NEWS
author wenzelm
Sun, 28 May 2000 21:55:50 +0200
changeset 8991 dc70b797827f
parent 8967 00f18476ac15
child 8994 803533fbb3ec
permissions -rw-r--r--
case 'antecedent';
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Isabelle NEWS -- history user-relevant changes
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==============================================
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ed941505cab7 Isabelle NEWS -- history of user-visible changes;
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New in this Isabelle version
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----------------------------
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*** Overview of INCOMPATIBILITIES (see below for more details) ***
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* HOL: simplification of natural numbers is much changed; to partly
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recover the old behaviour (e.g. to prevent n+n rewriting to #2*n)
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issue the following ML commands:
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  Delsimprocs Nat_Numeral_Simprocs.cancel_numerals;
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  Delsimprocs [Nat_Numeral_Simprocs.combine_numerals];
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* HOL: 0 is now overloaded, so the type constraint ::nat may sometimes be
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needed;
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* HOL: the constant for f``x is now "image" rather than "op ``";
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* HOL: the cartesian product is now "<*>" instead of "Times"; the
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lexicographic product is now "<*lex*>" instead of "**";
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* HOL: exhaust_tac on datatypes superceded by new generic case_tac;
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* HOL: simplification no longer dives into case-expressions
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* HOL: the recursion equations generated by 'recdef' are now called
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f.simps instead of f.rules;
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* HOL: theory Sexp now in HOL/Induct examples (used to be part of main
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HOL, but was unused); should better use HOL's datatype package anyway;
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* HOL/Real: "rabs" replaced by overloaded "abs" function;
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* HOL/ML: even fewer consts are declared as global (see theories Ord,
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Lfp, Gfp, WF); this only affects ML packages that refer to const names
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internally;
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* Isar: changed syntax of local blocks from {{ }} to { };
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* ML: PureThy.add_thms/add_axioms/add_defs return theorems as well;
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* LaTeX: several improvements of isabelle.sty;
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*** Document preparation ***
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* isatool mkdir provides easy setup of Isabelle session directories,
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including proper document sources;
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a57d72b5d272 * isatool mkdir provides easy setup of Isabelle session directories,
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* generated LaTeX sources are now deleted after successful run
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(isatool document -c); may retain a copy somewhere else via -D option
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of isatool usedir;
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* isatool usedir -D now lets isatool latex -o sty update the Isabelle
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style files, achieving self-contained LaTeX sources;
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* old-style theories now produce (crude) LaTeX output as well;
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*** Isar ***
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* Pure: local results and corresponding term bindings are now subject
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to Hindley-Milner polymorphism (similar to ML); this accommodates
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incremental type-inference nicely;
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* Pure: new 'obtain' language element supports generalized existence
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reasoning;
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* Pure: new calculational elements 'moreover' and 'ultimately' support
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plain accumulation of results, without applying any rules yet;
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* Pure: scalable support for case-analysis type proofs: new 'case'
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language element refers to local contexts symbolically, as produced by
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certain proof methods; internally, case names are attached to theorems
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as "tags";
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* Pure: changed syntax of local blocks from {{ }} to { };
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* Pure: syntax of sorts made inner, i.e. have to write "{a, b, c}"
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instead of {a, b, c};
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* Pure now provides its own version of intro/elim/dest attributes;
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useful for building new logics, but beware of confusion with the
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Provers/classical ones;
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* Pure: the local context of (non-atomic) goals is provided via case
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name 'antecedent';
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* Provers: splitter support (via 'split' attribute and 'simp' method
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modifier); 'simp' method: 'only:' modifier removes loopers as well
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(including splits);
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* HOL: new proof method 'cases' and improved version of 'induct' now
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support named cases; major packages (inductive, datatype, primrec,
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recdef) support case names and properly name parameters;
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* HOL: removed 'case_split' thm binding, should use 'cases' proof
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method anyway;
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* names of theorems etc. may be natural numbers as well;
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* Provers: intro/elim/dest attributes: changed ! / !! flags to ? / ??;
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* 'pr' command: optional goals_limit argument; no longer prints theory
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contexts, but only proof states;
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* diagnostic commands 'pr', 'thm', 'prop', 'term', 'typ' admit
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additional print modes to be specified; e.g. "pr(latex)" will print
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proof state according to the Isabelle LaTeX style;
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* improved support for emulating tactic scripts, including proof
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methods 'tactic', 'res_inst_tac' etc., 'subgoal_tac', and 'case_tac' /
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'induct_tac' (for HOL datatypes);
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* simplified (more robust) goal selection of proof methods: 1st goal,
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all goals, or explicit goal specifier (tactic emulation); thus 'proof
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method scripts' have to be in depth-first order;
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* tuned 'let' syntax: replace 'as' keyword by 'and';
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* theory command 'hide' removes declarations from class/type/const
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name spaces;
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*** HOL ***
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* HOL/Algebra: new theory of rings and univariate polynomials, by
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Clemens Ballarin;
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* HOL/record: fixed select-update simplification procedure to handle
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extended records as well; admit "r" as field name;
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* HOL/ex: new theory Factorization proving the Fundamental Theorem of
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Arithmetic, by Thomas M Rasmussen;
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* HOL/ex/Multiquote: multiple nested quotations and anti-quotations --
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basically a generalized version of de-Bruijn representation; very
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useful in avoiding lifting all operations;
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* HOL/Real: "rabs" replaced by overloaded "abs" function;
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* HOL: 0 is now overloaded over the new sort "zero", allowing its use with
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other numeric types and also as the identity of groups, rings, etc.;
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* HOL: new axclass plus_ac0 for addition with the AC-laws and 0 as identity.
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Types nat and int belong to this axclass;
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* greatly improved simplification involving numerals of type nat & int, e.g.
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   (i + #8 + j) = Suc k simplifies to  #7 + (i + j) = k
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   i*j + k + j*#3*i     simplifies to  #4*(i*j) + k
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  two terms #m*u and #n*u are replaced by #(m+n)*u
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    (where #m, #n and u can implicitly be 1; this is simproc combine_numerals)
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  and the term/formula #m*u+x ~~ #n*u+y simplifies simplifies to #(m-n)+x ~~ y
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    or x ~~ #(n-m)+y, where ~~ is one of = < <= or - (simproc cancel_numerals);
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* HOL: new version of "case_tac" subsumes both boolean case split and
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"exhaust_tac" on datatypes; INCOMPATIBILITY: exhaust_tac no longer
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exists, may define val exhaust_tac = case_tac for ad-hoc portability;
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* HOL: simplification no longer dives into case-expressions: only the
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   164
selector expression is simplified, but not the remaining arms. To
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   165
enable full simplification of case-expressions for datatype t, you
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need to remove t.weak_case_cong from the simpset, either permanently
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(Delcongs[thm"t.weak_case_cong"];) or locally (delcongs [...]).
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* HOL/recdef: the recursion equations generated by 'recdef' for
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function 'f' are now called f.simps instead of f.rules; if all
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termination conditions are proved automatically, these simplification
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rules are added to the simpset, as in primrec; rules may be named
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   173
individually as well, resulting in a separate list of theorems for
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each equation;
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* HOL: new (overloaded) notation for the set of elements below/above some
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element: {..u}, {..u(}, {l..}, {)l..}. See theory SetInterval.
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* HOL: theorems impI, allI, ballI bound as "strip";
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   180
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   181
* theory Sexp now in HOL/Induct examples (used to be part of main HOL,
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   182
but was unused);
8626
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* fewer consts declared as global (e.g. have to refer to "Lfp.lfp"
c0c583ce0b0b * HOL/ML: even fewer consts are declared as global (see theories Ord,
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instead of "lfp" internally; affects ML packages only);
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   186
8412
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8358
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*** General ***
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   189
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* improved name spaces: ambiguous output is qualified; support for
094dbd0fad0c * improved name spaces: ambiguous output is qualified; support for
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hiding of names;
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* compression of ML heaps images may now be controlled via -c option
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of isabelle and isatool usedir (currently only observed by Poly/ML);
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* ML: new combinators |>> and |>>> for incremental transformations
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   197
with secondary results (e.g. certain theory extensions):
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8015
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New in Isabelle99 (October 1999)
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--------------------------------
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*** Overview of INCOMPATIBILITIES (see below for more details) ***
325300576da7 Finally removing "Compl" from HOL
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* HOL: The THEN and ELSE parts of conditional expressions (if P then x else y)
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are no longer simplified.  (This allows the simplifier to unfold recursive
f5c5b81b3f14 integer division
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functional programs.)  To restore the old behaviour, declare
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   209
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   210
    Delcongs [if_weak_cong];
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6269
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* HOL: Removed the obsolete syntax "Compl A"; use -A for set
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complement;
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6269
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* HOL: the predicate "inj" is now defined by translation to "inj_on";
6174
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   216
7847
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* HOL/datatype: mutual_induct_tac no longer exists --
5a3fa0c4b215 Eliminated mutual_induct_tac.
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   218
  use induct_tac "x_1 ... x_n" instead of mutual_induct_tac ["x_1", ..., "x_n"]
5a3fa0c4b215 Eliminated mutual_induct_tac.
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6386
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* HOL/typedef: fixed type inference for representing set; type
e9e8af97f48f HOL/typedef: fixed type inference for representing set;
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   221
arguments now have to occur explicitly on the rhs as type constraints;
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6269
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* ZF: The con_defs part of an inductive definition may no longer refer
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diff changeset
   224
to constants declared in the same theory;
6057
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6269
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diff changeset
   226
* HOL, ZF: the function mk_cases, generated by the inductive
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diff changeset
   227
definition package, has lost an argument.  To simplify its result, it
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diff changeset
   228
uses the default simpset instead of a supplied list of theorems.
6141
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   229
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* HOL/List: the constructors of type list are now Nil and Cons;
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diff changeset
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* Simplifier: the type of the infix ML functions
8729
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        setSSolver addSSolver setSolver addSolver
7619
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   234
is now  simpset * solver -> simpset  where `solver' is a new abstract type
d78b8b103fd9 incompatibility solver
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diff changeset
   235
for packaging solvers. A solver is created via
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094dbd0fad0c * improved name spaces: ambiguous output is qualified; support for
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   236
        mk_solver: string -> (thm list -> int -> tactic) -> solver
7619
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   237
where the string argument is only a comment.
6057
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7647
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diff changeset
   239
6069
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   240
*** Proof tools ***
a99879bd9f13 if-then-else syntax for ZF
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diff changeset
   241
6343
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diff changeset
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* Provers/Arith/fast_lin_arith.ML contains a functor for creating a
97c697a32b73 updated;
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decision procedure for linear arithmetic. Currently it is used for
7593
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diff changeset
   244
types `nat', `int', and `real' in HOL (see below); it can, should and
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diff changeset
   245
will be instantiated for other types and logics as well.
6069
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diff changeset
   246
7324
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   247
* The simplifier now accepts rewrite rules with flexible heads, eg
6cb0d0202298 simplifier flex heads.
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     hom ?f ==> ?f(?x+?y) = ?f ?x + ?f ?y
6cb0d0202298 simplifier flex heads.
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  They are applied like any rule with a non-pattern lhs, i.e. by first-order
6cb0d0202298 simplifier flex heads.
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  matching.
