NEWS
author wenzelm
Tue, 30 May 2000 16:03:09 +0200
changeset 8999 ad8260dc6e4a
parent 8994 803533fbb3ec
child 9011 0cfc347f8d19
permissions -rw-r--r--
global timing flag;
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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* HOL: exhaust_tac on datatypes superceded by new generic case_tac;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: renamed flags Syntax.trace_norm_ast to Syntax.trace_ast; global
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timing flag supersedes proof_timing and Toplevel.trace;
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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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* 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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selector expression is simplified, but not the remaining arms. To
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   168
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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   176
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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* theory Sexp now in HOL/Induct examples (used to be part of main HOL,
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   185
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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8412
65f9089f6f71 cases_tac
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8358
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*** General ***
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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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8994
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* ML: renamed flags Syntax.trace_norm_ast to Syntax.trace_ast; global
803533fbb3ec * ML: renamed flags Syntax.trace_norm_ast to Syntax.trace_ast; global
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timing flag supersedes proof_timing and Toplevel.trace;
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* ML: new combinators |>> and |>>> for incremental transformations
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   203
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)
f5c5b81b3f14 integer division
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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
7215
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   216
    Delcongs [if_weak_cong];
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   217
6269
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* HOL: Removed the obsolete syntax "Compl A"; use -A for set
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   219
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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7847
5a3fa0c4b215 Eliminated mutual_induct_tac.
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* HOL/datatype: mutual_induct_tac no longer exists --
5a3fa0c4b215 Eliminated mutual_induct_tac.
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  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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   227
arguments now have to occur explicitly on the rhs as type constraints;
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diff changeset
   228
6269
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* ZF: The con_defs part of an inductive definition may no longer refer
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   230
to constants declared in the same theory;
6057
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6269
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* HOL, ZF: the function mk_cases, generated by the inductive
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   233
definition package, has lost an argument.  To simplify its result, it
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   234
uses the default simpset instead of a supplied list of theorems.
6141
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* HOL/List: the constructors of type list are now Nil and Cons;
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7619
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* Simplifier: the type of the infix ML functions
8729
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        setSSolver addSSolver setSolver addSolver
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   240
is now  simpset * solver -> simpset  where `solver' is a new abstract type
d78b8b103fd9 incompatibility solver
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   241
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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        mk_solver: string -> (thm list -> int -> tactic) -> solver
7619
d78b8b103fd9 incompatibility solver
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where the string argument is only a comment.
6057
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7647
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6069
a99879bd9f13 if-then-else syntax for ZF
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   246
*** Proof tools ***
a99879bd9f13 if-then-else syntax for ZF
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6343
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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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types `nat', `int', and `real' in HOL (see below); it can, should and
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will be instantiated for other types and logics as well.
6069
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7324
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* 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
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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
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6014
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*** General ***
bfd4923b0957 locales
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diff changeset
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* New Isabelle/Isar subsystem provides an alternative to traditional
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tactical theorem proving; together with the ProofGeneral/isar user
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   263
interface it offers an interactive environment for developing human
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   264
readable proof documents (Isar == Intelligible semi-automated
7886
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diff changeset
   265
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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8fa551e22e52 the settings environment is now statically scoped;
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diff changeset
   268
* improved presentation of theories: better HTML markup (including
8fa551e22e52 the settings environment is now statically scoped;
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   269
colors), graph views in several sizes; isatool usedir now provides a
8fa551e22e52 the settings environment is now statically scoped;
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proper interface for user theories (via -P option); actual document
8fa551e22e52 the settings environment is now statically scoped;
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preparation based on (PDF)LaTeX is available as well (for new-style
8fa551e22e52 the settings environment is now statically scoped;
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theories only); see isatool doc system for more information;
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7252
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* native support for Proof General, both for classic Isabelle and
7986
9d319a76dbeb Isabelle99;
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Isabelle/Isar;
7215
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7791
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* ML function thm_deps visualizes dependencies of theorems and lemmas,
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using the graph browser tool;
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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
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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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add_path, del_path, reset_path functions; new operations such as
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   285
update_thy, touch_thy, remove_thy, use/update_thy_only (see also
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diff changeset
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isatool doc ref);
6449
d031cb5ea2fc loadpath replaced;
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diff changeset
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* improved isatool install: option -k creates KDE application icon,
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option -p DIR installs standalone binaries;
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* added ML_PLATFORM setting (useful for cross-platform installations);
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more robust handling of platform specific ML images for SML/NJ;
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7886
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* the settings environment is now statically scoped, i.e. it is never
7986
9d319a76dbeb Isabelle99;
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   295
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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* path element specification '~~' refers to '$ISABELLE_HOME';
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* in locales, the "assumes" and "defines" parts may be omitted if
97c697a32b73 updated;
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empty;
5973
040f6d2af50d removed prs / prs_fn;
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6269
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* new print_mode "xsymbols" for extended symbol support (e.g. genuine
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long arrows);
6259
488bdc1bd11a path element specification '~~' refers to '$ISABELLE_HOME';
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6343
97c697a32b73 updated;
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* new print_mode "HTML";
97c697a32b73 updated;
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97c697a32b73 updated;
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   308
* new flag show_tags controls display of tags of theorems (which are
97c697a32b73 updated;
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diff changeset
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basically just comments that may be attached by some tools);
97c697a32b73 updated;
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6461
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* Isamode 2.6 requires patch to accomodate change of Isabelle font
99c34e50a2c6 Isamode 2.6 requires patch;
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mode and goal output format:
99c34e50a2c6 Isamode 2.6 requires patch;
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99c34e50a2c6 Isamode 2.6 requires patch;
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diff -r Isamode-2.6/elisp/isa-load.el Isamode/elisp/isa-load.el
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244c244
99c34e50a2c6 Isamode 2.6 requires patch;
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<       (list (isa-getenv "ISABELLE") "-msymbols" logic-name)
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---
6533
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>       (list (isa-getenv "ISABELLE") "-misabelle_font" "-msymbols" logic-name)
6461
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diff -r Isabelle-2.6/elisp/isa-proofstate.el Isamode/elisp/isa-proofstate.el
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181c181
99c34e50a2c6 Isamode 2.6 requires patch;
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   321
< (defconst proofstate-proofstart-regexp "^Level [0-9]+$"
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diff changeset
   322
---
99c34e50a2c6 Isamode 2.6 requires patch;
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   323
> (defconst proofstate-proofstart-regexp "^Level [0-9]+"
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7450
e329ca03fd00 added bind_thms;
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   325
* function bind_thms stores lists of theorems (cf. bind_thm);
e329ca03fd00 added bind_thms;
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   326
7593
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* new shorthand tactics ftac, eatac, datac, fatac;
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   328
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   329
* qed (and friends) now accept "" as result name; in that case the
7986
9d319a76dbeb Isabelle99;
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   330
theorem is not stored, but proper checks and presentation of the
9d319a76dbeb Isabelle99;
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   331
result still apply;
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diff changeset
   332
7805
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diff changeset
   333
* theorem database now also indexes constants "Trueprop", "all",
0ae9ddc36fe0 theorem database now also indexes constants "Trueprop", "all",
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diff changeset
   334
"==>", "=="; thus thms_containing, findI etc. may retrieve more rules;
0ae9ddc36fe0 theorem database now also indexes constants "Trueprop", "all",
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diff changeset
   335
6028
1bfd52528bde *** empty log message ***
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6057
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*** HOL ***
395ea7617554 *** empty log message ***
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7215
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** HOL arithmetic **
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6343
97c697a32b73 updated;
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diff changeset
   341
* There are now decision procedures for linear arithmetic over nat and
97c697a32b73 updated;
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diff changeset
   342
int:
6131
2d9e609abcdb More Arith.
