset
   391
assumptions;
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   392
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   393
* minor changes in semantics of addafter (now called addaltern); renamed
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   394
setwrapper to setWrapper and compwrapper to compWrapper; added safe wrapper
3107
wenzelm
parents: 3042
diff changeset
   395
(and access functions for it);
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   396
3317
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
   397
* improved combination of classical reasoner and simplifier: 
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
   398
  + functions for handling clasimpsets
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
   399
  + improvement of addss: now the simplifier is called _after_ the
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
   400
    safe steps.
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
   401
  + safe variant of addss called addSss: uses safe simplifications
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
   402
    _during_ the safe steps. It is more complete as it allows multiple 
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
   403
    instantiations of unknowns (e.g. with slow_tac).
3006
wenzelm
parents: 3002
diff changeset
   404
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   405
*** Simplifier ***
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   406
3006
wenzelm
parents: 3002
diff changeset
   407
* added interface for simplification procedures (functions that
wenzelm
parents: 3002
diff changeset
   408
produce *proven* rewrite rules on the fly, depending on current
wenzelm
parents: 3002
diff changeset
   409
redex);
wenzelm
parents: 3002
diff changeset
   410
wenzelm
parents: 3002
diff changeset
   411
* ordering on terms as parameter (used for ordered rewriting);
wenzelm
parents: 3002
diff changeset
   412
3107
wenzelm
parents: 3042
diff changeset
   413
* new functions delcongs, deleqcongs, and Delcongs. richer rep_ss;
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   414
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   415
* the solver is now split into a safe and an unsafe part.
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   416
This should be invisible for the normal user, except that the
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   417
functions setsolver and addsolver have been renamed to setSolver and
3107
wenzelm
parents: 3042
diff changeset
   418
addSolver; added safe_asm_full_simp_tac;
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   419
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   420
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   421
*** HOL ***
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   422
3042
21cd332b65d3 induct_tac
nipkow
parents: 3006
diff changeset
   423
* a generic induction tactic `induct_tac' which works for all datatypes and
3107
wenzelm
parents: 3042
diff changeset
   424
also for type `nat';
3042
21cd332b65d3 induct_tac
nipkow
parents: 3006
diff changeset
   425
3316
nipkow
parents: 3227
diff changeset
   426
* a generic case distinction tactic `exhaust_tac' which works for all
nipkow
parents: 3227
diff changeset
   427
datatypes and also for type `nat';
nipkow
parents: 3227
diff changeset
   428
nipkow
parents: 3227
diff changeset
   429
* each datatype comes with a function `size';
nipkow
parents: 3227
diff changeset
   430
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   431
* patterns in case expressions allow tuple patterns as arguments to
3107
wenzelm
parents: 3042
diff changeset
   432
constructors, for example `case x of [] => ... | (x,y,z)#ps => ...';
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   433
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   434
* primrec now also works with type nat;
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   435
3338
b99d750f6a37 Added recdef
paulson
parents: 3321
diff changeset
   436
* recdef: a new declaration form, allows general recursive functions to be
b99d750f6a37 Added recdef
paulson
parents: 3321
diff changeset
   437
defined in theory files.  See HOL/ex/Fib, HOL/ex/Primes, HOL/Subst/Unify.