6069
a99879bd9f13 if-then-else syntax for ZF
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6014
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*** General ***
bfd4923b0957 locales
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7986
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diff changeset
   255
* New Isabelle/Isar subsystem provides an alternative to traditional
7215
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   256
tactical theorem proving; together with the ProofGeneral/isar user
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   257
interface it offers an interactive environment for developing human
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diff changeset
   258
readable proof documents (Isar == Intelligible semi-automated
7886
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diff changeset
   259
reasoning); for further information see isatool doc isar-ref,
7986
9d319a76dbeb Isabelle99;
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src/HOL/Isar_examples and http://isabelle.in.tum.de/Isar/
7886
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diff changeset
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8fa551e22e52 the settings environment is now statically scoped;
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diff changeset
   262
* improved presentation of theories: better HTML markup (including
8fa551e22e52 the settings environment is now statically scoped;
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diff changeset
   263
colors), graph views in several sizes; isatool usedir now provides a
8fa551e22e52 the settings environment is now statically scoped;
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diff changeset
   264
proper interface for user theories (via -P option); actual document
8fa551e22e52 the settings environment is now statically scoped;
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diff changeset
   265
preparation based on (PDF)LaTeX is available as well (for new-style
8fa551e22e52 the settings environment is now statically scoped;
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   266
theories only); see isatool doc system for more information;
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7252
d3ed595dd772 replaced 'ProofGeneral' by 'Proof General';
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   268
* native support for Proof General, both for classic Isabelle and
7986
9d319a76dbeb Isabelle99;
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diff changeset
   269
Isabelle/Isar;
7215
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7791
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   271
* ML function thm_deps visualizes dependencies of theorems and lemmas,
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   272
using the graph browser tool;
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   273
6751
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* Isabelle manuals now also available as PDF;
0e346c73828c Isabelle manuals now also available as PDF;
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6449
d031cb5ea2fc loadpath replaced;
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* theory loader rewritten from scratch (may not be fully
d031cb5ea2fc loadpath replaced;
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bug-compatible); old loadpath variable has been replaced by show_path,
6671
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   278
add_path, del_path, reset_path functions; new operations such as
7593
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   279
update_thy, touch_thy, remove_thy, use/update_thy_only (see also
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isatool doc ref);
6449
d031cb5ea2fc loadpath replaced;
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7215
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* improved isatool install: option -k creates KDE application icon,
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   283
option -p DIR installs standalone binaries;
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diff changeset
   285
* added ML_PLATFORM setting (useful for cross-platform installations);
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   286
more robust handling of platform specific ML images for SML/NJ;
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7886
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diff changeset
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* the settings environment is now statically scoped, i.e. it is never
7986
9d319a76dbeb Isabelle99;
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   289
created again in sub-processes invoked from isabelle, isatool, or
7886
8fa551e22e52 the settings environment is now statically scoped;
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Isabelle;
8fa551e22e52 the settings environment is now statically scoped;
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7215
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   292
* path element specification '~~' refers to '$ISABELLE_HOME';
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6343
97c697a32b73 updated;
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   294
* in locales, the "assumes" and "defines" parts may be omitted if
97c697a32b73 updated;
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   295
empty;
5973
040f6d2af50d removed prs / prs_fn;
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6269
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   297
* new print_mode "xsymbols" for extended symbol support (e.g. genuine
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   298
long arrows);
6259
488bdc1bd11a path element specification '~~' refers to '$ISABELLE_HOME';
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6343
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* new print_mode "HTML";
97c697a32b73 updated;
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97c697a32b73 updated;
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   302
* new flag show_tags controls display of tags of theorems (which are
97c697a32b73 updated;
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   303
basically just comments that may be attached by some tools);
97c697a32b73 updated;
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   304
6461
99c34e50a2c6 Isamode 2.6 requires patch;
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diff changeset
   305
* Isamode 2.6 requires patch to accomodate change of Isabelle font
99c34e50a2c6 Isamode 2.6 requires patch;
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diff changeset
   306
mode and goal output format:
99c34e50a2c6 Isamode 2.6 requires patch;
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   307
99c34e50a2c6 Isamode 2.6 requires patch;
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   308
diff -r Isamode-2.6/elisp/isa-load.el Isamode/elisp/isa-load.el
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diff changeset
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244c244
99c34e50a2c6 Isamode 2.6 requires patch;
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<       (list (isa-getenv "ISABELLE") "-msymbols" logic-name)
99c34e50a2c6 Isamode 2.6 requires patch;
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   311
---
6533
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>       (list (isa-getenv "ISABELLE") "-misabelle_font" "-msymbols" logic-name)
6461
99c34e50a2c6 Isamode 2.6 requires patch;
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diff -r Isabelle-2.6/elisp/isa-proofstate.el Isamode/elisp/isa-proofstate.el
99c34e50a2c6 Isamode 2.6 requires patch;
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181c181
99c34e50a2c6 Isamode 2.6 requires patch;
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diff changeset
   315
< (defconst proofstate-proofstart-regexp "^Level [0-9]+$"
99c34e50a2c6 Isamode 2.6 requires patch;
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diff changeset
   316
---
99c34e50a2c6 Isamode 2.6 requires patch;
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   317
> (defconst proofstate-proofstart-regexp "^Level [0-9]+"
99c34e50a2c6 Isamode 2.6 requires patch;
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   318
7450
e329ca03fd00 added bind_thms;
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   319
* function bind_thms stores lists of theorems (cf. bind_thm);
e329ca03fd00 added bind_thms;
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   320
7593
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diff changeset
   321
* new shorthand tactics ftac, eatac, datac, fatac;
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diff changeset
   322
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diff changeset
   323
* qed (and friends) now accept "" as result name; in that case the
7986
9d319a76dbeb Isabelle99;
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diff changeset
   324
theorem is not stored, but proper checks and presentation of the
9d319a76dbeb Isabelle99;
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diff changeset
   325
result still apply;
7593
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diff changeset
   326
7805
0ae9ddc36fe0 theorem database now also indexes constants "Trueprop", "all",
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   327
* theorem database now also indexes constants "Trueprop", "all",
0ae9ddc36fe0 theorem database now also indexes constants "Trueprop", "all",
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   328
"==>", "=="; thus thms_containing, findI etc. may retrieve more rules;
0ae9ddc36fe0 theorem database now also indexes constants "Trueprop", "all",
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   329
6028
1bfd52528bde *** empty log message ***
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6057
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*** HOL ***
395ea7617554 *** empty log message ***
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   332
7215
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diff changeset
   333
** HOL arithmetic **
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diff changeset
   334
6343
97c697a32b73 updated;
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diff changeset
   335
* There are now decision procedures for linear arithmetic over nat and
97c697a32b73 updated;
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diff changeset
   336
int:
6131
2d9e609abcdb More Arith.
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diff changeset
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6343
97c697a32b73 updated;
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diff changeset
   338
1. arith_tac copes with arbitrary formulae involving `=', `<', `<=',
97c697a32b73 updated;
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diff changeset
   339
`+', `-', `Suc', `min', `max' and numerical constants; other subterms
97c697a32b73 updated;
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diff changeset
   340
are treated as atomic; subformulae not involving type `nat' or `int'
97c697a32b73 updated;
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diff changeset
   341
are ignored; quantified subformulae are ignored unless they are
97c697a32b73 updated;
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diff changeset
   342
positive universal or negative existential. The tactic has to be
97c697a32b73 updated;
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diff changeset
   343
invoked by hand and can be a little bit slow. In particular, the
97c697a32b73 updated;
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diff changeset
   344
running time is exponential in the number of occurrences of `min' and
97c697a32b73 updated;
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   345
`max', and `-' on `nat'.
6131
2d9e609abcdb More Arith.
nipkow
parents: 6070
diff changeset
   346
6343
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   347
2. fast_arith_tac is a cut-down version of arith_tac: it only takes
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   348
(negated) (in)equalities among the premises and the conclusion into
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   349
account (i.e. no compound formulae) and does not know about `min' and
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   350
`max', and `-' on `nat'. It is fast and is used automatically by the
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   351
simplifier.
6131
2d9e609abcdb More Arith.
nipkow
parents: 6070
diff changeset
   352
6343
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   353
NB: At the moment, these decision procedures do not cope with mixed
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   354
nat/int formulae where the two parts interact, such as `m < n ==>
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   355
int(m) < int(n)'.
6028
1bfd52528bde *** empty log message ***
oheimb
parents: 6014
diff changeset
   356
7215
wenzelm
parents: 7204
diff changeset
   357
* HOL/Numeral provides a generic theory of numerals (encoded
7313
300487ddfba9 real numerals;
wenzelm
parents: 7300
diff changeset
   358
efficiently as bit strings); setup for types nat/int/real is in place;
7215
wenzelm
parents: 7204
diff changeset
   359
INCOMPATIBILITY: since numeral syntax is now polymorphic, rather than
wenzelm
parents: 7204
diff changeset
   360
int, existing theories and proof scripts may require a few additional
wenzelm
parents: 7204
diff changeset
   361
type constraints;
wenzelm
parents: 7204
diff changeset
   362
wenzelm
parents: 7204
diff changeset
   363
* integer division and remainder can now be performed on constant
wenzelm
parents: 7204
diff changeset
   364
arguments;
7157
paulson
parents: 7125
diff changeset
   365
7215
wenzelm
parents: 7204
diff changeset
   366
* many properties of integer multiplication, division and remainder
wenzelm
parents: 7204
diff changeset
   367
are now available;
6922
f5c5b81b3f14 integer division
paulson
parents: 6795
diff changeset
   368
7287
d603a06b30df defer_recdef
paulson
parents: 7280
diff changeset
   369
* An interface to the Stanford Validity Checker (SVC) is available through the
d603a06b30df defer_recdef
paulson
parents: 7280
diff changeset
   370
tactic svc_tac.  Propositional tautologies and theorems of linear arithmetic
d603a06b30df defer_recdef
paulson
parents: 7280
diff changeset
   371
are proved automatically.  SVC must be installed separately, and its results
d603a06b30df defer_recdef
paulson
parents: 7280
diff changeset
   372
must be TAKEN ON TRUST (Isabelle does not check the proofs, but tags any
d603a06b30df defer_recdef
paulson
parents: 7280
diff changeset
   373
invocation of the underlying oracle).  For SVC see
7444
ee17ad649c26 new SVC url
paulson
parents: 7420
diff changeset
   374
  http://verify.stanford.edu/SVC
6922
f5c5b81b3f14 integer division
paulson
parents: 6795
diff changeset
   375
7125
df7cf6e85501 HOL-Real target now builds an actual image;
wenzelm
parents: 7113
diff changeset
   376
* IsaMakefile: the HOL-Real target now builds an actual image;
df7cf6e85501 HOL-Real target now builds an actual image;
wenzelm
parents: 7113
diff changeset
   377
7215
wenzelm
parents: 7204
diff changeset
   378
wenzelm
parents: 7204
diff changeset
   379
** HOL misc **
wenzelm
parents: 7204
diff changeset
   380
7595
5f5d575ddac3 * HOL/Real/HahnBanach: the Hahn-Banach theorem for real vector spaces
wenzelm
parents: 7593
diff changeset
   381
* HOL/Real/HahnBanach: the Hahn-Banach theorem for real vector spaces
5f5d575ddac3 * HOL/Real/HahnBanach: the Hahn-Banach theorem for real vector spaces
wenzelm
parents: 7593
diff changeset
   382
(in Isabelle/Isar) -- by Gertrud Bauer;
5f5d575ddac3 * HOL/Real/HahnBanach: the Hahn-Banach theorem for real vector spaces
wenzelm
parents: 7593
diff changeset
   383
7691
b7e8277fa088 added BVC;
wenzelm
parents: 7647
diff changeset
   384
* HOL/BCV: generic model of bytecode verification, i.e. data-flow
b7e8277fa088 added BVC;
wenzelm
parents: 7647
diff changeset
   385
analysis for assembly languages with subtypes;
b7e8277fa088 added BVC;
wenzelm
parents: 7647
diff changeset
   386
6278
37b76155a49e Symbol.output subject to print mode;
wenzelm
parents: 6269
diff changeset
   387
* HOL/TLA (Lamport's Temporal Logic of Actions): major reorganization
37b76155a49e Symbol.output subject to print mode;
wenzelm
parents: 6269
diff changeset
   388
-- avoids syntactic ambiguities and treats state, transition, and
37b76155a49e Symbol.output subject to print mode;
wenzelm
parents: 6269
diff changeset
   389
temporal levels more uniformly; introduces INCOMPATIBILITIES due to
37b76155a49e Symbol.output subject to print mode;
wenzelm
parents: 6269
diff changeset
   390
changed syntax and (many) tactics;
37b76155a49e Symbol.output subject to print mode;
wenzelm
parents: 6269
diff changeset
   391
7791
wenzelm
parents: 7780
diff changeset
   392
* HOL/inductive: Now also handles more general introduction rules such
wenzelm
parents: 7780
diff changeset
   393
  as "ALL y. (y, x) : r --> y : acc r ==> x : acc r"; monotonicity
wenzelm
parents: 7780
diff changeset
   394
  theorems are now maintained within the theory (maintained via the
wenzelm
parents: 7780
diff changeset
   395
  "mono" attribute);
7780
099742c562aa Documented changes to HOL/inductive and function thm_deps.
berghofe
parents: 7691
diff changeset
   396
7238
36e58620ffc8 replaced HOL_quantifiers flag by "HOL" print mode;
wenzelm
parents: 7216
diff changeset
   397
* HOL/datatype: Now also handles arbitrarily branching datatypes
36e58620ffc8 replaced HOL_quantifiers flag by "HOL" print mode;
wenzelm
parents: 7216
diff changeset
   398
  (using function types) such as
36e58620ffc8 replaced HOL_quantifiers flag by "HOL" print mode;
wenzelm
parents: 7216
diff changeset
   399
36e58620ffc8 replaced HOL_quantifiers flag by "HOL" print mode;
wenzelm
parents: 7216
diff changeset
   400
  datatype 'a tree = Atom 'a | Branch "nat => 'a tree"
7047
d103b875ef1d Datatype package now handles arbitrarily branching datatypes.
berghofe
parents: 6925
diff changeset
   401
7326
a1555491a966 record_simproc;
wenzelm
parents: 7324
diff changeset
   402
* HOL/record: record_simproc (part of the default simpset) takes care
a1555491a966 record_simproc;
wenzelm
parents: 7324
diff changeset
   403
of selectors applied to updated records; record_split_tac is no longer
7327
wenzelm
parents: 7326
diff changeset
   404
part of the default claset; update_defs may now be removed from the
wenzelm
parents: 7326
diff changeset
   405
simpset in many cases; COMPATIBILITY: old behavior achieved by
7326
a1555491a966 record_simproc;
wenzelm
parents: 7324
diff changeset
   406
a1555491a966 record_simproc;
wenzelm
parents: 7324
diff changeset
   407
  claset_ref () := claset() addSWrapper record_split_wrapper;
a1555491a966 record_simproc;
wenzelm
parents: 7324
diff changeset
   408
  Delsimprocs [record_simproc]
a1555491a966 record_simproc;
wenzelm
parents: 7324
diff changeset
   409
6386
e9e8af97f48f HOL/typedef: fixed type inference for representing set;
wenzelm
parents: 6343
diff changeset
   410
* HOL/typedef: fixed type inference for representing set; type
e9e8af97f48f HOL/typedef: fixed type inference for representing set;
wenzelm
parents: 6343
diff changeset
   411
arguments now have to occur explicitly on the rhs as type constraints;
e9e8af97f48f HOL/typedef: fixed type inference for representing set;
wenzelm
parents: 6343
diff changeset
   412
7287
d603a06b30df defer_recdef
paulson
parents: 7280
diff changeset
   413
* HOL/recdef (TFL): 'congs' syntax now expects comma separated list of theorem
d603a06b30df defer_recdef
paulson
parents: 7280
diff changeset
   414
names rather than an ML expression;
d603a06b30df defer_recdef
paulson
parents: 7280
diff changeset
   415
d603a06b30df defer_recdef
paulson
parents: 7280
diff changeset
   416
* HOL/defer_recdef (TFL): like recdef but the well-founded relation can be
d603a06b30df defer_recdef
paulson
parents: 7280
diff changeset
   417
supplied later.  Program schemes can be defined, such as
d603a06b30df defer_recdef
paulson
parents: 7280
diff changeset
   418
    "While B C s = (if B s then While B C (C s) else s)"
d603a06b30df defer_recdef
paulson
parents: 7280
diff changeset
   419
where the well-founded relation can be chosen after B and C have been given.