nipkow
parents: 6070
diff changeset
   343
6343
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   344
1. arith_tac copes with arbitrary formulae involving `=', `<', `<=',
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   345
`+', `-', `Suc', `min', `max' and numerical constants; other subterms
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   346
are treated as atomic; subformulae not involving type `nat' or `int'
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   347
are ignored; quantified subformulae are ignored unless they are
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   348
positive universal or negative existential. The tactic has to be
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   349
invoked by hand and can be a little bit slow. In particular, the
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   350
running time is exponential in the number of occurrences of `min' and
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   351
`max', and `-' on `nat'.
6131
2d9e609abcdb More Arith.
nipkow
parents: 6070
diff changeset
   352
6343
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   353
2. fast_arith_tac is a cut-down version of arith_tac: it only takes
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   354
(negated) (in)equalities among the premises and the conclusion into
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   355
account (i.e. no compound formulae) and does not know about `min' and
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   356
`max', and `-' on `nat'. It is fast and is used automatically by the
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   357
simplifier.
6131
2d9e609abcdb More Arith.
nipkow
parents: 6070
diff changeset
   358
6343
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   359
NB: At the moment, these decision procedures do not cope with mixed
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   360
nat/int formulae where the two parts interact, such as `m < n ==>
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   361
int(m) < int(n)'.
6028
1bfd52528bde *** empty log message ***
oheimb
parents: 6014
diff changeset
   362
7215
wenzelm
parents: 7204
diff changeset
   363
* HOL/Numeral provides a generic theory of numerals (encoded
7313
300487ddfba9 real numerals;
wenzelm
parents: 7300
diff changeset
   364
efficiently as bit strings); setup for types nat/int/real is in place;
7215
wenzelm
parents: 7204
diff changeset
   365
INCOMPATIBILITY: since numeral syntax is now polymorphic, rather than
wenzelm
parents: 7204
diff changeset
   366
int, existing theories and proof scripts may require a few additional
wenzelm
parents: 7204
diff changeset
   367
type constraints;
wenzelm
parents: 7204
diff changeset
   368
wenzelm
parents: 7204
diff changeset
   369
* integer division and remainder can now be performed on constant
wenzelm
parents: 7204
diff changeset
   370
arguments;
7157
paulson
parents: 7125
diff changeset
   371
7215
wenzelm
parents: 7204
diff changeset
   372
* many properties of integer multiplication, division and remainder
wenzelm
parents: 7204
diff changeset
   373
are now available;
6922
f5c5b81b3f14 integer division
paulson
parents: 6795
diff changeset
   374
7287
d603a06b30df defer_recdef
paulson
parents: 7280
diff changeset
   375
* An interface to the Stanford Validity Checker (SVC) is available through the
d603a06b30df defer_recdef
paulson
parents: 7280
diff changeset
   376
tactic svc_tac.  Propositional tautologies and theorems of linear arithmetic
d603a06b30df defer_recdef
paulson
parents: 7280
diff changeset
   377
are proved automatically.  SVC must be installed separately, and its results
d603a06b30df defer_recdef
paulson
parents: 7280
diff changeset
   378
must be TAKEN ON TRUST (Isabelle does not check the proofs, but tags any
d603a06b30df defer_recdef
paulson
parents: 7280
diff changeset
   379
invocation of the underlying oracle).  For SVC see
7444
ee17ad649c26 new SVC url
paulson
parents: 7420
diff changeset
   380
  http://verify.stanford.edu/SVC
6922
f5c5b81b3f14 integer division
paulson
parents: 6795
diff changeset
   381
7125
df7cf6e85501 HOL-Real target now builds an actual image;
wenzelm
parents: 7113
diff changeset
   382
* IsaMakefile: the HOL-Real target now builds an actual image;
df7cf6e85501 HOL-Real target now builds an actual image;
wenzelm
parents: 7113
diff changeset
   383
7215
wenzelm
parents: 7204
diff changeset
   384
wenzelm
parents: 7204
diff changeset
   385
** HOL misc **
wenzelm
parents: 7204
diff changeset
   386
7595
5f5d575ddac3 * HOL/Real/HahnBanach: the Hahn-Banach theorem for real vector spaces
wenzelm
parents: 7593
diff changeset
   387
* 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
   388
(in Isabelle/Isar) -- by Gertrud Bauer;
5f5d575ddac3 * HOL/Real/HahnBanach: the Hahn-Banach theorem for real vector spaces
wenzelm
parents: 7593
diff changeset
   389
7691
b7e8277fa088 added BVC;
wenzelm
parents: 7647
diff changeset
   390
* HOL/BCV: generic model of bytecode verification, i.e. data-flow
b7e8277fa088 added BVC;
wenzelm
parents: 7647
diff changeset
   391
analysis for assembly languages with subtypes;
b7e8277fa088 added BVC;
wenzelm
parents: 7647
diff changeset
   392
6278
37b76155a49e Symbol.output subject to print mode;
wenzelm
parents: 6269
diff changeset
   393
* HOL/TLA (Lamport's Temporal Logic of Actions): major reorganization
37b76155a49e Symbol.output subject to print mode;
wenzelm
parents: 6269
diff changeset
   394
-- avoids syntactic ambiguities and treats state, transition, and
37b76155a49e Symbol.output subject to print mode;
wenzelm
parents: 6269
diff changeset
   395
temporal levels more uniformly; introduces INCOMPATIBILITIES due to
37b76155a49e Symbol.output subject to print mode;
wenzelm
parents: 6269
diff changeset
   396
changed syntax and (many) tactics;
37b76155a49e Symbol.output subject to print mode;
wenzelm
parents: 6269
diff changeset
   397
7791
wenzelm
parents: 7780
diff changeset
   398
* HOL/inductive: Now also handles more general introduction rules such
wenzelm
parents: 7780
diff changeset
   399
  as "ALL y. (y, x) : r --> y : acc r ==> x : acc r"; monotonicity
wenzelm
parents: 7780
diff changeset
   400
  theorems are now maintained within the theory (maintained via the
wenzelm
parents: 7780
diff changeset
   401
  "mono" attribute);
7780
099742c562aa Documented changes to HOL/inductive and function thm_deps.