b99d750f6a37 Added recdef
paulson
parents: 3321
diff changeset
   438
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   439
* the constant for negation has been renamed from "not" to "Not" to
3107
wenzelm
parents: 3042
diff changeset
   440
harmonize with FOL, ZF, LK, etc.;
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   441
3107
wenzelm
parents: 3042
diff changeset
   442
* HOL/ex/LFilter theory of a corecursive "filter" functional for
wenzelm
parents: 3042
diff changeset
   443
infinite lists;
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   444
3227
9190438471ea *** empty log message ***
wenzelm
parents: 3205
diff changeset
   445
* HOL/Modelcheck demonstrates invocation of model checker oracle;
9190438471ea *** empty log message ***
wenzelm
parents: 3205
diff changeset
   446
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   447
* HOL/ex/Ring.thy declares cring_simp, which solves equational
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   448
problems in commutative rings, using axiomatic type classes for + and *;
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   449
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   450
* more examples in HOL/MiniML and HOL/Auth;
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   451
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   452
* more default rewrite rules for quantifiers, union/intersection;
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   453
3321
c609a0119fd8 arbitrary
nipkow
parents: 3317
diff changeset
   454
* a new constant `arbitrary == @x.False';
c609a0119fd8 arbitrary
nipkow
parents: 3317
diff changeset
   455
3107
wenzelm
parents: 3042
diff changeset
   456
* HOLCF/IOA replaces old HOL/IOA;
wenzelm
parents: 3042
diff changeset
   457
2653
f1a6997cdc06 described changes for HOLCF-Version without rules and arities
slotosch
parents: 2649
diff changeset
   458
* HOLCF changes: derived all rules and arities 
f1a6997cdc06 described changes for HOLCF-Version without rules and arities
slotosch
parents: 2649
diff changeset
   459
  + axiomatic type classes instead of classes 
f1a6997cdc06 described changes for HOLCF-Version without rules and arities
slotosch
parents: 2649
diff changeset
   460
  + typedef instead of faking type definitions
2747
9fdc1461085f Tidied and updated
paulson
parents: 2732
diff changeset
   461
  + eliminated the internal constants less_fun, less_cfun, UU_fun, UU_cfun etc.
2730
865995b744f5 *** empty log message ***
wenzelm
parents: 2726
diff changeset
   462
  + new axclasses cpo, chfin, flat with flat < chfin < pcpo < cpo < po
2653
f1a6997cdc06 described changes for HOLCF-Version without rules and arities
slotosch
parents: 2649
diff changeset
   463
  + eliminated the types void, one, tr
f1a6997cdc06 described changes for HOLCF-Version without rules and arities
slotosch
parents: 2649
diff changeset
   464
  + use unit lift and bool lift (with translations) instead of one and tr
f1a6997cdc06 described changes for HOLCF-Version without rules and arities
slotosch
parents: 2649
diff changeset
   465
  + eliminated blift from Lift3.thy (use Def instead of blift)
3107
wenzelm
parents: 3042
diff changeset
   466
  all eliminated rules are derived as theorems --> no visible changes ;
2649
2edc5b01e5a7 improved description of recent changes
oheimb
parents: 2639
diff changeset
   467
3006
wenzelm
parents: 3002
diff changeset
   468
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   469
*** ZF ***
2553
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
   470
2865
77daca16b2f4 ZF.thy is again usable
paulson
parents: 2825
diff changeset
   471
* ZF now has Fast_tac, Simp_tac and Auto_tac.  Union_iff is a now a default
77daca16b2f4 ZF.thy is again usable
paulson
parents: 2825
diff changeset
   472
rewrite rule; this may affect some proofs.  eq_cs is gone but can be put back
77daca16b2f4 ZF.thy is again usable
paulson
parents: 2825
diff changeset
   473
as ZF_cs addSIs [equalityI];
2553
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
   474
2554
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   475
2732
84fc9c3b6bf0 *** empty log message ***
wenzelm
parents: 2731
diff changeset
   476
2553
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
   477
New in Isabelle94-7 (November 96)
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
   478
---------------------------------
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
   479
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
   480
* allowing negative levels (as offsets) in prlev and choplev;
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
   481
2554
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   482
* super-linear speedup for large simplifications;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   483
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   484
* FOL, ZF and HOL now use miniscoping: rewriting pushes
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   485
quantifications in as far as possible (COULD MAKE EXISTING PROOFS
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   486
FAIL); can suppress it using the command Delsimps (ex_simps @
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   487
all_simps); De Morgan laws are also now included, by default;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   488
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   489
* improved printing of ==>  :  ~:
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   490
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   491
* new object-logic "Sequents" adds linear logic, while replacing LK
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   492
and Modal (thanks to Sara Kalvala);
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   493
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   494
* HOL/Auth: correctness proofs for authentication protocols;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   495
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   496
* HOL: new auto_tac combines rewriting and classical reasoning (many
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   497
examples on HOL/Auth);
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   498
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   499
* HOL: new command AddIffs for declaring theorems of the form P=Q to
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   500
the rewriter and classical reasoner simultaneously;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   501
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   502
* function uresult no longer returns theorems in "standard" format;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   503
regain previous version by: val uresult = standard o uresult;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   504
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   505
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   506
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   507
New in Isabelle94-6
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   508
-------------------
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   509
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   510
* oracles -- these establish an interface between Isabelle and trusted
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   511
external reasoners, which may deliver results as theorems;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   512
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   513
* proof objects (in particular record all uses of oracles);
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   514
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   515
* Simp_tac, Fast_tac, etc. that refer to implicit simpset / claset;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   516
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   517
* "constdefs" section in theory files;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   518
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   519
* "primrec" section (HOL) no longer requires names;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   520
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   521
* internal type "tactic" now simply "thm -> thm Sequence.seq";
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   522
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   523
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   524