6563
wenzelm
parents: 6533
diff changeset
   420
7215
wenzelm
parents: 7204
diff changeset
   421
* HOL/List: the constructors of type list are now Nil and Cons;
wenzelm
parents: 7204
diff changeset
   422
INCOMPATIBILITY: while [] and infix # syntax is still there, of
wenzelm
parents: 7204
diff changeset
   423
course, ML tools referring to List.list.op # etc. have to be adapted;
wenzelm
parents: 7204
diff changeset
   424
7238
36e58620ffc8 replaced HOL_quantifiers flag by "HOL" print mode;
wenzelm
parents: 7216
diff changeset
   425
* HOL_quantifiers flag superseded by "HOL" print mode, which is
36e58620ffc8 replaced HOL_quantifiers flag by "HOL" print mode;
wenzelm
parents: 7216
diff changeset
   426
disabled by default; run isabelle with option -m HOL to get back to
36e58620ffc8 replaced HOL_quantifiers flag by "HOL" print mode;
wenzelm
parents: 7216
diff changeset
   427
the original Gordon/HOL-style output;
36e58620ffc8 replaced HOL_quantifiers flag by "HOL" print mode;
wenzelm
parents: 7216
diff changeset
   428
36e58620ffc8 replaced HOL_quantifiers flag by "HOL" print mode;
wenzelm
parents: 7216
diff changeset
   429
* HOL/Ord.thy: new bounded quantifier syntax (input only): ALL x<y. P,
36e58620ffc8 replaced HOL_quantifiers flag by "HOL" print mode;
wenzelm
parents: 7216
diff changeset
   430
ALL x<=y. P, EX x<y. P, EX x<=y. P;
36e58620ffc8 replaced HOL_quantifiers flag by "HOL" print mode;
wenzelm
parents: 7216
diff changeset
   431
36e58620ffc8 replaced HOL_quantifiers flag by "HOL" print mode;
wenzelm
parents: 7216
diff changeset
   432
* HOL basic syntax simplified (more orthogonal): all variants of
36e58620ffc8 replaced HOL_quantifiers flag by "HOL" print mode;
wenzelm
parents: 7216
diff changeset
   433
All/Ex now support plain / symbolic / HOL notation; plain syntax for
36e58620ffc8 replaced HOL_quantifiers flag by "HOL" print mode;
wenzelm
parents: 7216
diff changeset
   434
Eps operator is provided as well: "SOME x. P[x]";
36e58620ffc8 replaced HOL_quantifiers flag by "HOL" print mode;
wenzelm
parents: 7216
diff changeset
   435
7320
e89fd7d0a624 Moved sum_case to theory HOL/Datatype.
berghofe
parents: 7313
diff changeset
   436
* HOL/Sum.thy: sum_case has been moved to HOL/Datatype;
7261
a141985d660b sum_case renamed to basic_sum_case;
wenzelm
parents: 7252
diff changeset
   437
7280
wenzelm
parents: 7261
diff changeset
   438
* HOL/Univ.thy: infix syntax <*>, <+>, <**>, <+> eliminated and made
wenzelm
parents: 7261
diff changeset
   439
thus available for user theories;
wenzelm
parents: 7261
diff changeset
   440
7300
8439bf404c28 * HOLCF/IOA/Sequents: renamed 'Cons' to 'Consq' to avoid clash with HOL/List;
wenzelm
parents: 7287
diff changeset
   441
* HOLCF/IOA/Sequents: renamed 'Cons' to 'Consq' to avoid clash with
8439bf404c28 * HOLCF/IOA/Sequents: renamed 'Cons' to 'Consq' to avoid clash with HOL/List;
wenzelm
parents: 7287
diff changeset
   442
HOL/List; hardly an INCOMPATIBILITY since '>>' syntax is used all the
8439bf404c28 * HOLCF/IOA/Sequents: renamed 'Cons' to 'Consq' to avoid clash with HOL/List;
wenzelm
parents: 7287
diff changeset
   443
time;
8439bf404c28 * HOLCF/IOA/Sequents: renamed 'Cons' to 'Consq' to avoid clash with HOL/List;
wenzelm
parents: 7287
diff changeset
   444
7986
9d319a76dbeb Isabelle99;
wenzelm
parents: 7919
diff changeset
   445
* HOL: new tactic smp_tac: int -> int -> tactic, which applies spec
9d319a76dbeb Isabelle99;
wenzelm
parents: 7919
diff changeset
   446
several times and then mp;
7492
44b333fb5b80 *** empty log message ***
oheimb
parents: 7450
diff changeset
   447
7215
wenzelm
parents: 7204
diff changeset
   448
7113
paulson
parents: 7047
diff changeset
   449
*** LK ***
paulson
parents: 7047
diff changeset
   450
7215
wenzelm
parents: 7204
diff changeset
   451
* the notation <<...>> is now available as a notation for sequences of
wenzelm
parents: 7204
diff changeset
   452
formulas;
7113
paulson
parents: 7047
diff changeset
   453
paulson
parents: 7047
diff changeset
   454
* the simplifier is now installed
paulson
parents: 7047
diff changeset
   455
8729
094dbd0fad0c * improved name spaces: ambiguous output is qualified; support for
wenzelm
parents: 8705
diff changeset
   456
* the axiom system has been generalized (thanks to Soren Heilmann)
7113
paulson
parents: 7047
diff changeset
   457
paulson
parents: 7047
diff changeset
   458
* the classical reasoner now has a default rule database
paulson
parents: 7047
diff changeset
   459
paulson
parents: 7047
diff changeset
   460
6064
0786b5afd8ee primrec, induct_tac
paulson
parents: 6063
diff changeset
   461
*** ZF ***
0786b5afd8ee primrec, induct_tac
paulson
parents: 6063
diff changeset
   462
0786b5afd8ee primrec, induct_tac
paulson
parents: 6063
diff changeset
   463
* new primrec section allows primitive recursive functions to be given
6269
wenzelm
parents: 6259
diff changeset
   464
directly (as in HOL) over datatypes and the natural numbers;
6064
0786b5afd8ee primrec, induct_tac
paulson
parents: 6063
diff changeset
   465
6269
wenzelm
parents: 6259
diff changeset
   466
* new tactics induct_tac and exhaust_tac for induction (or case
wenzelm
parents: 6259
diff changeset
   467
analysis) over datatypes and the natural numbers;
6064
0786b5afd8ee primrec, induct_tac
paulson
parents: 6063
diff changeset
   468
0786b5afd8ee primrec, induct_tac
paulson
parents: 6063
diff changeset
   469
* the datatype declaration of type T now defines the recursor T_rec;
0786b5afd8ee primrec, induct_tac
paulson
parents: 6063
diff changeset
   470
6141
a6922171b396 removal of the (thm list) argument of mk_cases
paulson
parents: 6131
diff changeset
   471
* simplification automatically does freeness reasoning for datatype
6269
wenzelm
parents: 6259
diff changeset
   472
constructors;
6141
a6922171b396 removal of the (thm list) argument of mk_cases
paulson
parents: 6131
diff changeset
   473
6269
wenzelm
parents: 6259
diff changeset
   474
* automatic type-inference, with AddTCs command to insert new
wenzelm
parents: 6259
diff changeset
   475
type-checking rules;
6155
e387d188d0ca ZF typechecking
paulson
parents: 6141
diff changeset
   476
6269
wenzelm
parents: 6259
diff changeset
   477
* datatype introduction rules are now added as Safe Introduction rules
wenzelm
parents: 6259
diff changeset
   478
to the claset;
6155
e387d188d0ca ZF typechecking
paulson
parents: 6141
diff changeset
   479
6269
wenzelm
parents: 6259
diff changeset
   480
* the syntax "if P then x else y" is now available in addition to
wenzelm
parents: 6259
diff changeset
   481
if(P,x,y);
wenzelm
parents: 6259
diff changeset
   482
6069
a99879bd9f13 if-then-else syntax for ZF
paulson
parents: 6064
diff changeset
   483
6343
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   484
*** Internal programming interfaces ***
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   485
7919
35c18affc1d8 tuned simplifier trace output; new flag debug_simp
wenzelm
parents: 7886
diff changeset
   486
* tuned simplifier trace output; new flag debug_simp;
35c18affc1d8 tuned simplifier trace output; new flag debug_simp
wenzelm
parents: 7886
diff changeset
   487
7420
cba45c114f3b structures Vartab / Termtab (instances of TableFun);
wenzelm
parents: 7327
diff changeset
   488
* structures Vartab / Termtab (instances of TableFun) offer efficient
cba45c114f3b structures Vartab / Termtab (instances of TableFun);
wenzelm
parents: 7327
diff changeset
   489
tables indexed by indexname_ord / term_ord (compatible with aconv);
cba45c114f3b structures Vartab / Termtab (instances of TableFun);
wenzelm
parents: 7327
diff changeset
   490
6386
e9e8af97f48f HOL/typedef: fixed type inference for representing set;
wenzelm
parents: 6343
diff changeset
   491
* AxClass.axclass_tac lost the theory argument;
e9e8af97f48f HOL/typedef: fixed type inference for representing set;
wenzelm
parents: 6343
diff changeset
   492
6343
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   493
* tuned current_goals_markers semantics: begin / end goal avoids
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   494
printing empty lines;
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   495
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   496
* removed prs and prs_fn hook, which was broken because it did not
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   497
include \n in its semantics, forcing writeln to add one
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   498
uncoditionally; replaced prs_fn by writeln_fn; consider std_output:
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   499
string -> unit if you really want to output text without newline;
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   500
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   501
* Symbol.output subject to print mode; INCOMPATIBILITY: defaults to
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   502
plain output, interface builders may have to enable 'isabelle_font'
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   503
mode to get Isabelle font glyphs as before;
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   504
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   505
* refined token_translation interface; INCOMPATIBILITY: output length
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   506
now of type real instead of int;
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   507
7196
c8d1002060e8 theory loader actions;
wenzelm
parents: 7157
diff changeset
   508
* theory loader actions may be traced via new ThyInfo.add_hook
c8d1002060e8 theory loader actions;
wenzelm
parents: 7157
diff changeset
   509
interface (see src/Pure/Thy/thy_info.ML); example application: keep
c8d1002060e8 theory loader actions;
wenzelm
parents: 7157
diff changeset
   510
your own database of information attached to *whole* theories -- as
c8d1002060e8 theory loader actions;
wenzelm
parents: 7157
diff changeset
   511
opposed to intra-theory data slots offered via TheoryDataFun;
c8d1002060e8 theory loader actions;
wenzelm
parents: 7157
diff changeset
   512
7647
2ceddd91cd0a proper handling of dangling sort hypotheses (at last!);
wenzelm
parents: 7619
diff changeset
   513
* proper handling of dangling sort hypotheses (at last!);
2ceddd91cd0a proper handling of dangling sort hypotheses (at last!);
wenzelm
parents: 7619
diff changeset
   514
Thm.strip_shyps and Drule.strip_shyps_warning take care of removing
2ceddd91cd0a proper handling of dangling sort hypotheses (at last!);
wenzelm
parents: 7619
diff changeset
   515
extra sort hypotheses that can be witnessed from the type signature;
7986
9d319a76dbeb Isabelle99;
wenzelm
parents: 7919
diff changeset
   516
the force_strip_shyps flag is gone, any remaining shyps are simply
9d319a76dbeb Isabelle99;
wenzelm
parents: 7919
diff changeset
   517
left in the theorem (with a warning issued by strip_shyps_warning);
7647
2ceddd91cd0a proper handling of dangling sort hypotheses (at last!);
wenzelm
parents: 7619
diff changeset
   518
6343
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   519
6064
0786b5afd8ee primrec, induct_tac
paulson
parents: 6063
diff changeset
   520
5781
d37380544c39 tuned current_goals_markers;
wenzelm
parents: 5731
diff changeset
   521
New in Isabelle98-1 (October 1998)
d37380544c39 tuned current_goals_markers;
wenzelm
parents: 5731
diff changeset
   522
----------------------------------
d37380544c39 tuned current_goals_markers;
wenzelm
parents: 5731
diff changeset
   523
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   524
*** Overview of INCOMPATIBILITIES (see below for more details) ***
4842
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
   525
5726
wenzelm
parents: 5722
diff changeset
   526
* several changes of automated proof tools;
5373
wenzelm
parents: 5363
diff changeset
   527
5726
wenzelm
parents: 5722
diff changeset
   528
* HOL: major changes to the inductive and datatype packages, including
wenzelm
parents: 5722
diff changeset
   529
some minor incompatibilities of theory syntax;
5214
75c6392d1274 Adapted to new datatype package.
berghofe
parents: 5207
diff changeset
   530
5726
wenzelm
parents: 5722
diff changeset
   531
* HOL: renamed r^-1 to 'converse' from 'inverse'; 'inj_onto' is now
5217
wenzelm
parents: 5214
diff changeset
   532
called `inj_on';
5160
1ff6679144b9 ZF: Main, Update
paulson
parents: 5145
diff changeset
   533
5275
de5d5e5eb692 *** empty log message ***
nipkow
parents: 5267
diff changeset
   534
* HOL: removed duplicate thms in Arith:
de5d5e5eb692 *** empty log message ***
nipkow
parents: 5267
diff changeset
   535
  less_imp_add_less  should be replaced by  trans_less_add1
de5d5e5eb692 *** empty log message ***
nipkow
parents: 5267
diff changeset
   536
  le_imp_add_le      should be replaced by  trans_le_add1
5160
1ff6679144b9 ZF: Main, Update
paulson
parents: 5145
diff changeset
   537
5726
wenzelm
parents: 5722
diff changeset
   538
* HOL: unary minus is now overloaded (new type constraints may be
wenzelm
parents: 5722
diff changeset
   539
required);
5490
85855f65d0c6 From Compl(A) to -A
paulson
parents: 5475
diff changeset
   540
5726
wenzelm
parents: 5722
diff changeset
   541
* HOL and ZF: unary minus for integers is now #- instead of #~.  In
wenzelm
parents: 5722
diff changeset
   542
ZF, expressions such as n#-1 must be changed to n#- 1, since #-1 is
wenzelm
parents: 5722
diff changeset
   543
now taken as an integer constant.