berghofe
parents: 7691
diff changeset
   402
7238
36e58620ffc8 replaced HOL_quantifiers flag by "HOL" print mode;
wenzelm
parents: 7216
diff changeset
   403
* HOL/datatype: Now also handles arbitrarily branching datatypes
36e58620ffc8 replaced HOL_quantifiers flag by "HOL" print mode;
wenzelm
parents: 7216
diff changeset
   404
  (using function types) such as
36e58620ffc8 replaced HOL_quantifiers flag by "HOL" print mode;
wenzelm
parents: 7216
diff changeset
   405
36e58620ffc8 replaced HOL_quantifiers flag by "HOL" print mode;
wenzelm
parents: 7216
diff changeset
   406
  datatype 'a tree = Atom 'a | Branch "nat => 'a tree"
7047
d103b875ef1d Datatype package now handles arbitrarily branching datatypes.
berghofe
parents: 6925
diff changeset
   407
7326
a1555491a966 record_simproc;
wenzelm
parents: 7324
diff changeset
   408
* HOL/record: record_simproc (part of the default simpset) takes care
a1555491a966 record_simproc;
wenzelm
parents: 7324
diff changeset
   409
of selectors applied to updated records; record_split_tac is no longer
7327
wenzelm
parents: 7326
diff changeset
   410
part of the default claset; update_defs may now be removed from the
wenzelm
parents: 7326
diff changeset
   411
simpset in many cases; COMPATIBILITY: old behavior achieved by
7326
a1555491a966 record_simproc;
wenzelm
parents: 7324
diff changeset
   412
a1555491a966 record_simproc;
wenzelm
parents: 7324
diff changeset
   413
  claset_ref () := claset() addSWrapper record_split_wrapper;
a1555491a966 record_simproc;
wenzelm
parents: 7324
diff changeset
   414
  Delsimprocs [record_simproc]
a1555491a966 record_simproc;
wenzelm
parents: 7324
diff changeset
   415
6386
e9e8af97f48f HOL/typedef: fixed type inference for representing set;
wenzelm
parents: 6343
diff changeset
   416
* HOL/typedef: fixed type inference for representing set; type
e9e8af97f48f HOL/typedef: fixed type inference for representing set;
wenzelm
parents: 6343
diff changeset
   417
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
   418
7287
d603a06b30df defer_recdef
paulson
parents: 7280
diff changeset
   419
* HOL/recdef (TFL): 'congs' syntax now expects comma separated list of theorem
d603a06b30df defer_recdef
paulson
parents: 7280
diff changeset
   420
names rather than an ML expression;
d603a06b30df defer_recdef
paulson
parents: 7280
diff changeset
   421
d603a06b30df defer_recdef
paulson
parents: 7280
diff changeset
   422
* HOL/defer_recdef (TFL): like recdef but the well-founded relation can be
d603a06b30df defer_recdef
paulson
parents: 7280
diff changeset
   423
supplied later.  Program schemes can be defined, such as
d603a06b30df defer_recdef
paulson
parents: 7280
diff changeset
   424
    "While B C s = (if B s then While B C (C s) else s)"
d603a06b30df defer_recdef
paulson
parents: 7280
diff changeset
   425
where the well-founded relation can be chosen after B and C have been given.
6563
wenzelm
parents: 6533
diff changeset
   426
7215
wenzelm
parents: 7204
diff changeset
   427
* HOL/List: the constructors of type list are now Nil and Cons;
wenzelm
parents: 7204
diff changeset
   428
INCOMPATIBILITY: while [] and infix # syntax is still there, of
wenzelm
parents: 7204
diff changeset
   429
course, ML tools referring to List.list.op # etc. have to be adapted;
wenzelm
parents: 7204
diff changeset
   430
7238
36e58620ffc8 replaced HOL_quantifiers flag by "HOL" print mode;
wenzelm
parents: 7216
diff changeset
   431
* HOL_quantifiers flag superseded by "HOL" print mode, which is
36e58620ffc8 replaced HOL_quantifiers flag by "HOL" print mode;
wenzelm
parents: 7216
diff changeset
   432
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
   433
the original Gordon/HOL-style output;
36e58620ffc8 replaced HOL_quantifiers flag by "HOL" print mode;
wenzelm
parents: 7216
diff changeset
   434
36e58620ffc8 replaced HOL_quantifiers flag by "HOL" print mode;
wenzelm
parents: 7216
diff changeset
   435
* 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
   436
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
   437
36e58620ffc8 replaced HOL_quantifiers flag by "HOL" print mode;
wenzelm
parents: 7216
diff changeset
   438
* HOL basic syntax simplified (more orthogonal): all variants of
36e58620ffc8 replaced HOL_quantifiers flag by "HOL" print mode;
wenzelm
parents: 7216
diff changeset
   439
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
   440
Eps operator is provided as well: "SOME x. P[x]";
36e58620ffc8 replaced HOL_quantifiers flag by "HOL" print mode;
wenzelm
parents: 7216
diff changeset
   441
7320
e89fd7d0a624 Moved sum_case to theory HOL/Datatype.