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   525
New in Isabelle94-5
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   526
-------------------
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   527
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   528
* reduced space requirements;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   529
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   530
* automatic HTML generation from theories;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   531
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   532
* theory files no longer require "..." (quotes) around most types;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   533
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   534
* new examples, including two proofs of the Church-Rosser theorem;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   535
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   536
* non-curried (1994) version of HOL is no longer distributed;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   537
2553
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
   538
2557
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   539
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   540
New in Isabelle94-4
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   541
-------------------
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   542
2747
9fdc1461085f Tidied and updated
paulson
parents: 2732
diff changeset
   543
* greatly reduced space requirements;
2557
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   544
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   545
* theory files (.thy) no longer require \...\ escapes at line breaks;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   546
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   547
* searchable theorem database (see the section "Retrieving theorems" on 
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   548
page 8 of the Reference Manual);
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   549
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   550
* new examples, including Grabczewski's monumental case study of the
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   551
Axiom of Choice;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   552
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   553
* The previous version of HOL renamed to Old_HOL;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   554
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   555
* The new version of HOL (previously called CHOL) uses a curried syntax 
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   556
for functions.  Application looks like f a b instead of f(a,b);
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   557
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   558
* Mutually recursive inductive definitions finally work in HOL;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   559
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   560
* In ZF, pattern-matching on tuples is now available in all abstractions and
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   561
translates to the operator "split";
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   562
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   563
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   564
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   565
New in Isabelle94-3
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   566
-------------------
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   567
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   568
* new infix operator, addss, allowing the classical reasoner to 
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   569
perform simplification at each step of its search.  Example:
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   570
	fast_tac (cs addss ss)
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   571
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   572
* a new logic, CHOL, the same as HOL, but with a curried syntax 
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   573
for functions.  Application looks like f a b instead of f(a,b).  Also pairs 
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   574
look like (a,b) instead of <a,b>;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   575
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   576
* PLEASE NOTE: CHOL will eventually replace HOL!
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   577
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   578
* In CHOL, pattern-matching on tuples is now available in all abstractions.
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   579
It translates to the operator "split".  A new theory of integers is available;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   580
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   581
* In ZF, integer numerals now denote two's-complement binary integers.
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   582
Arithmetic operations can be performed by rewriting.  See ZF/ex/Bin.ML;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   583
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   584
* Many new examples: I/O automata, Church-Rosser theorem, equivalents 
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   585
of the Axiom of Choice;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   586
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   587
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   588
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   589
New in Isabelle94-2
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   590
-------------------
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   591
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   592
* Significantly faster resolution;  
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   593
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   594
* the different sections in a .thy file can now be mixed and repeated
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   595
freely;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   596
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   597
* Database of theorems for FOL, HOL and ZF.  New
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   598
commands including qed, qed_goal and bind_thm store theorems in the database.
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   599
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   600
* Simple database queries: return a named theorem (get_thm) or all theorems of
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   601
a given theory (thms_of), or find out what theory a theorem was proved in
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   602
(theory_of_thm);
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   603
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   604
* Bugs fixed in the inductive definition and datatype packages;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   605
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   606
* The classical reasoner provides deepen_tac and depth_tac, making FOL_dup_cs
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   607
and HOL_dup_cs obsolete;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   608
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   609
* Syntactic ambiguities caused by the new treatment of syntax in Isabelle94-1
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   610
have been removed;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   611
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   612
* Simpler definition of function space in ZF;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   613
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   614
* new results about cardinal and ordinal arithmetic in ZF;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   615
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   616
* 'subtype' facility in HOL for introducing new types as subsets of existing
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   617
types;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   618
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   619
2553
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
   620
$Id$