5541
f8fb27db4bcd unary minus
paulson
parents: 5526
diff changeset
   544
5726
wenzelm
parents: 5722
diff changeset
   545
* Pure: ML function 'theory_of' renamed to 'theory';
5397
034ed25535b9 * Pure: ML function 'theory_of' replaced by 'theory';
wenzelm
parents: 5373
diff changeset
   546
5363
0cf15843b82f isatool install;
wenzelm
parents: 5332
diff changeset
   547
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   548
*** Proof tools ***
4880
312115d20c45 *** empty log message ***
nipkow
parents: 4879
diff changeset
   549
5657
1a6c9c6a3f8e 2. The simplifier now knows a little bit about nat-arithmetic.
nipkow
parents: 5651
diff changeset
   550
* Simplifier:
1a6c9c6a3f8e 2. The simplifier now knows a little bit about nat-arithmetic.
nipkow
parents: 5651
diff changeset
   551
  1. Asm_full_simp_tac is now more aggressive.
1a6c9c6a3f8e 2. The simplifier now knows a little bit about nat-arithmetic.
nipkow
parents: 5651
diff changeset
   552
     1. It will sometimes reorient premises if that increases their power to
1a6c9c6a3f8e 2. The simplifier now knows a little bit about nat-arithmetic.
nipkow
parents: 5651
diff changeset
   553
        simplify.
1a6c9c6a3f8e 2. The simplifier now knows a little bit about nat-arithmetic.
nipkow
parents: 5651
diff changeset
   554
     2. It does no longer proceed strictly from left to right but may also
1a6c9c6a3f8e 2. The simplifier now knows a little bit about nat-arithmetic.
nipkow
parents: 5651
diff changeset
   555
        rotate premises to achieve further simplification.
1a6c9c6a3f8e 2. The simplifier now knows a little bit about nat-arithmetic.
nipkow
parents: 5651
diff changeset
   556
     For compatibility reasons there is now Asm_lr_simp_tac which is like the
1a6c9c6a3f8e 2. The simplifier now knows a little bit about nat-arithmetic.
nipkow
parents: 5651
diff changeset
   557
     old Asm_full_simp_tac in that it does not rotate premises.
1a6c9c6a3f8e 2. The simplifier now knows a little bit about nat-arithmetic.
nipkow
parents: 5651
diff changeset
   558
  2. The simplifier now knows a little bit about nat-arithmetic.
4880
312115d20c45 *** empty log message ***
nipkow
parents: 4879
diff changeset
   559
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   560
* Classical reasoner: wrapper mechanism for the classical reasoner now
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   561
allows for selected deletion of wrappers, by introduction of names for
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   562
wrapper functionals.  This implies that addbefore, addSbefore,
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   563
addaltern, and addSaltern now take a pair (name, tactic) as argument,
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   564
and that adding two tactics with the same name overwrites the first
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   565
one (emitting a warning).
4824
df8fc4626a9e *** empty log message ***
oheimb
parents: 4806
diff changeset
   566
  type wrapper = (int -> tactic) -> (int -> tactic)
4649
89ad3eb863a1 changed wrapper mechanism of classical reasoner
oheimb
parents: 4575
diff changeset
   567
  setWrapper, setSWrapper, compWrapper and compSWrapper are replaced by
4824
df8fc4626a9e *** empty log message ***
oheimb
parents: 4806
diff changeset
   568
  addWrapper, addSWrapper: claset * (string * wrapper) -> claset
df8fc4626a9e *** empty log message ***
oheimb
parents: 4806
diff changeset
   569
  delWrapper, delSWrapper: claset *  string            -> claset
4649
89ad3eb863a1 changed wrapper mechanism of classical reasoner
oheimb
parents: 4575
diff changeset
   570
  getWrapper is renamed to appWrappers, getSWrapper to appSWrappers;
89ad3eb863a1 changed wrapper mechanism of classical reasoner
oheimb
parents: 4575
diff changeset
   571
5705
56f2030c46c6 tuned (all proofs are INSTABLE by David's definition of instability);
wenzelm
parents: 5671
diff changeset
   572
* Classical reasoner: addbefore/addSbefore now have APPEND/ORELSE
5726
wenzelm
parents: 5722
diff changeset
   573
semantics; addbefore now affects only the unsafe part of step_tac
wenzelm
parents: 5722
diff changeset
   574
etc.; this affects addss/auto_tac/force_tac, so EXISTING PROOFS MAY
wenzelm
parents: 5722
diff changeset
   575
FAIL, but proofs should be fixable easily, e.g. by replacing Auto_tac
wenzelm
parents: 5722
diff changeset
   576
by Force_tac;
5524
38f2a518a811 *** empty log message ***
oheimb
parents: 5490
diff changeset
   577
5726
wenzelm
parents: 5722
diff changeset
   578
* Classical reasoner: setwrapper to setWrapper and compwrapper to
wenzelm
parents: 5722
diff changeset
   579
compWrapper; added safe wrapper (and access functions for it);
5524
38f2a518a811 *** empty log message ***
oheimb
parents: 5490
diff changeset
   580
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   581
* HOL/split_all_tac is now much faster and fails if there is nothing
5726
wenzelm
parents: 5722
diff changeset
   582
to split.  Some EXISTING PROOFS MAY REQUIRE ADAPTION because the order
wenzelm
parents: 5722
diff changeset
   583
and the names of the automatically generated variables have changed.
wenzelm
parents: 5722
diff changeset
   584
split_all_tac has moved within claset() from unsafe wrappers to safe
wenzelm
parents: 5722
diff changeset
   585
wrappers, which means that !!-bound variables are split much more
wenzelm
parents: 5722
diff changeset
   586
aggressively, and safe_tac and clarify_tac now split such variables.
wenzelm
parents: 5722
diff changeset
   587
If this splitting is not appropriate, use delSWrapper "split_all_tac".
wenzelm
parents: 5722
diff changeset
   588
Note: the same holds for record_split_tac, which does the job of
wenzelm
parents: 5722
diff changeset
   589
split_all_tac for record fields.
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   590
5726
wenzelm
parents: 5722
diff changeset
   591
* HOL/Simplifier: Rewrite rules for case distinctions can now be added
wenzelm
parents: 5722
diff changeset
   592
permanently to the default simpset using Addsplits just like
wenzelm
parents: 5722
diff changeset
   593
Addsimps. They can be removed via Delsplits just like
wenzelm
parents: 5722
diff changeset
   594
Delsimps. Lower-case versions are also available.
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   595
5726
wenzelm
parents: 5722
diff changeset
   596
* HOL/Simplifier: The rule split_if is now part of the default
wenzelm
parents: 5722
diff changeset
   597
simpset. This means that the simplifier will eliminate all occurrences
wenzelm
parents: 5722
diff changeset
   598
of if-then-else in the conclusion of a goal. To prevent this, you can
wenzelm
parents: 5722
diff changeset
   599
either remove split_if completely from the default simpset by
wenzelm
parents: 5722
diff changeset
   600
`Delsplits [split_if]' or remove it in a specific call of the
wenzelm
parents: 5722
diff changeset
   601
simplifier using `... delsplits [split_if]'.  You can also add/delete
wenzelm
parents: 5722
diff changeset
   602
other case splitting rules to/from the default simpset: every datatype
wenzelm
parents: 5722
diff changeset
   603
generates suitable rules `split_t_case' and `split_t_case_asm' (where
wenzelm
parents: 5722
diff changeset
   604
t is the name of the datatype).
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   605
5726
wenzelm
parents: 5722
diff changeset
   606
* Classical reasoner / Simplifier combination: new force_tac (and
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   607
derivatives Force_tac, force) combines rewriting and classical
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   608
reasoning (and whatever other tools) similarly to auto_tac, but is
5726
wenzelm
parents: 5722
diff changeset
   609
aimed to solve the given subgoal completely.
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   610
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   611
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   612
*** General ***
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   613
5217
wenzelm
parents: 5214
diff changeset
   614
* new top-level commands `Goal' and `Goalw' that improve upon `goal'
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   615
and `goalw': the theory is no longer needed as an explicit argument -
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   616
the current theory context is used; assumptions are no longer returned
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   617
at the ML-level unless one of them starts with ==> or !!; it is
5217
wenzelm
parents: 5214
diff changeset
   618
recommended to convert to these new commands using isatool fixgoal
wenzelm
parents: 5214
diff changeset
   619
(backup your sources first!);
4842
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
   620
5217
wenzelm
parents: 5214
diff changeset
   621
* new top-level commands 'thm' and 'thms' for retrieving theorems from
5207
wenzelm
parents: 5160
diff changeset
   622
the current theory context, and 'theory' to lookup stored theories;
4806
79cc986bc4d7 bug fixes
paulson
parents: 4801
diff changeset
   623
5722
c669e2161b08 locales
paulson
parents: 5710
diff changeset
   624
* new theory section 'locale' for declaring constants, assumptions and
c669e2161b08 locales
paulson
parents: 5710
diff changeset
   625
definitions that have local scope;
c669e2161b08 locales
paulson
parents: 5710
diff changeset
   626
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   627
* new theory section 'nonterminals' for purely syntactic types;
4858
4b15e9e1b3a5 new theory section 'nonterminals';
wenzelm
parents: 4842
diff changeset
   628
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   629
* new theory section 'setup' for generic ML setup functions
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   630
(e.g. package initialization);
4869
f3d30c02c1db new theory section 'setup';
wenzelm
parents: 4858
diff changeset
   631
5131
dd4ac220b8b4 the distribution now includes Isabelle icons: see
wenzelm
parents: 5128
diff changeset
   632
* the distribution now includes Isabelle icons: see
dd4ac220b8b4 the distribution now includes Isabelle icons: see
wenzelm
parents: 5128
diff changeset
   633
lib/logo/isabelle-{small,tiny}.xpm;
dd4ac220b8b4 the distribution now includes Isabelle icons: see
wenzelm
parents: 5128
diff changeset
   634
5363
0cf15843b82f isatool install;
wenzelm
parents: 5332
diff changeset
   635
* isatool install - install binaries with absolute references to
0cf15843b82f isatool install;
wenzelm
parents: 5332
diff changeset
   636
ISABELLE_HOME/bin;
0cf15843b82f isatool install;
wenzelm
parents: 5332
diff changeset
   637
5572
53c6ea1e6d94 isatool logo;
wenzelm
parents: 5541
diff changeset
   638
* isatool logo -- create instances of the Isabelle logo (as EPS);
53c6ea1e6d94 isatool logo;
wenzelm
parents: 5541
diff changeset
   639
5407
b450fea6d70c * print mode 'emacs' reserved for Isamode;
wenzelm
parents: 5397
diff changeset
   640
* print mode 'emacs' reserved for Isamode;
b450fea6d70c * print mode 'emacs' reserved for Isamode;
wenzelm
parents: 5397
diff changeset
   641
5726
wenzelm
parents: 5722
diff changeset
   642
* support multiple print (ast) translations per constant name;
wenzelm
parents: 5722
diff changeset
   643
6925
8d4d45ec6a3d theorems involving oracles are now printed with a suffixed [!];
wenzelm
parents: 6922
diff changeset
   644
* theorems involving oracles are now printed with a suffixed [!];
8d4d45ec6a3d theorems involving oracles are now printed with a suffixed [!];
wenzelm
parents: 6922
diff changeset
   645
4711
75a9ef36b1fe removed pred;
wenzelm
parents: 4683
diff changeset
   646
4661
paulson
parents: 4655
diff changeset
   647
*** HOL ***
paulson
parents: 4655
diff changeset
   648
5710
wenzelm
parents: 5709
diff changeset
   649
* there is now a tutorial on Isabelle/HOL (do 'isatool doc tutorial');
5709
35b07f8e67b6 Tutorial
nipkow
parents: 5705
diff changeset
   650
5217
wenzelm
parents: 5214
diff changeset
   651
* HOL/inductive package reorganized and improved: now supports mutual
5267
41a01176b9de disjointness
paulson
parents: 5251
diff changeset
   652
definitions such as
5217
wenzelm
parents: 5214
diff changeset
   653
wenzelm
parents: 5214
diff changeset
   654
  inductive EVEN ODD
wenzelm
parents: 5214
diff changeset
   655
    intrs
wenzelm
parents: 5214
diff changeset
   656
      null "0 : EVEN"
wenzelm
parents: 5214
diff changeset
   657
      oddI "n : EVEN ==> Suc n : ODD"
wenzelm
parents: 5214
diff changeset
   658
      evenI "n : ODD ==> Suc n : EVEN"
wenzelm
parents: 5214
diff changeset
   659
wenzelm
parents: 5214
diff changeset
   660
new theorem list "elims" contains an elimination rule for each of the
wenzelm
parents: 5214
diff changeset
   661
recursive sets; inductive definitions now handle disjunctive premises
wenzelm
parents: 5214
diff changeset
   662
correctly (also ZF);
5214
75c6392d1274 Adapted to new datatype package.
berghofe
parents: 5207
diff changeset
   663
5217
wenzelm
parents: 5214
diff changeset
   664
INCOMPATIBILITIES: requires Inductive as an ancestor; component
wenzelm
parents: 5214
diff changeset
   665
"mutual_induct" no longer exists - the induction rule is always
wenzelm
parents: 5214
diff changeset
   666
contained in "induct";
wenzelm
parents: 5214
diff changeset
   667
wenzelm
parents: 5214
diff changeset
   668
wenzelm
parents: 5214
diff changeset
   669
* HOL/datatype package re-implemented and greatly improved: now
5267
41a01176b9de disjointness
paulson
parents: 5251
diff changeset
   670
supports mutually recursive datatypes such as
5217
wenzelm
parents: 5214
diff changeset
   671
wenzelm
parents: 5214
diff changeset
   672
  datatype
wenzelm
parents: 5214
diff changeset
   673
    'a aexp = IF_THEN_ELSE ('a bexp) ('a aexp) ('a aexp)
wenzelm
parents: 5214
diff changeset
   674
            | SUM ('a aexp) ('a aexp)
wenzelm
parents: 5214
diff changeset
   675
            | DIFF ('a aexp) ('a aexp)
wenzelm
parents: 5214
diff changeset
   676
            | NUM 'a
wenzelm
parents: 5214
diff changeset
   677
  and
wenzelm
parents: 5214
diff changeset
   678
    'a bexp = LESS ('a aexp) ('a aexp)
wenzelm
parents: 5214
diff changeset
   679
            | AND ('a bexp) ('a bexp)
wenzelm
parents: 5214
diff changeset
   680
            | OR ('a bexp) ('a bexp)
wenzelm
parents: 5214
diff changeset
   681
5267
41a01176b9de disjointness
paulson
parents: 5251
diff changeset
   682
as well as indirectly recursive datatypes such as
5214
75c6392d1274 Adapted to new datatype package.
berghofe
parents: 5207
diff changeset
   683
5217
wenzelm
parents: 5214
diff changeset
   684
  datatype
wenzelm
parents: 5214
diff changeset
   685
    ('a, 'b) term = Var 'a
wenzelm
parents: 5214
diff changeset
   686
                  | App 'b ((('a, 'b) term) list)
5214
75c6392d1274 Adapted to new datatype package.
berghofe
parents: 5207
diff changeset
   687
5217
wenzelm
parents: 5214
diff changeset
   688
The new tactic  mutual_induct_tac [<var_1>, ..., <var_n>] i  performs
wenzelm
parents: 5214
diff changeset
   689
induction on mutually / indirectly recursive datatypes.
wenzelm
parents: 5214
diff changeset
   690
wenzelm
parents: 5214
diff changeset
   691
Primrec equations are now stored in theory and can be accessed via
wenzelm
parents: 5214
diff changeset
   692
<function_name>.simps.
wenzelm
parents: 5214
diff changeset
   693
wenzelm
parents: 5214
diff changeset
   694
INCOMPATIBILITIES:
5214
75c6392d1274 Adapted to new datatype package.
berghofe
parents: 5207
diff changeset
   695
5217
wenzelm
parents: 5214
diff changeset
   696
  - Theories using datatypes must now have theory Datatype as an
wenzelm
parents: 5214
diff changeset
   697
    ancestor.
wenzelm
parents: 5214
diff changeset
   698
  - The specific <typename>.induct_tac no longer exists - use the
wenzelm
parents: 5214
diff changeset
   699
    generic induct_tac instead.