berghofe
parents: 7313
diff changeset
   442
* 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
   443
7280
wenzelm
parents: 7261
diff changeset
   444
* HOL/Univ.thy: infix syntax <*>, <+>, <**>, <+> eliminated and made
wenzelm
parents: 7261
diff changeset
   445
thus available for user theories;
wenzelm
parents: 7261
diff changeset
   446
7300
8439bf404c28 * HOLCF/IOA/Sequents: renamed 'Cons' to 'Consq' to avoid clash with HOL/List;
wenzelm
parents: 7287
diff changeset
   447
* 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
   448
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
   449
time;
8439bf404c28 * HOLCF/IOA/Sequents: renamed 'Cons' to 'Consq' to avoid clash with HOL/List;
wenzelm
parents: 7287
diff changeset
   450
7986
9d319a76dbeb Isabelle99;
wenzelm
parents: 7919
diff changeset
   451
* HOL: new tactic smp_tac: int -> int -> tactic, which applies spec
9d319a76dbeb Isabelle99;
wenzelm
parents: 7919
diff changeset
   452
several times and then mp;
7492
44b333fb5b80 *** empty log message ***
oheimb
parents: 7450
diff changeset
   453
7215
wenzelm
parents: 7204
diff changeset
   454
7113
paulson
parents: 7047
diff changeset
   455
*** LK ***
paulson
parents: 7047
diff changeset
   456
7215
wenzelm
parents: 7204
diff changeset
   457
* the notation <<...>> is now available as a notation for sequences of
wenzelm
parents: 7204
diff changeset
   458
formulas;
7113
paulson
parents: 7047
diff changeset
   459
paulson
parents: 7047
diff changeset
   460
* the simplifier is now installed
paulson
parents: 7047
diff changeset
   461
8729
094dbd0fad0c * improved name spaces: ambiguous output is qualified; support for
wenzelm
parents: 8705
diff changeset
   462
* the axiom system has been generalized (thanks to Soren Heilmann)
7113
paulson
parents: 7047
diff changeset
   463
paulson
parents: 7047
diff changeset
   464
* the classical reasoner now has a default rule database
paulson
parents: 7047
diff changeset
   465
paulson
parents: 7047
diff changeset
   466
6064
0786b5afd8ee primrec, induct_tac
paulson
parents: 6063
diff changeset
   467
*** ZF ***
0786b5afd8ee primrec, induct_tac
paulson
parents: 6063
diff changeset
   468
0786b5afd8ee primrec, induct_tac
paulson
parents: 6063
diff changeset
   469
* new primrec section allows primitive recursive functions to be given
6269
wenzelm
parents: 6259
diff changeset
   470
directly (as in HOL) over datatypes and the natural numbers;
6064
0786b5afd8ee primrec, induct_tac
paulson
parents: 6063
diff changeset
   471
6269
wenzelm
parents: 6259
diff changeset
   472
* new tactics induct_tac and exhaust_tac for induction (or case
wenzelm
parents: 6259
diff changeset
   473
analysis) over datatypes and the natural numbers;
6064
0786b5afd8ee primrec, induct_tac
paulson
parents: 6063
diff changeset
   474
0786b5afd8ee primrec, induct_tac
paulson
parents: 6063
diff changeset
   475
* the datatype declaration of type T now defines the recursor T_rec;
0786b5afd8ee primrec, induct_tac
paulson
parents: 6063
diff changeset
   476
6141
a6922171b396 removal of the (thm list) argument of mk_cases
paulson
parents: 6131
diff changeset
   477
* simplification automatically does freeness reasoning for datatype
6269
wenzelm
parents: 6259
diff changeset
   478
constructors;
6141
a6922171b396 removal of the (thm list) argument of mk_cases
paulson
parents: 6131
diff changeset
   479
6269
wenzelm
parents: 6259
diff changeset
   480
* automatic type-inference, with AddTCs command to insert new
wenzelm
parents: 6259
diff changeset
   481
type-checking rules;
6155
e387d188d0ca ZF typechecking
paulson
parents: 6141
diff changeset
   482
6269
wenzelm
parents: 6259
diff changeset
   483
* datatype introduction rules are now added as Safe Introduction rules
wenzelm
parents: 6259
diff changeset
   484
to the claset;
6155
e387d188d0ca ZF typechecking
paulson
parents: 6141
diff changeset
   485
6269
wenzelm
parents: 6259
diff changeset
   486
* the syntax "if P then x else y" is now available in addition to
wenzelm
parents: 6259
diff changeset
   487
if(P,x,y);
wenzelm
parents: 6259
diff changeset
   488
6069
a99879bd9f13 if-then-else syntax for ZF
paulson
parents: 6064
diff changeset
   489
6343
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   490
*** Internal programming interfaces ***
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   491
7919
35c18affc1d8 tuned simplifier trace output; new flag debug_simp
wenzelm
parents: 7886
diff changeset
   492
* tuned simplifier trace output; new flag debug_simp;
35c18affc1d8 tuned simplifier trace output; new flag debug_simp
wenzelm
parents: 7886
diff changeset
   493
7420
cba45c114f3b structures Vartab / Termtab (instances of TableFun);
wenzelm
parents: 7327
diff changeset
   494
* structures Vartab / Termtab (instances of TableFun) offer efficient
cba45c114f3b structures Vartab / Termtab (instances of TableFun);
wenzelm
parents: 7327
diff changeset
   495
tables indexed by indexname_ord / term_ord (compatible with aconv);
cba45c114f3b structures Vartab / Termtab (instances of TableFun);
wenzelm
parents: 7327
diff changeset
   496
6386
e9e8af97f48f HOL/typedef: fixed type inference for representing set;
wenzelm
parents: 6343
diff changeset
   497
* AxClass.axclass_tac lost the theory argument;
e9e8af97f48f HOL/typedef: fixed type inference for representing set;
wenzelm
parents: 6343
diff changeset
   498
6343
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   499
* tuned current_goals_markers semantics: begin / end goal avoids
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   500
printing empty lines;
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   501
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   502
* removed prs and prs_fn hook, which was broken because it did not
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   503
include \n in its semantics, forcing writeln to add one
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   504
uncoditionally; replaced prs_fn by writeln_fn; consider std_output:
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   505
string -> unit if you really want to output text without newline;
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   506
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   507
* Symbol.output subject to print mode; INCOMPATIBILITY: defaults to
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   508
plain output, interface builders may have to enable 'isabelle_font'
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   509