5226
89934cd022a9 Replaced nat.exhaustion by nat.exhaust
berghofe
parents: 5217
diff changeset
   700
  - natE has been renamed to nat.exhaust - use exhaust_tac
5217
wenzelm
parents: 5214
diff changeset
   701
    instead of res_inst_tac ... natE. Note that the variable
5226
89934cd022a9 Replaced nat.exhaustion by nat.exhaust
berghofe
parents: 5217
diff changeset
   702
    names in nat.exhaust differ from the names in natE, this
5217
wenzelm
parents: 5214
diff changeset
   703
    may cause some "fragile" proofs to fail.
wenzelm
parents: 5214
diff changeset
   704
  - The theorems split_<typename>_case and split_<typename>_case_asm
wenzelm
parents: 5214
diff changeset
   705
    have been renamed to <typename>.split and <typename>.split_asm.
wenzelm
parents: 5214
diff changeset
   706
  - Since default sorts of type variables are now handled correctly,
wenzelm
parents: 5214
diff changeset
   707
    some datatype definitions may have to be annotated with explicit
wenzelm
parents: 5214
diff changeset
   708
    sort constraints.
wenzelm
parents: 5214
diff changeset
   709
  - Primrec definitions no longer require function name and type
wenzelm
parents: 5214
diff changeset
   710
    of recursive argument.
5214
75c6392d1274 Adapted to new datatype package.
berghofe
parents: 5207
diff changeset
   711
5217
wenzelm
parents: 5214
diff changeset
   712
Consider using isatool fixdatatype to adapt your theories and proof
wenzelm
parents: 5214
diff changeset
   713
scripts to the new package (backup your sources first!).
wenzelm
parents: 5214
diff changeset
   714
wenzelm
parents: 5214
diff changeset
   715
5726
wenzelm
parents: 5722
diff changeset
   716
* HOL/record package: considerably improved implementation; now
wenzelm
parents: 5722
diff changeset
   717
includes concrete syntax for record types, terms, updates; theorems
wenzelm
parents: 5722
diff changeset
   718
for surjective pairing and splitting !!-bound record variables; proof
wenzelm
parents: 5722
diff changeset
   719
support is as follows:
wenzelm
parents: 5722
diff changeset
   720
wenzelm
parents: 5722
diff changeset
   721
  1) standard conversions (selectors or updates applied to record
wenzelm
parents: 5722
diff changeset
   722
constructor terms) are part of the standard simpset;
wenzelm
parents: 5722
diff changeset
   723
wenzelm
parents: 5722
diff changeset
   724
  2) inject equations of the form ((x, y) = (x', y')) == x=x' & y=y' are
wenzelm
parents: 5722
diff changeset
   725
made part of standard simpset and claset via addIffs;
wenzelm
parents: 5722
diff changeset
   726
wenzelm
parents: 5722
diff changeset
   727
  3) a tactic for record field splitting (record_split_tac) is part of
wenzelm
parents: 5722
diff changeset
   728
the standard claset (addSWrapper);
wenzelm
parents: 5722
diff changeset
   729
wenzelm
parents: 5722
diff changeset
   730
To get a better idea about these rules you may retrieve them via
wenzelm
parents: 5722
diff changeset
   731
something like 'thms "foo.simps"' or 'thms "foo.iffs"', where "foo" is
wenzelm
parents: 5722
diff changeset
   732
the name of your record type.
wenzelm
parents: 5722
diff changeset
   733
wenzelm
parents: 5722
diff changeset
   734
The split tactic 3) conceptually simplifies by the following rule:
wenzelm
parents: 5722
diff changeset
   735
wenzelm
parents: 5722
diff changeset
   736
  "(!!x. PROP ?P x) == (!!a b. PROP ?P (a, b))"
wenzelm
parents: 5722
diff changeset
   737
wenzelm
parents: 5722
diff changeset
   738
Thus any record variable that is bound by meta-all will automatically
wenzelm
parents: 5722
diff changeset
   739
blow up into some record constructor term, consequently the
wenzelm
parents: 5722
diff changeset
   740
simplifications of 1), 2) apply.  Thus force_tac, auto_tac etc. shall
wenzelm
parents: 5722
diff changeset
   741
solve record problems automatically.
wenzelm
parents: 5722
diff changeset
   742
5214
75c6392d1274 Adapted to new datatype package.
berghofe
parents: 5207
diff changeset
   743
5125
463a0e9df5b5 reorganized the main HOL image;
wenzelm
parents: 5109
diff changeset
   744
* reorganized the main HOL image: HOL/Integ and String loaded by
463a0e9df5b5 reorganized the main HOL image;
wenzelm
parents: 5109
diff changeset
   745
default; theory Main includes everything;
463a0e9df5b5 reorganized the main HOL image;
wenzelm
parents: 5109
diff changeset
   746
5650
38bda28c68a2 integer simprocs
paulson
parents: 5572
diff changeset
   747
* automatic simplification of integer sums and comparisons, using cancellation;
38bda28c68a2 integer simprocs
paulson
parents: 5572
diff changeset
   748
5526
e7617b57a3e6 *** empty log message ***
oheimb
parents: 5524
diff changeset
   749
* added option_map_eq_Some and not_Some_eq to the default simpset and claset;
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   750
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   751
* added disj_not1 = "(~P | Q) = (P --> Q)" to the default simpset;
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   752
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   753
* many new identities for unions, intersections, set difference, etc.;
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   754
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   755
* expand_if, expand_split, expand_sum_case and expand_nat_case are now
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   756
called split_if, split_split, split_sum_case and split_nat_case (to go
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   757
with add/delsplits);
5125
463a0e9df5b5 reorganized the main HOL image;
wenzelm
parents: 5109
diff changeset
   758
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   759
* HOL/Prod introduces simplification procedure unit_eq_proc rewriting
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   760
(?x::unit) = (); this is made part of the default simpset, which COULD
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   761
MAKE EXISTING PROOFS FAIL under rare circumstances (consider
5207
wenzelm
parents: 5160
diff changeset
   762
'Delsimprocs [unit_eq_proc];' as last resort); also note that
wenzelm
parents: 5160
diff changeset
   763
unit_abs_eta_conv is added in order to counter the effect of
wenzelm
parents: 5160
diff changeset
   764
unit_eq_proc on (%u::unit. f u), replacing it by f rather than by
wenzelm
parents: 5160
diff changeset
   765
%u.f();
5125
463a0e9df5b5 reorganized the main HOL image;
wenzelm
parents: 5109
diff changeset
   766
5217
wenzelm
parents: 5214
diff changeset
   767
* HOL/Fun INCOMPATIBILITY: `inj_onto' is now called `inj_on' (which
wenzelm
parents: 5214
diff changeset
   768
makes more sense);
5109
b3d18eb3ac20 Adapted to new inductive definition package.
berghofe
parents: 5106
diff changeset
   769
5475
410172655d64 equals0D
paulson
parents: 5428
diff changeset
   770
* HOL/Set INCOMPATIBILITY: rule `equals0D' is now a well-formed destruct rule;
410172655d64 equals0D
paulson
parents: 5428
diff changeset
   771
  It and 'sym RS equals0D' are now in the default  claset, giving automatic
410172655d64 equals0D
paulson
parents: 5428
diff changeset
   772
  disjointness reasoning but breaking a few old proofs.
5267
41a01176b9de disjointness
paulson
parents: 5251
diff changeset
   773
5217
wenzelm
parents: 5214
diff changeset
   774
* HOL/Relation INCOMPATIBILITY: renamed the relational operator r^-1
wenzelm
parents: 5214
diff changeset
   775
to 'converse' from 'inverse' (for compatibility with ZF and some
wenzelm
parents: 5214
diff changeset
   776
literature);
5085
8e5a7942fdea simplification procedure unit_eq_proc rewrites (?x::unit) = ();
wenzelm
parents: 5077
diff changeset
   777
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   778
* HOL/recdef can now declare non-recursive functions, with {} supplied as
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   779
the well-founded relation;
4838
196100237656 cleanup for split_all_tac as wrapper in claset()
oheimb
parents: 4835
diff changeset
   780
5490
85855f65d0c6 From Compl(A) to -A
paulson
parents: 5475
diff changeset
   781
* HOL/Set INCOMPATIBILITY: the complement of set A is now written -A instead of
85855f65d0c6 From Compl(A) to -A
paulson
parents: 5475
diff changeset
   782
    Compl A.  The "Compl" syntax remains available as input syntax for this
85855f65d0c6 From Compl(A) to -A
paulson
parents: 5475
diff changeset
   783
    release ONLY.
85855f65d0c6 From Compl(A) to -A
paulson
parents: 5475
diff changeset
   784
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   785
* HOL/Update: new theory of function updates:
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   786
    f(a:=b) == %x. if x=a then b else f x
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   787
may also be iterated as in f(a:=b,c:=d,...);
5077
71043526295f * HOL/List: new function list_update written xs[i:=v] that updates the i-th
nipkow
parents: 5075
diff changeset
   788
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   789
* HOL/Vimage: new theory for inverse image of a function, syntax f-``B;
4899
447d6b2956ba HOL/Update
paulson
parents: 4880
diff changeset
   790
5282
80c75c862a8f *** empty log message ***
nipkow
parents: 5275
diff changeset
   791
* HOL/List:
80c75c862a8f *** empty log message ***
nipkow
parents: 5275
diff changeset
   792
  - new function list_update written xs[i:=v] that updates the i-th
80c75c862a8f *** empty log message ***
nipkow
parents: 5275
diff changeset
   793
    list position. May also be iterated as in xs[i:=a,j:=b,...].
5428
5a6c4f666a25 Function 'upt'
nipkow
parents: 5407
diff changeset
   794
  - new function `upt' written [i..j(] which generates the list
5a6c4f666a25 Function 'upt'
nipkow
parents: 5407
diff changeset
   795
    [i,i+1,...,j-1], i.e. the upper bound is excluded. To include the upper
5a6c4f666a25 Function 'upt'
nipkow
parents: 5407
diff changeset
   796
    bound write [i..j], which is a shorthand for [i..j+1(].
5282
80c75c862a8f *** empty log message ***
nipkow
parents: 5275
diff changeset
   797
  - new lexicographic orderings and corresponding wellfoundedness theorems.
4779
paulson
parents: 4766
diff changeset
   798
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   799
* HOL/Arith:
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   800
  - removed 'pred' (predecessor) function;
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   801
  - generalized some theorems about n-1;
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   802
  - many new laws about "div" and "mod";
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   803
  - new laws about greatest common divisors (see theory ex/Primes);
4766
9658aab68363 *** empty log message ***
oheimb
parents: 4747
diff changeset
   804
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   805
* HOL/Relation: renamed the relational operator r^-1 "converse"
4842
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
   806
instead of "inverse";
4711
75a9ef36b1fe removed pred;
wenzelm
parents: 4683
diff changeset
   807
5651
ca45d6126c8a *** empty log message ***
nipkow
parents: 5650
diff changeset
   808
* HOL/Induct/Multiset: a theory of multisets, including the wellfoundedness
ca45d6126c8a *** empty log message ***
nipkow
parents: 5650
diff changeset
   809
  of the multiset ordering;
ca45d6126c8a *** empty log message ***
nipkow
parents: 5650
diff changeset
   810
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   811
* directory HOL/Real: a construction of the reals using Dedekind cuts
5651
ca45d6126c8a *** empty log message ***
nipkow
parents: 5650
diff changeset
   812
  (not included by default);
4835
f90a427d903f *** empty log message ***
nipkow
parents: 4828
diff changeset
   813
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   814
* directory HOL/UNITY: Chandy and Misra's UNITY formalism;
4711
75a9ef36b1fe removed pred;
wenzelm
parents: 4683
diff changeset
   815
5651
ca45d6126c8a *** empty log message ***
nipkow
parents: 5650
diff changeset
   816
* directory HOL/Hoare: a new version of Hoare logic which permits many-sorted
ca45d6126c8a *** empty log message ***
nipkow
parents: 5650
diff changeset
   817
  programs, i.e. different program variables may have different types.
ca45d6126c8a *** empty log message ***
nipkow
parents: 5650
diff changeset
   818
5142
c56aa8b59dc0 new stac
paulson
parents: 5140
diff changeset
   819
* calling (stac rew i) now fails if "rew" has no effect on the goal
c56aa8b59dc0 new stac
paulson
parents: 5140
diff changeset
   820
  [previously, this check worked only if the rewrite rule was unconditional]
5308
paulson
parents: 5282
diff changeset
   821
  Now rew can involve either definitions or equalities (either == or =).
5002
7b4c2a153738 * improved the theory data mechanism to support real encapsulation;
wenzelm
parents: 4981
diff changeset
   822
5363
0cf15843b82f isatool install;
wenzelm
parents: 5332
diff changeset
   823
4879
58656c6a3551 "let" is no longer restricted to FOL terms and allows any logical terms
paulson
parents: 4869
diff changeset
   824
*** ZF ***
58656c6a3551 "let" is no longer restricted to FOL terms and allows any logical terms
paulson
parents: 4869
diff changeset
   825
5332
paulson
parents: 5308
diff changeset
   826
* theory Main includes everything; INCOMPATIBILITY: theory ZF.thy contains
paulson
parents: 5308
diff changeset
   827
  only the theorems proved on ZF.ML;
5160
1ff6679144b9 ZF: Main, Update
paulson
parents: 5145
diff changeset
   828
5475
410172655d64 equals0D
paulson
parents: 5428
diff changeset
   829
* ZF INCOMPATIBILITY: rule `equals0D' is now a well-formed destruct rule;
410172655d64 equals0D
paulson
parents: 5428
diff changeset
   830
  It and 'sym RS equals0D' are now in the default  claset, giving automatic
410172655d64 equals0D
paulson
parents: 5428
diff changeset
   831
  disjointness reasoning but breaking a few old proofs.
5267
41a01176b9de disjointness
paulson
parents: 5251
diff changeset
   832
5160
1ff6679144b9 ZF: Main, Update
paulson
parents: 5145
diff changeset
   833
* ZF/Update: new theory of function updates
1ff6679144b9 ZF: Main, Update
paulson
parents: 5145
diff changeset
   834
    with default rewrite rule  f(x:=y) ` z = if(z=x, y, f`z)
1ff6679144b9 ZF: Main, Update
paulson
parents: 5145
diff changeset
   835
  may also be iterated as in f(a:=b,c:=d,...);
1ff6679144b9 ZF: Main, Update
paulson
parents: 5145
diff changeset
   836
4879
58656c6a3551 "let" is no longer restricted to FOL terms and allows any logical terms
paulson
parents: 4869
diff changeset
   837
* 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
   838
5142
c56aa8b59dc0 new stac
paulson
parents: 5140
diff changeset
   839
* calling (stac rew i) now fails if "rew" has no effect on the goal
c56aa8b59dc0 new stac
paulson
parents: 5140
diff changeset
   840
  [previously, this check worked only if the rewrite rule was unconditional]
5308
paulson
parents: 5282
diff changeset
   841
  Now rew can involve either definitions or equalities (either == or =).
5142
c56aa8b59dc0 new stac
paulson
parents: 5140
diff changeset
   842
5160
1ff6679144b9 ZF: Main, Update
paulson
parents: 5145
diff changeset
   843
* case_tac provided for compatibility with HOL
1ff6679144b9 ZF: Main, Update
paulson
parents: 5145
diff changeset
   844
    (like the old excluded_middle_tac, but with subgoals swapped)
1ff6679144b9 ZF: Main, Update
paulson
parents: 5145
diff changeset
   845
4842
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
   846
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   847
*** Internal programming interfaces ***
5002
7b4c2a153738 * improved the theory data mechanism to support real encapsulation;
wenzelm
parents: 4981
diff changeset
   848
5251
wenzelm
parents: 5226
diff changeset
   849
* Pure: several new basic modules made available for general use, see
wenzelm
parents: 5226
diff changeset
   850
also src/Pure/README;
5207
wenzelm
parents: 5160
diff changeset
   851
5008
6f56d9650ee9 new type-safe user interface for theory data;
wenzelm
parents: 5002
diff changeset
   852
* improved the theory data mechanism to support encapsulation (data
6f56d9650ee9 new type-safe user interface for theory data;
wenzelm
parents: 5002
diff changeset
   853
kind name replaced by private Object.kind, acting as authorization
5373
wenzelm
parents: 5363
diff changeset
   854
key); new type-safe user interface via functor TheoryDataFun; generic
wenzelm
parents: 5363
diff changeset
   855
print_data function becomes basically useless;
5002
7b4c2a153738 * improved the theory data mechanism to support real encapsulation;
wenzelm
parents: 4981
diff changeset
   856
5251
wenzelm
parents: 5226
diff changeset
   857
* removed global_names compatibility flag -- all theory declarations
wenzelm
parents: 5226
diff changeset
   858
are qualified by default;
wenzelm
parents: 5226
diff changeset
   859
5085
8e5a7942fdea simplification procedure unit_eq_proc rewrites (?x::unit) = ();
wenzelm
parents: 5077
diff changeset
   860
* module Pure/Syntax now offers quote / antiquote translation
8e5a7942fdea simplification procedure unit_eq_proc rewrites (?x::unit) = ();
wenzelm
parents: 5077
diff changeset
   861
functions (useful for Hoare logic etc. with implicit dependencies);
5373
wenzelm
parents: 5363
diff changeset
   862
see HOL/ex/Antiquote for an example use;
5085
8e5a7942fdea simplification procedure unit_eq_proc rewrites (?x::unit) = ();
wenzelm
parents: 5077
diff changeset
   863
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   864
* Simplifier now offers conversions (asm_)(full_)rewrite: simpset ->
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   865
cterm -> thm;
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   866
5207
wenzelm
parents: 5160
diff changeset
   867
* new tactical CHANGED_GOAL for checking that a tactic modifies a
wenzelm
parents: 5160
diff changeset
   868
subgoal;
5142
c56aa8b59dc0 new stac
paulson
parents: 5140
diff changeset
   869
5251
wenzelm
parents: 5226
diff changeset
   870
* Display.print_goals function moved to Locale.print_goals;
wenzelm
parents: 5226
diff changeset
   871
5731
f84dc3b811e9 current_goals_markers;
wenzelm
parents: 5726
diff changeset
   872
* standard print function for goals supports current_goals_markers
f84dc3b811e9 current_goals_markers;
wenzelm
parents: 5726
diff changeset
   873
variable for marking begin of proof, end of proof, start of goal; the
f84dc3b811e9 current_goals_markers;
wenzelm
parents: 5726
diff changeset
   874
default is ("", "", ""); setting current_goals_markers := ("<proof>",
f84dc3b811e9 current_goals_markers;
wenzelm
parents: 5726
diff changeset
   875
"</proof>", "<goal>") causes SGML like tagged proof state printing,
f84dc3b811e9 current_goals_markers;
wenzelm
parents: 5726
diff changeset
   876
for example;
f84dc3b811e9 current_goals_markers;
wenzelm
parents: 5726
diff changeset
   877
5002
7b4c2a153738 * improved the theory data mechanism to support real encapsulation;
wenzelm
parents: 4981
diff changeset
   878
7b4c2a153738 * improved the theory data mechanism to support real encapsulation;
wenzelm
parents: 4981
diff changeset
   879
4410
wenzelm
parents: 4388
diff changeset
   880
New in Isabelle98 (January 1998)
wenzelm
parents: 4388
diff changeset
   881
--------------------------------
wenzelm
parents: 4388
diff changeset
   882
wenzelm
parents: 4388
diff changeset
   883
*** Overview of INCOMPATIBILITIES (see below for more details) ***
wenzelm
parents: 4388
diff changeset
   884
wenzelm
parents: 4388
diff changeset
   885
* changed lexical syntax of terms / types: dots made part of long
wenzelm
parents: 4388
diff changeset
   886
identifiers, e.g. "%x.x" no longer possible, should be "%x. x";
wenzelm
parents: 4388
diff changeset
   887
wenzelm
parents: 4388
diff changeset
   888
* simpset (and claset) reference variable replaced by functions
wenzelm
parents: 4388
diff changeset
   889
simpset / simpset_ref;
wenzelm
parents: 4388
diff changeset
   890
wenzelm
parents: 4388
diff changeset
   891
* no longer supports theory aliases (via merge) and non-trivial
wenzelm
parents: 4388
diff changeset
   892
implicit merge of thms' signatures;
wenzelm
parents: 4388
diff changeset
   893
wenzelm
parents: 4388
diff changeset
   894
* most internal names of constants changed due to qualified names;
wenzelm
parents: 4388
diff changeset
   895
wenzelm
parents: 4388
diff changeset
   896
* changed Pure/Sequence interface (see Pure/seq.ML);
wenzelm
parents: 4388
diff changeset
   897
3454
40b1287347d7 removed;
wenzelm
parents: 3338
diff changeset
   898
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   899
*** General Changes ***
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   900
4174
wenzelm
parents: 4154
diff changeset
   901
* hierachically structured name spaces (for consts, types, axms, thms
3943
b6e0c90f3bf4 tuned qualified names;
wenzelm
parents: 3930
diff changeset
   902
etc.); new lexical class 'longid' (e.g. Foo.bar.x) may render much of
4108
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   903
old input syntactically incorrect (e.g. "%x.x"); COMPATIBILITY:
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   904
isatool fixdots ensures space after dots (e.g. "%x. x"); set
4174
wenzelm
parents: 4154
diff changeset
   905
long_names for fully qualified output names; NOTE: ML programs
wenzelm
parents: 4154
diff changeset
   906
(special tactics, packages etc.) referring to internal names may have
wenzelm
parents: 4154
diff changeset
   907
to be adapted to cope with fully qualified names; in case of severe
wenzelm
parents: 4154
diff changeset
   908
backward campatibility problems try setting 'global_names' at compile
wenzelm
parents: 4154
diff changeset
   909
time to have enrything declared within a flat name space; one may also
wenzelm
parents: 4154
diff changeset
   910
fine tune name declarations in theories via the 'global' and 'local'
wenzelm
parents: 4154
diff changeset
   911
section;
4108
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   912
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   913
* reimplemented the implicit simpset and claset using the new anytype
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   914
data filed in signatures; references simpset:simpset ref etc. are
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   915
replaced by functions simpset:unit->simpset and
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   916
simpset_ref:unit->simpset ref; COMPATIBILITY: use isatool fixclasimp
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   917
to patch your ML files accordingly;
3856
177c64693954 rearranged and added TLA
paulson
parents: 3851
diff changeset
   918
3857
16198fde5af5 browser info;
wenzelm
parents: 3856
diff changeset
   919
* HTML output now includes theory graph data for display with Java
16198fde5af5 browser info;
wenzelm
parents: 3856
diff changeset
   920
applet or isatool browser; data generated automatically via isatool
3901
wenzelm
parents: 3871
diff changeset
   921
usedir (see -i option, ISABELLE_USEDIR_OPTIONS);
3857
16198fde5af5 browser info;
wenzelm
parents: 3856
diff changeset
   922
3856
177c64693954 rearranged and added TLA
paulson
parents: 3851
diff changeset
   923
* defs may now be conditional; improved rewrite_goals_tac to handle
177c64693954 rearranged and added TLA
paulson
parents: 3851
diff changeset
   924
conditional equations;
177c64693954 rearranged and added TLA
paulson
parents: 3851
diff changeset
   925
4174
wenzelm
parents: 4154
diff changeset
   926
* defs now admits additional type arguments, using TYPE('a) syntax;
wenzelm
parents: 4154
diff changeset
   927
3901
wenzelm
parents: 3871
diff changeset
   928
* theory aliases via merge (e.g. M=A+B+C) no longer supported, always
wenzelm
parents: 3871
diff changeset
   929
creates a new theory node; implicit merge of thms' signatures is
4112
wenzelm
parents: 4108
diff changeset
   930
restricted to 'trivial' ones; COMPATIBILITY: one may have to use
3901
wenzelm
parents: 3871
diff changeset
   931
transfer:theory->thm->thm in (rare) cases;
wenzelm
parents: 3871
diff changeset
   932
3968
ec138de716d9 improved handling of draft signatures / theories; draft thms (and
wenzelm
parents: 3964
diff changeset
   933
* improved handling of draft signatures / theories; draft thms (and
ec138de716d9 improved handling of draft signatures / theories; draft thms (and
wenzelm
parents: 3964
diff changeset
   934
ctyps, cterms) are automatically promoted to real ones;
ec138de716d9 improved handling of draft signatures / theories; draft thms (and
wenzelm
parents: 3964
diff changeset
   935
3901
wenzelm
parents: 3871
diff changeset
   936
* slightly changed interfaces for oracles: admit many per theory, named
wenzelm
parents: 3871
diff changeset
   937
(e.g. oracle foo = mlfun), additional name argument for invoke_oracle;
wenzelm
parents: 3871
diff changeset
   938
wenzelm
parents: 3871
diff changeset
   939
* print_goals: optional output of const types (set show_consts and
wenzelm
parents: 3871
diff changeset
   940
show_types);
3851
fe9932a7cd46 print_goals: optional output of const types (set show_consts);
wenzelm
parents: 3846
diff changeset
   941
4388
wenzelm
parents: 4381
diff changeset
   942
* improved output of warnings (###) and errors (***);
3697
c5833dfcc2cc Pure: fixed idt/idts vs. pttrn/pttrns syntactic categories;
wenzelm
parents: 3671
diff changeset
   943
4178
e64ff1c1bc70 subgoal_tac displays a warning if the new subgoal has type variables
paulson
parents: 4174
diff changeset
   944
* 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
   945
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   946
* removed old README and Makefiles;
3697
c5833dfcc2cc Pure: fixed idt/idts vs. pttrn/pttrns syntactic categories;
wenzelm
parents: 3671
diff changeset
   947
3856
177c64693954 rearranged and added TLA
paulson
parents: 3851
diff changeset
   948
* 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
   949
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   950
* removed obsolete init_pps and init_database;
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   951
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   952
* deleted the obsolete tactical STATE, which was declared by
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   953
    fun STATE tacfun st = tacfun st st;
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   954
4388
wenzelm
parents: 4381
diff changeset
   955
* cd and use now support path variables, e.g. $ISABELLE_HOME, or ~
wenzelm
parents: 4381
diff changeset
   956
(which abbreviates $HOME);
4269
a045600f0c98 cd, use etc. now support path variables;
wenzelm
parents: 4207
diff changeset
   957
a045600f0c98 cd, use etc. now support path variables;
wenzelm
parents: 4207
diff changeset
   958
* changed Pure/Sequence interface (see Pure/seq.ML); COMPATIBILITY:
a045600f0c98 cd, use etc. now support path variables;
wenzelm
parents: 4207
diff changeset
   959
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
   960
qualified references to the Sequence structure only!);
a045600f0c98 cd, use etc. now support path variables;
wenzelm
parents: 4207
diff changeset
   961
4381
wenzelm
parents: 4373
diff changeset
   962
* use_thy no longer requires writable current directory; it always
wenzelm
parents: 4373
diff changeset
   963
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
   964
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   965
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   966
*** Classical Reasoner ***
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   967
3744
wenzelm
parents: 3719
diff changeset
   968
* Clarify_tac, clarify_tac, clarify_step_tac, Clarify_step_tac: new
wenzelm
parents: 3719
diff changeset
   969
tactics that use classical reasoning to simplify a subgoal without
wenzelm
parents: 3719
diff changeset
   970
splitting it into several subgoals;
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   971
3719
6a142dab2a08 Safe_tac; qed_spec_mp in FOL
paulson
parents: 3715
diff changeset
   972
* Safe_tac: like safe_tac but uses the default claset;
6a142dab2a08 Safe_tac; qed_spec_mp in FOL
paulson
parents: 3715
diff changeset
   973
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   974
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   975
*** Simplifier ***
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   976
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   977
* added simplification meta rules:
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   978
    (asm_)(full_)simplify: simpset -> thm -> thm;
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   979
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   980
* simplifier.ML no longer part of Pure -- has to be loaded by object
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   981
logics (again);
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   982
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   983
* added prems argument to simplification procedures;
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   984
4325
e72cba5af6c5 addsplits now in FOL, ZF too
paulson
parents: 4269
diff changeset
   985
* HOL, FOL, ZF: added infix function `addsplits':
e72cba5af6c5 addsplits now in FOL, ZF too
paulson
parents: 4269
diff changeset
   986
  instead of `<simpset> setloop (split_tac <thms>)'
e72cba5af6c5 addsplits now in FOL, ZF too
paulson
parents: 4269
diff changeset
   987
  you can simply write `<simpset> addsplits <thms>'
e72cba5af6c5 addsplits now in FOL, ZF too
paulson
parents: 4269
diff changeset
   988
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   989
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   990
*** Syntax ***
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   991
4174
wenzelm
parents: 4154
diff changeset
   992
* TYPE('a) syntax for type reflection terms;
wenzelm
parents: 4154
diff changeset
   993
3985
wenzelm
parents: 3982
diff changeset
   994
* no longer handles consts with name "" -- declare as 'syntax' instead;
3856
177c64693954 rearranged and added TLA
paulson
parents: 3851
diff changeset
   995
177c64693954 rearranged and added TLA
paulson
parents: 3851
diff changeset
   996
* pretty printer: changed order of mixfix annotation preference (again!);
3846
6061fa463784 hierachically structured name spaces;
wenzelm
parents: 3822
diff changeset
   997
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   998
* Pure: fixed idt/idts vs. pttrn/pttrns syntactic categories;
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   999
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
  1000
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
  1001
*** HOL ***
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
  1002
5726
wenzelm
parents: 5722
diff changeset
  1003
* 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
  1004
  with `addloop' of the simplifier to faciliate case splitting in premises.