mode to get Isabelle font glyphs as before;
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   510
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   511
* refined token_translation interface; INCOMPATIBILITY: output length
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   512
now of type real instead of int;
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   513
7196
c8d1002060e8 theory loader actions;
wenzelm
parents: 7157
diff changeset
   514
* theory loader actions may be traced via new ThyInfo.add_hook
c8d1002060e8 theory loader actions;
wenzelm
parents: 7157
diff changeset
   515
interface (see src/Pure/Thy/thy_info.ML); example application: keep
c8d1002060e8 theory loader actions;
wenzelm
parents: 7157
diff changeset
   516
your own database of information attached to *whole* theories -- as
c8d1002060e8 theory loader actions;
wenzelm
parents: 7157
diff changeset
   517
opposed to intra-theory data slots offered via TheoryDataFun;
c8d1002060e8 theory loader actions;
wenzelm
parents: 7157
diff changeset
   518
7647
2ceddd91cd0a proper handling of dangling sort hypotheses (at last!);
wenzelm
parents: 7619
diff changeset
   519
* proper handling of dangling sort hypotheses (at last!);
2ceddd91cd0a proper handling of dangling sort hypotheses (at last!);
wenzelm
parents: 7619
diff changeset
   520
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
   521
extra sort hypotheses that can be witnessed from the type signature;
7986
9d319a76dbeb Isabelle99;
wenzelm
parents: 7919
diff changeset
   522
the force_strip_shyps flag is gone, any remaining shyps are simply
9d319a76dbeb Isabelle99;
wenzelm
parents: 7919
diff changeset
   523
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
   524
6343
97c697a32b73 updated;
wenzelm
parents: 6278
diff changeset
   525
6064
0786b5afd8ee primrec, induct_tac
paulson
parents: 6063
diff changeset
   526
5781
d37380544c39 tuned current_goals_markers;
wenzelm
parents: 5731
diff changeset
   527
New in Isabelle98-1 (October 1998)
d37380544c39 tuned current_goals_markers;
wenzelm
parents: 5731
diff changeset
   528
----------------------------------
d37380544c39 tuned current_goals_markers;
wenzelm
parents: 5731
diff changeset
   529
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   530
*** Overview of INCOMPATIBILITIES (see below for more details) ***
4842
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
   531
5726
wenzelm
parents: 5722
diff changeset
   532
* several changes of automated proof tools;
5373
wenzelm
parents: 5363
diff changeset
   533
5726
wenzelm
parents: 5722
diff changeset
   534
* HOL: major changes to the inductive and datatype packages, including
wenzelm
parents: 5722
diff changeset
   535
some minor incompatibilities of theory syntax;
5214
75c6392d1274 Adapted to new datatype package.
berghofe
parents: 5207
diff changeset
   536
5726
wenzelm
parents: 5722
diff changeset
   537
* HOL: renamed r^-1 to 'converse' from 'inverse'; 'inj_onto' is now
5217
wenzelm
parents: 5214
diff changeset
   538
called `inj_on';
5160
1ff6679144b9 ZF: Main, Update
paulson
parents: 5145
diff changeset
   539
5275
de5d5e5eb692 *** empty log message ***
nipkow
parents: 5267
diff changeset
   540
* HOL: removed duplicate thms in Arith:
de5d5e5eb692 *** empty log message ***
nipkow
parents: 5267
diff changeset
   541
  less_imp_add_less  should be replaced by  trans_less_add1
de5d5e5eb692 *** empty log message ***
nipkow
parents: 5267
diff changeset
   542
  le_imp_add_le      should be replaced by  trans_le_add1
5160
1ff6679144b9 ZF: Main, Update
paulson
parents: 5145
diff changeset
   543
5726
wenzelm
parents: 5722
diff changeset
   544
* HOL: unary minus is now overloaded (new type constraints may be
wenzelm
parents: 5722
diff changeset
   545
required);
5490
85855f65d0c6 From Compl(A) to -A
paulson
parents: 5475
diff changeset
   546
5726
wenzelm
parents: 5722
diff changeset
   547
* HOL and ZF: unary minus for integers is now #- instead of #~.  In
wenzelm
parents: 5722
diff changeset
   548
ZF, expressions such as n#-1 must be changed to n#- 1, since #-1 is
wenzelm
parents: 5722
diff changeset
   549
now taken as an integer constant.
5541
f8fb27db4bcd unary minus
paulson
parents: 5526
diff changeset
   550
5726
wenzelm
parents: 5722
diff changeset
   551
* Pure: ML function 'theory_of' renamed to 'theory';
5397
034ed25535b9 * Pure: ML function 'theory_of' replaced by 'theory';
wenzelm
parents: 5373
diff changeset
   552
5363
0cf15843b82f isatool install;
wenzelm
parents: 5332
diff changeset
   553
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   554
*** Proof tools ***
4880
312115d20c45 *** empty log message ***
nipkow
parents: 4879
diff changeset
   555
5657
1a6c9c6a3f8e 2. The simplifier now knows a little bit about nat-arithmetic.
nipkow
parents: 5651
diff changeset
   556
* Simplifier:
1a6c9c6a3f8e 2. The simplifier now knows a little bit about nat-arithmetic.
nipkow
parents: 5651
diff changeset
   557
  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
   558
     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
   559
        simplify.
1a6c9c6a3f8e 2. The simplifier now knows a little bit about nat-arithmetic.
nipkow
parents: 5651
diff changeset
   560
     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
   561
        rotate premises to achieve further simplification.
1a6c9c6a3f8e 2. The simplifier now knows a little bit about nat-arithmetic.
nipkow
parents: 5651
diff changeset
   562
     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
   563
     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
   564
  2. The simplifier now knows a little bit about nat-arithmetic.
4880
312115d20c45 *** empty log message ***
nipkow
parents: 4879
diff changeset
   565
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   566
* Classical reasoner: wrapper mechanism for the classical reasoner now
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   567
allows for selected deletion of wrappers, by introduction of names for
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   568
wrapper functionals.  This implies that addbefore, addSbefore,
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   569
addaltern, and addSaltern now take a pair (name, tactic) as argument,
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   570
and that adding two tactics with the same name overwrites the first
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   571
one (emitting a warning).