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
  1005
4035
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
  1006
* HOL/TLA: Stephan Merz's formalization of Lamport's Temporal Logic of Actions;
3985
wenzelm
parents: 3982
diff changeset
  1007
wenzelm
parents: 3982
diff changeset
  1008
* HOL/Auth: new protocol proofs including some for the Internet
4035
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
  1009
  protocol TLS;
3985
wenzelm
parents: 3982
diff changeset
  1010
4125
wenzelm
parents: 4123
diff changeset
  1011
* HOL/Map: new theory of `maps' a la VDM;
3982
2a903ba8d39e HOL/Map
nipkow
parents: 3968
diff changeset
  1012
4335
b0acd74da01d nat_cancel simprocs;
wenzelm
parents: 4325
diff changeset
  1013
* HOL/simplifier: simplification procedures nat_cancel_sums for
b0acd74da01d nat_cancel simprocs;
wenzelm
parents: 4325
diff changeset
  1014
cancelling out common nat summands from =, <, <= (in)equalities, or
b0acd74da01d nat_cancel simprocs;
wenzelm
parents: 4325
diff changeset
  1015
differences; simplification procedures nat_cancel_factor for
b0acd74da01d nat_cancel simprocs;
wenzelm
parents: 4325
diff changeset
  1016
cancelling common factor from =, <, <= (in)equalities over natural
4373
2f831a45d571 nat_cancel enabled by default;
wenzelm
parents: 4370
diff changeset
  1017
sums; nat_cancel contains both kinds of procedures, it is installed by
2f831a45d571 nat_cancel enabled by default;
wenzelm
parents: 4370
diff changeset
  1018
default in Arith.thy -- this COULD MAKE EXISTING PROOFS FAIL;
4335
b0acd74da01d nat_cancel simprocs;
wenzelm
parents: 4325
diff changeset
  1019
3580
04c6ae944b5e new simproc
nipkow
parents: 3579
diff changeset
  1020
* HOL/simplifier: terms of the form
4325
e72cba5af6c5 addsplits now in FOL, ZF too
paulson
parents: 4269
diff changeset
  1021
  `? x. P1(x) & ... & Pn(x) & x=t & Q1(x) & ... Qn(x)'  (or t=x)
3580
04c6ae944b5e new simproc
nipkow
parents: 3579
diff changeset
  1022
  are rewritten to
4035
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
  1023
  `P1(t) & ... & Pn(t) & Q1(t) & ... Qn(t)',
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
  1024
  and those of the form
4325
e72cba5af6c5 addsplits now in FOL, ZF too
paulson
parents: 4269
diff changeset
  1025
  `! 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
  1026
  are rewritten to
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
  1027
  `P1(t) & ... & Pn(t) & Q1(t) & ... Qn(t) --> R(t)',
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
  1028
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
  1029
* HOL/datatype
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
  1030
  Each datatype `t' now comes with a theorem `split_t_case' of the form
3580
04c6ae944b5e new simproc
nipkow
parents: 3579
diff changeset
  1031
4035
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
  1032
  P(t_case f1 ... fn x) =
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
  1033
     ( (!y1 ... ym1. x = C1 y1 ... ym1 --> P(f1 y1 ... ym1)) &
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
  1034
        ...
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
  1035
       (!y1 ... ymn. x = Cn y1 ... ymn --> P(f1 y1 ... ymn))
4035
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
  1036
     )
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
  1037
4930
89271bc4e7ed extended addsplits and delsplits to handle also split rules for assumptions
oheimb
parents: 4915
diff changeset
  1038
  and a theorem `split_t_case_asm' of the form
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
  1039
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
  1040
  P(t_case f1 ... fn x) =
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
  1041
    ~( (? y1 ... ym1. x = C1 y1 ... ym1 & ~P(f1 y1 ... ym1)) |
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
  1042
        ...
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
  1043
       (? y1 ... ymn. x = Cn y1 ... ymn & ~P(f1 y1 ... ymn))
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
  1044
     )
4930
89271bc4e7ed extended addsplits and delsplits to handle also split rules for assumptions
oheimb
parents: 4915
diff changeset
  1045
  which can be added to a simpset via `addsplits'. The existing theorems
89271bc4e7ed extended addsplits and delsplits to handle also split rules for assumptions
oheimb
parents: 4915
diff changeset
  1046
  expand_list_case and expand_option_case have been renamed to
89271bc4e7ed extended addsplits and delsplits to handle also split rules for assumptions
oheimb
parents: 4915
diff changeset
  1047
  split_list_case and split_option_case.
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
  1048
4361
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
  1049
* HOL/Arithmetic:
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
  1050
  - `pred n' is automatically converted to `n-1'.
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
  1051
    Users are strongly encouraged not to use `pred' any longer,
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
  1052
    because it will disappear altogether at some point.
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
  1053
  - Users are strongly encouraged to write "0 < n" rather than
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
  1054
    "n ~= 0". Theorems and proof tools have been modified towards this
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
  1055
    `standard'.
4357
b852e2d2a39a n ~= 0 should become 0 < n
nipkow
parents: 4335
diff changeset
  1056
4502
337c073de95e nth -> !
nipkow
parents: 4410
diff changeset
  1057
* HOL/Lists:
337c073de95e nth -> !
nipkow
parents: 4410
diff changeset
  1058
  the function "set_of_list" has been renamed "set" (and its theorems too);
337c073de95e nth -> !
nipkow
parents: 4410
diff changeset
  1059
  the function "nth" now takes its arguments in the reverse order and
337c073de95e nth -> !
nipkow
parents: 4410
diff changeset
  1060
  has acquired the infix notation "!" as in "xs!n".
3570
d3662f90c453 set_of_list -> set
paulson
parents: 3567
diff changeset
  1061
4154
17a3a2c5a35f UNIV & UNION1
paulson
parents: 4125
diff changeset
  1062
* HOL/Set: UNIV is now a constant and is no longer translated to Compl{};
17a3a2c5a35f UNIV & UNION1
paulson
parents: 4125
diff changeset
  1063
17a3a2c5a35f UNIV & UNION1
paulson
parents: 4125
diff changeset
  1064
* 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
  1065
  specialist theorems (like UN1_I) are gone.  Similarly for (INT x.B x);
17a3a2c5a35f UNIV & UNION1
paulson
parents: 4125
diff changeset
  1066
4575
e59cf7d816fe HOL/record;
wenzelm
parents: 4502
diff changeset
  1067
* HOL/record: extensible records with schematic structural subtyping
e59cf7d816fe HOL/record;
wenzelm
parents: 4502
diff changeset
  1068
(single inheritance); EXPERIMENTAL version demonstrating the encoding,
e59cf7d816fe HOL/record;
wenzelm
parents: 4502
diff changeset
  1069
still lacks various theorems and concrete record syntax;
e59cf7d816fe HOL/record;
wenzelm
parents: 4502
diff changeset
  1070
4125
wenzelm
parents: 4123
diff changeset
  1071
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
  1072
*** HOLCF ***
3535
19bd6c8274c4 defs may now be conditional;
wenzelm
parents: 3511
diff changeset
  1073
4125
wenzelm
parents: 4123
diff changeset
  1074
* removed "axioms" and "generated by" sections;
wenzelm
parents: 4123
diff changeset
  1075
4123
9600dd68d35b *** empty log message ***
oheimb
parents: 4112
diff changeset
  1076
* replaced "ops" section by extended "consts" section, which is capable of
4125
wenzelm
parents: 4123
diff changeset
  1077
  handling the continuous function space "->" directly;
wenzelm
parents: 4123
diff changeset
  1078
wenzelm
parents: 4123
diff changeset
  1079
* domain package:
wenzelm
parents: 4123
diff changeset
  1080
  . proves theorems immediately and stores them in the theory,
wenzelm
parents: 4123
diff changeset
  1081
  . creates hierachical name space,
wenzelm
parents: 4123
diff changeset
  1082
  . now uses normal mixfix annotations (instead of cinfix...),
wenzelm
parents: 4123
diff changeset
  1083
  . minor changes to some names and values (for consistency),
wenzelm
parents: 4123
diff changeset
  1084
  . e.g. cases -> casedist, dists_eq -> dist_eqs, [take_lemma] -> take_lemmas,
wenzelm
parents: 4123
diff changeset
  1085
  . separator between mutual domain defs: changed "," to "and",
wenzelm
parents: 4123
diff changeset
  1086
  . improved handling of sort constraints;  now they have to
wenzelm
parents: 4123
diff changeset
  1087
    appear on the left-hand side of the equations only;
4123
9600dd68d35b *** empty log message ***
oheimb
parents: 4112
diff changeset
  1088
9600dd68d35b *** empty log message ***
oheimb
parents: 4112
diff changeset
  1089
* fixed LAM <x,y,zs>.b syntax;
3567
e2539e1980b4 added simplification meta rules;
wenzelm
parents: 3561
diff changeset
  1090
3744
wenzelm
parents: 3719
diff changeset
  1091
* added extended adm_tac to simplifier in HOLCF -- can now discharge
wenzelm
parents: 3719
diff changeset
  1092
adm (%x. P (t x)), where P is chainfinite and t continuous;
3579
8bd9b4b3b61d *** empty log message ***
wenzelm
parents: 3570
diff changeset
  1093
8bd9b4b3b61d *** empty log message ***
wenzelm
parents: 3570
diff changeset
  1094
3719
6a142dab2a08 Safe_tac; qed_spec_mp in FOL
paulson
parents: 3715
diff changeset
  1095
*** FOL and ZF ***
6a142dab2a08 Safe_tac; qed_spec_mp in FOL
paulson
parents: 3715
diff changeset
  1096
5726
wenzelm
parents: 5722
diff changeset
  1097
* 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
  1098
  with `addloop' of the simplifier to faciliate case splitting in premises.