4824
df8fc4626a9e *** empty log message ***
oheimb
parents: 4806
diff changeset
   572
  type wrapper = (int -> tactic) -> (int -> tactic)
4649
89ad3eb863a1 changed wrapper mechanism of classical reasoner
oheimb
parents: 4575
diff changeset
   573
  setWrapper, setSWrapper, compWrapper and compSWrapper are replaced by
4824
df8fc4626a9e *** empty log message ***
oheimb
parents: 4806
diff changeset
   574
  addWrapper, addSWrapper: claset * (string * wrapper) -> claset
df8fc4626a9e *** empty log message ***
oheimb
parents: 4806
diff changeset
   575
  delWrapper, delSWrapper: claset *  string            -> claset
4649
89ad3eb863a1 changed wrapper mechanism of classical reasoner
oheimb
parents: 4575
diff changeset
   576
  getWrapper is renamed to appWrappers, getSWrapper to appSWrappers;
89ad3eb863a1 changed wrapper mechanism of classical reasoner
oheimb
parents: 4575
diff changeset
   577
5705
56f2030c46c6 tuned (all proofs are INSTABLE by David's definition of instability);
wenzelm
parents: 5671
diff changeset
   578
* Classical reasoner: addbefore/addSbefore now have APPEND/ORELSE
5726
wenzelm
parents: 5722
diff changeset
   579
semantics; addbefore now affects only the unsafe part of step_tac
wenzelm
parents: 5722
diff changeset
   580
etc.; this affects addss/auto_tac/force_tac, so EXISTING PROOFS MAY
wenzelm
parents: 5722
diff changeset
   581
FAIL, but proofs should be fixable easily, e.g. by replacing Auto_tac
wenzelm
parents: 5722
diff changeset
   582
by Force_tac;
5524
38f2a518a811 *** empty log message ***
oheimb
parents: 5490
diff changeset
   583
5726
wenzelm
parents: 5722
diff changeset
   584
* Classical reasoner: setwrapper to setWrapper and compwrapper to
wenzelm
parents: 5722
diff changeset
   585
compWrapper; added safe wrapper (and access functions for it);
5524
38f2a518a811 *** empty log message ***
oheimb
parents: 5490
diff changeset
   586
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   587
* HOL/split_all_tac is now much faster and fails if there is nothing
5726
wenzelm
parents: 5722
diff changeset
   588
to split.  Some EXISTING PROOFS MAY REQUIRE ADAPTION because the order
wenzelm
parents: 5722
diff changeset
   589
and the names of the automatically generated variables have changed.
wenzelm
parents: 5722
diff changeset
   590
split_all_tac has moved within claset() from unsafe wrappers to safe
wenzelm
parents: 5722
diff changeset
   591
wrappers, which means that !!-bound variables are split much more
wenzelm
parents: 5722
diff changeset
   592
aggressively, and safe_tac and clarify_tac now split such variables.
wenzelm
parents: 5722
diff changeset
   593
If this splitting is not appropriate, use delSWrapper "split_all_tac".
wenzelm
parents: 5722
diff changeset
   594
Note: the same holds for record_split_tac, which does the job of
wenzelm
parents: 5722
diff changeset
   595
split_all_tac for record fields.
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   596
5726
wenzelm
parents: 5722
diff changeset
   597
* HOL/Simplifier: Rewrite rules for case distinctions can now be added
wenzelm
parents: 5722
diff changeset
   598
permanently to the default simpset using Addsplits just like
wenzelm
parents: 5722
diff changeset
   599
Addsimps. They can be removed via Delsplits just like
wenzelm
parents: 5722
diff changeset
   600
Delsimps. Lower-case versions are also available.
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   601
5726
wenzelm
parents: 5722
diff changeset
   602
* HOL/Simplifier: The rule split_if is now part of the default
wenzelm
parents: 5722
diff changeset
   603
simpset. This means that the simplifier will eliminate all occurrences
wenzelm
parents: 5722
diff changeset
   604
of if-then-else in the conclusion of a goal. To prevent this, you can
wenzelm
parents: 5722
diff changeset
   605
either remove split_if completely from the default simpset by
wenzelm
parents: 5722
diff changeset
   606
`Delsplits [split_if]' or remove it in a specific call of the
wenzelm
parents: 5722
diff changeset
   607
simplifier using `... delsplits [split_if]'.  You can also add/delete
wenzelm
parents: 5722
diff changeset
   608
other case splitting rules to/from the default simpset: every datatype
wenzelm
parents: 5722
diff changeset
   609
generates suitable rules `split_t_case' and `split_t_case_asm' (where
wenzelm
parents: 5722
diff changeset
   610
t is the name of the datatype).
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   611
5726
wenzelm
parents: 5722
diff changeset
   612
* Classical reasoner / Simplifier combination: new force_tac (and
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   613
derivatives Force_tac, force) combines rewriting and classical
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   614
reasoning (and whatever other tools) similarly to auto_tac, but is
5726
wenzelm
parents: 5722
diff changeset
   615
aimed to solve the given subgoal completely.