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
  1099
3744
wenzelm
parents: 3719
diff changeset
  1100
* qed_spec_mp, qed_goal_spec_mp, qed_goalw_spec_mp are available, as
wenzelm
parents: 3719
diff changeset
  1101
in HOL, they strip ALL and --> from proved theorems;
wenzelm
parents: 3719
diff changeset
  1102
3719
6a142dab2a08 Safe_tac; qed_spec_mp in FOL
paulson
parents: 3715
diff changeset
  1103
3579
8bd9b4b3b61d *** empty log message ***
wenzelm
parents: 3570
diff changeset
  1104
3006
wenzelm
parents: 3002
diff changeset
  1105
New in Isabelle94-8 (May 1997)
wenzelm
parents: 3002
diff changeset
  1106
------------------------------
2654
6efa602921d1 *** empty log message ***
wenzelm
parents: 2653
diff changeset
  1107
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1108
*** General Changes ***
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1109
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1110
* 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
  1111
still somewhat experimental); old Makefiles etc. still functional;
2971
c1e1e8406fb2 *** empty log message ***
wenzelm
parents: 2927
diff changeset
  1112
3205
816a1f9fd620 *** empty log message ***
wenzelm
parents: 3116
diff changeset
  1113
* new 'Isabelle System Manual';
816a1f9fd620 *** empty log message ***
wenzelm
parents: 3116
diff changeset
  1114
2825
a94dba60d5f2 *** empty log message ***
wenzelm
parents: 2773
diff changeset
  1115
* INSTALL text, together with ./configure and ./build scripts;
2773
36fdd908a26c *** empty log message ***
wenzelm
parents: 2756
diff changeset
  1116
3006
wenzelm
parents: 3002
diff changeset
  1117
* reimplemented type inference for greater efficiency, better error
wenzelm
parents: 3002
diff changeset
  1118
messages and clean internal interface;
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1119
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1120
* 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
  1121
setting goals_limit);
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1122
3006
wenzelm
parents: 3002
diff changeset
  1123
wenzelm
parents: 3002
diff changeset
  1124
*** Syntax ***
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1125
3116
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
  1126
* supports alternative (named) syntax tables (parser and pretty
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
  1127
printer); internal interface is provided by add_modesyntax(_i);
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
  1128
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1129
* 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
  1130
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
  1131
"symbols" syntax table;
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1132
2705
d6e83a02061d *** empty log message ***
wenzelm
parents: 2654
diff changeset
  1133
* added token_translation interface (may translate name tokens in
2756
643cba384a61 *** empty log message ***
wenzelm
parents: 2747
diff changeset
  1134
arbitrary ways, dependent on their type (free, bound, tfree, ...) and
3116
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
  1135
the current print_mode); IMPORTANT: user print translation functions
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
  1136
are responsible for marking newly introduced bounds
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
  1137
(Syntax.mark_boundT);
2705
d6e83a02061d *** empty log message ***
wenzelm
parents: 2654
diff changeset
  1138
2730
865995b744f5 *** empty log message ***
wenzelm
parents: 2726
diff changeset
  1139
* token translations for modes "xterm" and "xterm_color" that display
3006
wenzelm
parents: 3002
diff changeset
  1140
names in bold, underline etc. or colors (which requires a color
wenzelm
parents: 3002
diff changeset
  1141
version of xterm);
2730
865995b744f5 *** empty log message ***
wenzelm
parents: 2726
diff changeset
  1142
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1143
* 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
  1144
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1145
* added typed_print_translation (like print_translation, but may
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1146
access type of constant);
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1147
3006
wenzelm
parents: 3002
diff changeset
  1148
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1149
*** Classical Reasoner ***
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1150
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1151
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
  1152
some limitations.  Blast_tac...
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1153
  + ignores addss, addbefore, addafter; this restriction is intrinsic
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1154
  + ignores elimination rules that don't have the correct format
5726
wenzelm
parents: 5722
diff changeset
  1155
        (the conclusion MUST be a formula variable)
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1156
  + ignores types, which can make HOL proofs fail
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1157
  + 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
  1158
    [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
  1159
  + 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
  1160
3107
wenzelm
parents: 3042
diff changeset
  1161
* substitution with equality assumptions no longer permutes other
wenzelm
parents: 3042
diff changeset
  1162
assumptions;
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1163
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1164
* 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
  1165
setwrapper to setWrapper and compwrapper to compWrapper; added safe wrapper
3107
wenzelm
parents: 3042
diff changeset
  1166
(and access functions for it);
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1167
5726
wenzelm
parents: 5722
diff changeset
  1168
* improved combination of classical reasoner and simplifier:
3317
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
  1169
  + functions for handling clasimpsets
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
  1170
  + improvement of addss: now the simplifier is called _after_ the
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
  1171
    safe steps.
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
  1172
  + safe variant of addss called addSss: uses safe simplifications
5726
wenzelm
parents: 5722
diff changeset
  1173
    _during_ the safe steps. It is more complete as it allows multiple
3317
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
  1174
    instantiations of unknowns (e.g. with slow_tac).
3006
wenzelm
parents: 3002
diff changeset
  1175
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1176
*** Simplifier ***
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1177
3006
wenzelm
parents: 3002
diff changeset
  1178
* added interface for simplification procedures (functions that
wenzelm
parents: 3002
diff changeset
  1179
produce *proven* rewrite rules on the fly, depending on current
wenzelm
parents: 3002
diff changeset
  1180
redex);
wenzelm
parents: 3002
diff changeset
  1181
wenzelm
parents: 3002
diff changeset
  1182
* ordering on terms as parameter (used for ordered rewriting);
wenzelm
parents: 3002
diff changeset
  1183
3107
wenzelm
parents: 3042
diff changeset
  1184
* 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
  1185
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1186
* 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
  1187
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
  1188
functions setsolver and addsolver have been renamed to setSolver and
3107
wenzelm
parents: 3042
diff changeset
  1189
addSolver; added safe_asm_full_simp_tac;
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1190
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1191
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1192
*** HOL ***
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1193
3042
21cd332b65d3 induct_tac
nipkow
parents: 3006
diff changeset
  1194
* a generic induction tactic `induct_tac' which works for all datatypes and
3107
wenzelm
parents: 3042
diff changeset
  1195
also for type `nat';
3042
21cd332b65d3 induct_tac
nipkow
parents: 3006
diff changeset
  1196
3316
nipkow
parents: 3227
diff changeset
  1197
* a generic case distinction tactic `exhaust_tac' which works for all
nipkow
parents: 3227
diff changeset
  1198
datatypes and also for type `nat';
nipkow
parents: 3227
diff changeset
  1199
nipkow
parents: 3227
diff changeset
  1200
* each datatype comes with a function `size';
nipkow
parents: 3227
diff changeset
  1201
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1202
* patterns in case expressions allow tuple patterns as arguments to
3107
wenzelm
parents: 3042
diff changeset
  1203
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
  1204
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1205
* primrec now also works with type nat;
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1206
3338
b99d750f6a37 Added recdef
paulson
parents: 3321
diff changeset
  1207
* recdef: a new declaration form, allows general recursive functions to be
b99d750f6a37 Added recdef
paulson
parents: 3321
diff changeset
  1208
defined in theory files.  See HOL/ex/Fib, HOL/ex/Primes, HOL/Subst/Unify.
b99d750f6a37 Added recdef
paulson
parents: 3321
diff changeset
  1209
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1210
* the constant for negation has been renamed from "not" to "Not" to
3107
wenzelm
parents: 3042
diff changeset
  1211
harmonize with FOL, ZF, LK, etc.;
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1212
3107
wenzelm
parents: 3042
diff changeset
  1213
* HOL/ex/LFilter theory of a corecursive "filter" functional for
wenzelm
parents: 3042
diff changeset
  1214
infinite lists;
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1215
3227
9190438471ea *** empty log message ***
wenzelm
parents: 3205
diff changeset
  1216
* HOL/Modelcheck demonstrates invocation of model checker oracle;
9190438471ea *** empty log message ***
wenzelm
parents: 3205
diff changeset
  1217
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1218
* 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
  1219
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
  1220
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1221
* more examples in HOL/MiniML and HOL/Auth;
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1222
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1223
* more default rewrite rules for quantifiers, union/intersection;
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1224
3321
c609a0119fd8 arbitrary
nipkow
parents: 3317
diff changeset
  1225
* a new constant `arbitrary == @x.False';
c609a0119fd8 arbitrary
nipkow
parents: 3317
diff changeset
  1226
3107
wenzelm
parents: 3042
diff changeset
  1227
* HOLCF/IOA replaces old HOL/IOA;
wenzelm
parents: 3042
diff changeset
  1228
5726
wenzelm
parents: 5722
diff changeset
  1229
* HOLCF changes: derived all rules and arities
wenzelm
parents: 5722
diff changeset
  1230
  + axiomatic type classes instead of classes
2653
f1a6997cdc06 described changes for HOLCF-Version without rules and arities
slotosch
parents: 2649
diff changeset
  1231
  + typedef instead of faking type definitions
2747
9fdc1461085f Tidied and updated
paulson
parents: 2732
diff changeset
  1232
  + eliminated the internal constants less_fun, less_cfun, UU_fun, UU_cfun etc.
2730
865995b744f5 *** empty log message ***
wenzelm
parents: 2726
diff changeset
  1233
  + 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
  1234
  + eliminated the types void, one, tr
f1a6997cdc06 described changes for HOLCF-Version without rules and arities
slotosch
parents: 2649
diff changeset
  1235
  + 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
  1236
  + eliminated blift from Lift3.thy (use Def instead of blift)
3107
wenzelm
parents: 3042
diff changeset
  1237
  all eliminated rules are derived as theorems --> no visible changes ;
2649
2edc5b01e5a7 improved description of recent changes
oheimb
parents: 2639
diff changeset
  1238
3006
wenzelm
parents: 3002
diff changeset
  1239
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1240
*** ZF ***
2553
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
  1241
2865
77daca16b2f4 ZF.thy is again usable
paulson
parents: 2825
diff changeset
  1242
* 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
  1243
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
  1244
as ZF_cs addSIs [equalityI];
2553
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
  1245
2554
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1246
2732
84fc9c3b6bf0 *** empty log message ***
wenzelm
parents: 2731
diff changeset
  1247
2553
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
  1248
New in Isabelle94-7 (November 96)
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
  1249
---------------------------------
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
  1250
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
  1251
* allowing negative levels (as offsets) in prlev and choplev;
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
  1252
2554
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1253
* super-linear speedup for large simplifications;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1254
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1255
* FOL, ZF and HOL now use miniscoping: rewriting pushes
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1256
quantifications in as far as possible (COULD MAKE EXISTING PROOFS
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1257
FAIL); can suppress it using the command Delsimps (ex_simps @
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1258
all_simps); De Morgan laws are also now included, by default;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1259
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1260
* improved printing of ==>  :  ~:
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1261
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1262
* new object-logic "Sequents" adds linear logic, while replacing LK
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1263
and Modal (thanks to Sara Kalvala);
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1264
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1265
* HOL/Auth: correctness proofs for authentication protocols;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1266
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1267
* HOL: new auto_tac combines rewriting and classical reasoning (many
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1268
examples on HOL/Auth);
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1269
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1270
* HOL: new command AddIffs for declaring theorems of the form P=Q to
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1271
the rewriter and classical reasoner simultaneously;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1272
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1273
* function uresult no longer returns theorems in "standard" format;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1274
regain previous version by: val uresult = standard o uresult;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1275
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1276
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1277
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1278
New in Isabelle94-6
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1279
-------------------
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1280
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1281
* oracles -- these establish an interface between Isabelle and trusted
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1282
external reasoners, which may deliver results as theorems;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1283
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1284
* proof objects (in particular record all uses of oracles);
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1285
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1286
* Simp_tac, Fast_tac, etc. that refer to implicit simpset / claset;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1287
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1288
* "constdefs" section in theory files;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1289
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1290
* "primrec" section (HOL) no longer requires names;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1291
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1292
* internal type "tactic" now simply "thm -> thm Sequence.seq";
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1293
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1294
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1295
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1296
New in Isabelle94-5
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1297
-------------------
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1298
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1299
* reduced space requirements;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1300
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1301
* automatic HTML generation from theories;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1302
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1303
* theory files no longer require "..." (quotes) around most types;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1304
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1305
* new examples, including two proofs of the Church-Rosser theorem;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1306
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1307
* non-curried (1994) version of HOL is no longer distributed;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1308
2553
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
  1309
2557
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1310
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1311
New in Isabelle94-4
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1312
-------------------
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1313
2747
9fdc1461085f Tidied and updated
paulson
parents: 2732
diff changeset
  1314
* greatly reduced space requirements;
2557
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1315
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1316
* theory files (.thy) no longer require \...\ escapes at line breaks;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1317
5726
wenzelm
parents: 5722
diff changeset
  1318
* searchable theorem database (see the section "Retrieving theorems" on
2557
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1319
page 8 of the Reference Manual);
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1320
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1321
* new examples, including Grabczewski's monumental case study of the
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1322
Axiom of Choice;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1323
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1324
* The previous version of HOL renamed to Old_HOL;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1325
5726
wenzelm
parents: 5722
diff changeset
  1326
* The new version of HOL (previously called CHOL) uses a curried syntax
2557
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1327
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
  1328
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1329
* Mutually recursive inductive definitions finally work in HOL;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1330
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1331
* 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
  1332
translates to the operator "split";
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1333
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1334
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1335
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1336
New in Isabelle94-3
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1337
-------------------
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1338
5726
wenzelm
parents: 5722
diff changeset
  1339
* new infix operator, addss, allowing the classical reasoner to
2557
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1340
perform simplification at each step of its search.  Example:
5726
wenzelm
parents: 5722
diff changeset
  1341
        fast_tac (cs addss ss)
2557
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1342
5726
wenzelm
parents: 5722
diff changeset
  1343
* a new logic, CHOL, the same as HOL, but with a curried syntax
wenzelm
parents: 5722
diff changeset
  1344
for functions.  Application looks like f a b instead of f(a,b).  Also pairs
2557
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1345
look like (a,b) instead of <a,b>;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1346
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1347
* PLEASE NOTE: CHOL will eventually replace HOL!
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1348
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1349
* 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
  1350
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
  1351
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1352
* In ZF, integer numerals now denote two's-complement binary integers.
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1353
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
  1354
5726
wenzelm
parents: 5722
diff changeset
  1355
* Many new examples: I/O automata, Church-Rosser theorem, equivalents
2557
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1356
of the Axiom of Choice;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1357
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1358
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1359
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1360
New in Isabelle94-2
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1361
-------------------
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1362
5726
wenzelm
parents: 5722
diff changeset
  1363
* Significantly faster resolution;
2557
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1364
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1365
* 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
  1366
freely;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1367
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1368
* Database of theorems for FOL, HOL and ZF.  New
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1369
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
  1370
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1371
* 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
  1372
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
  1373
(theory_of_thm);
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1374
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1375
* Bugs fixed in the inductive definition and datatype packages;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1376
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1377
* 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
  1378
and HOL_dup_cs obsolete;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1379
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1380
* 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
  1381
have been removed;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1382
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1383
* Simpler definition of function space in ZF;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1384
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1385
* new results about cardinal and ordinal arithmetic in ZF;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1386
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1387
* '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
  1388
types;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1389
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1390
2553
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
  1391
$Id$