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   616
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   617
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   618
*** General ***
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   619
5217
wenzelm
parents: 5214
diff changeset
   620
* new top-level commands `Goal' and `Goalw' that improve upon `goal'
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   621
and `goalw': the theory is no longer needed as an explicit argument -
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   622
the current theory context is used; assumptions are no longer returned
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   623
at the ML-level unless one of them starts with ==> or !!; it is
5217
wenzelm
parents: 5214
diff changeset
   624
recommended to convert to these new commands using isatool fixgoal
wenzelm
parents: 5214
diff changeset
   625
(backup your sources first!);
4842
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
   626
5217
wenzelm
parents: 5214
diff changeset
   627
* new top-level commands 'thm' and 'thms' for retrieving theorems from
5207
wenzelm
parents: 5160
diff changeset
   628
the current theory context, and 'theory' to lookup stored theories;
4806
79cc986bc4d7 bug fixes
paulson
parents: 4801
diff changeset
   629
5722
c669e2161b08 locales
paulson
parents: 5710
diff changeset
   630
* new theory section 'locale' for declaring constants, assumptions and
c669e2161b08 locales
paulson
parents: 5710
diff changeset
   631
definitions that have local scope;
c669e2161b08 locales
paulson
parents: 5710
diff changeset
   632
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   633
* new theory section 'nonterminals' for purely syntactic types;
4858
4b15e9e1b3a5 new theory section 'nonterminals';
wenzelm
parents: 4842
diff changeset
   634
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   635
* new theory section 'setup' for generic ML setup functions
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   636
(e.g. package initialization);
4869
f3d30c02c1db new theory section 'setup';
wenzelm
parents: 4858
diff changeset
   637
5131
dd4ac220b8b4 the distribution now includes Isabelle icons: see
wenzelm
parents: 5128
diff changeset
   638
* the distribution now includes Isabelle icons: see
dd4ac220b8b4 the distribution now includes Isabelle icons: see
wenzelm
parents: 5128
diff changeset
   639
lib/logo/isabelle-{small,tiny}.xpm;
dd4ac220b8b4 the distribution now includes Isabelle icons: see
wenzelm
parents: 5128
diff changeset
   640
5363
0cf15843b82f isatool install;
wenzelm
parents: 5332
diff changeset
   641
* isatool install - install binaries with absolute references to
0cf15843b82f isatool install;
wenzelm
parents: 5332
diff changeset
   642
ISABELLE_HOME/bin;
0cf15843b82f isatool install;
wenzelm
parents: 5332
diff changeset
   643
5572
53c6ea1e6d94 isatool logo;
wenzelm
parents: 5541
diff changeset
   644
* isatool logo -- create instances of the Isabelle logo (as EPS);
53c6ea1e6d94 isatool logo;
wenzelm
parents: 5541
diff changeset
   645
5407
b450fea6d70c * print mode 'emacs' reserved for Isamode;
wenzelm
parents: 5397
diff changeset
   646
* print mode 'emacs' reserved for Isamode;
b450fea6d70c * print mode 'emacs' reserved for Isamode;
wenzelm
parents: 5397
diff changeset
   647
5726
wenzelm
parents: 5722
diff changeset
   648
* support multiple print (ast) translations per constant name;
wenzelm
parents: 5722
diff changeset
   649
6925
8d4d45ec6a3d theorems involving oracles are now printed with a suffixed [!];
wenzelm
parents: 6922
diff changeset
   650
* theorems involving oracles are now printed with a suffixed [!];
8d4d45ec6a3d theorems involving oracles are now printed with a suffixed [!];
wenzelm
parents: 6922
diff changeset
   651
4711
75a9ef36b1fe removed pred;
wenzelm
parents: 4683
diff changeset
   652
4661
paulson
parents: 4655
diff changeset
   653
*** HOL ***
paulson
parents: 4655
diff changeset
   654
5710
wenzelm
parents: 5709
diff changeset
   655
* there is now a tutorial on Isabelle/HOL (do 'isatool doc tutorial');
5709
35b07f8e67b6 Tutorial
nipkow
parents: 5705
diff changeset
   656
5217
wenzelm
parents: 5214
diff changeset
   657
* HOL/inductive package reorganized and improved: now supports mutual
5267
41a01176b9de disjointness
paulson
parents: 5251
diff changeset
   658
definitions such as
5217
wenzelm
parents: 5214
diff changeset
   659
wenzelm
parents: 5214
diff changeset
   660
  inductive EVEN ODD
wenzelm
parents: 5214
diff changeset
   661
    intrs
wenzelm
parents: 5214
diff changeset
   662
      null "0 : EVEN"
wenzelm
parents: 5214
diff changeset
   663
      oddI "n : EVEN ==> Suc n : ODD"
wenzelm
parents: 5214
diff changeset
   664
      evenI "n : ODD ==> Suc n : EVEN"
wenzelm
parents: 5214
diff changeset
   665
wenzelm
parents: 5214
diff changeset
   666
new theorem list "elims" contains an elimination rule for each of the
wenzelm
parents: 5214
diff changeset
   667
recursive sets; inductive definitions now handle disjunctive premises
wenzelm
parents: 5214
diff changeset
   668
correctly (also ZF);
5214
75c6392d1274 Adapted to new datatype package.
berghofe
parents: 5207
diff changeset
   669
5217
wenzelm
parents: 5214
diff changeset
   670
INCOMPATIBILITIES: requires Inductive as an ancestor; component
wenzelm
parents: 5214
diff changeset
   671
"mutual_induct" no longer exists - the induction rule is always
wenzelm
parents: 5214
diff changeset
   672
contained in "induct";
wenzelm
parents: 5214
diff changeset
   673
wenzelm
parents: 5214
diff changeset
   674
wenzelm
parents: 5214
diff changeset
   675
* HOL/datatype package re-implemented and greatly improved: now
5267
41a01176b9de disjointness
paulson
parents: 5251
diff changeset
   676
supports mutually recursive datatypes such as
5217
wenzelm
parents: 5214
diff changeset
   677
wenzelm
parents: 5214
diff changeset
   678
  datatype
wenzelm
parents: 5214
diff changeset
   679
    'a aexp = IF_THEN_ELSE ('a bexp) ('a aexp) ('a aexp)
wenzelm
parents: 5214
diff changeset
   680
            | SUM ('a aexp) ('a aexp)
wenzelm
parents: 5214
diff changeset
   681
            | DIFF ('a aexp) ('a aexp)
wenzelm
parents: 5214
diff changeset
   682
            | NUM 'a
wenzelm
parents: 5214
diff changeset
   683
  and
wenzelm
parents: 5214
diff changeset
   684
    'a bexp = LESS ('a aexp) ('a aexp)
wenzelm
parents: 5214
diff changeset
   685
            | AND ('a bexp) ('a bexp)
wenzelm
parents: 5214
diff changeset
   686
            | OR ('a bexp) ('a bexp)
wenzelm
parents: 5214
diff changeset
   687
5267
41a01176b9de disjointness
paulson
parents: 5251
diff changeset
   688
as well as indirectly recursive datatypes such as
5214
75c6392d1274 Adapted to new datatype package.
berghofe
parents: 5207
diff changeset
   689
5217
wenzelm
parents: 5214
diff changeset
   690
  datatype
wenzelm
parents: 5214
diff changeset
   691
    ('a, 'b) term = Var 'a
wenzelm
parents: 5214
diff changeset
   692
                  | App 'b ((('a, 'b) term) list)
5214
75c6392d1274 Adapted to new datatype package.
berghofe
parents: 5207
diff changeset
   693
5217
wenzelm
parents: 5214
diff changeset
   694
The new tactic  mutual_induct_tac [<var_1>, ..., <var_n>] i  performs
wenzelm
parents: 5214
diff changeset
   695
induction on mutually / indirectly recursive datatypes.
wenzelm
parents: 5214
diff changeset
   696
wenzelm
parents: 5214
diff changeset
   697
Primrec equations are now stored in theory and can be accessed via
wenzelm
parents: 5214
diff changeset
   698
<function_name>.simps.
wenzelm
parents: 5214
diff changeset
   699
wenzelm
parents: 5214
diff changeset
   700
INCOMPATIBILITIES:
5214
75c6392d1274 Adapted to new datatype package.
berghofe
parents: 5207
diff changeset
   701
5217
wenzelm
parents: 5214
diff changeset
   702
  - Theories using datatypes must now have theory Datatype as an
wenzelm
parents: 5214
diff changeset
   703
    ancestor.
wenzelm
parents: 5214
diff changeset
   704
  - The specific <typename>.induct_tac no longer exists - use the
wenzelm
parents: 5214
diff changeset
   705
    generic induct_tac instead.
5226
89934cd022a9 Replaced nat.exhaustion by nat.exhaust
berghofe
parents: 5217
diff changeset
   706
  - natE has been renamed to nat.exhaust - use exhaust_tac
5217
wenzelm
parents: 5214
diff changeset
   707
    instead of res_inst_tac ... natE. Note that the variable
5226
89934cd022a9 Replaced nat.exhaustion by nat.exhaust
berghofe
parents: 5217
diff changeset
   708
    names in nat.exhaust differ from the names in natE, this
5217
wenzelm
parents: 5214
diff changeset
   709
    may cause some "fragile" proofs to fail.
wenzelm
parents: 5214
diff changeset
   710
  - The theorems split_<typename>_case and split_<typename>_case_asm
wenzelm
parents: 5214
diff changeset
   711
    have been renamed to <typename>.split and <typename>.split_asm.
wenzelm
parents: 5214
diff changeset
   712
  - Since default sorts of type variables are now handled correctly,
wenzelm
parents: 5214
diff changeset
   713
    some datatype definitions may have to be annotated with explicit
wenzelm
parents: 5214
diff changeset
   714
    sort constraints.
wenzelm
parents: 5214
diff changeset
   715
  - Primrec definitions no longer require function name and type
wenzelm
parents: 5214
diff changeset
   716
    of recursive argument.
5214
75c6392d1274 Adapted to new datatype package.
berghofe
parents: 5207
diff changeset
   717
5217
wenzelm
parents: 5214
diff changeset
   718
Consider using isatool fixdatatype to adapt your theories and proof
wenzelm
parents: 5214
diff changeset
   719
scripts to the new package (backup your sources first!).
wenzelm
parents: 5214
diff changeset
   720
wenzelm
parents: 5214
diff changeset
   721
5726
wenzelm
parents: 5722
diff changeset
   722
* HOL/record package: considerably improved implementation; now
wenzelm
parents: 5722
diff changeset
   723
includes concrete syntax for record types, terms, updates; theorems
wenzelm
parents: 5722
diff changeset
   724
for surjective pairing and splitting !!-bound record variables; proof
wenzelm
parents: 5722
diff changeset
   725
support is as follows:
wenzelm
parents: 5722
diff changeset
   726
wenzelm
parents: 5722
diff changeset
   727
  1) standard conversions (selectors or updates applied to record
wenzelm
parents: 5722
diff changeset
   728
constructor terms) are part of the standard simpset;
wenzelm
parents: 5722
diff changeset
   729
wenzelm
parents: 5722
diff changeset
   730
  2) inject equations of the form ((x, y) = (x', y')) == x=x' & y=y' are
wenzelm
parents: 5722
diff changeset
   731
made part of standard simpset and claset via addIffs;
wenzelm
parents: 5722
diff changeset
   732
wenzelm
parents: 5722
diff changeset
   733
  3) a tactic for record field splitting (record_split_tac) is part of
wenzelm
parents: 5722
diff changeset
   734
the standard claset (addSWrapper);
wenzelm
parents: 5722
diff changeset
   735
wenzelm
parents: 5722
diff changeset
   736
To get a better idea about these rules you may retrieve them via
wenzelm
parents: 5722
diff changeset
   737
something like 'thms "foo.simps"' or 'thms "foo.iffs"', where "foo" is
wenzelm
parents: 5722
diff changeset
   738
the name of your record type.
wenzelm
parents: 5722
diff changeset
   739
wenzelm
parents: 5722
diff changeset
   740
The split tactic 3) conceptually simplifies by the following rule:
wenzelm
parents: 5722
diff changeset
   741
wenzelm
parents: 5722
diff changeset
   742
  "(!!x. PROP ?P x) == (!!a b. PROP ?P (a, b))"
wenzelm
parents: 5722
diff changeset
   743
wenzelm
parents: 5722
diff changeset
   744
Thus any record variable that is bound by meta-all will automatically
wenzelm
parents: 5722
diff changeset
   745
blow up into some record constructor term, consequently the
wenzelm
parents: 5722
diff changeset
   746
simplifications of 1), 2) apply.  Thus force_tac, auto_tac etc. shall
wenzelm
parents: 5722
diff changeset
   747
solve record problems automatically.
wenzelm
parents: 5722
diff changeset
   748
5214
75c6392d1274 Adapted to new datatype package.
berghofe
parents: 5207
diff changeset
   749
5125
463a0e9df5b5 reorganized the main HOL image;
wenzelm
parents: 5109
diff changeset
   750
* reorganized the main HOL image: HOL/Integ and String loaded by
463a0e9df5b5 reorganized the main HOL image;
wenzelm
parents: 5109
diff changeset
   751
default; theory Main includes everything;
463a0e9df5b5 reorganized the main HOL image;
wenzelm
parents: 5109
diff changeset
   752
5650
38bda28c68a2 integer simprocs
paulson
parents: 5572
diff changeset
   753
* automatic simplification of integer sums and comparisons, using cancellation;
38bda28c68a2 integer simprocs
paulson
parents: 5572
diff changeset
   754
5526
e7617b57a3e6 *** empty log message ***
oheimb
parents: 5524
diff changeset
   755
* added option_map_eq_Some and not_Some_eq to the default simpset and claset;
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   756
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   757
* added disj_not1 = "(~P | Q) = (P --> Q)" to the default simpset;
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   758
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   759
* many new identities for unions, intersections, set difference, etc.;
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   760
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   761
* expand_if, expand_split, expand_sum_case and expand_nat_case are now
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   762
called split_if, split_split, split_sum_case and split_nat_case (to go
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   763
with add/delsplits);
5125
463a0e9df5b5 reorganized the main HOL image;
wenzelm
parents: 5109
diff changeset
   764
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   765
* HOL/Prod introduces simplification procedure unit_eq_proc rewriting
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   766
(?x::unit) = (); this is made part of the default simpset, which COULD
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   767
MAKE EXISTING PROOFS FAIL under rare circumstances (consider
5207
wenzelm
parents: 5160
diff changeset
   768
'Delsimprocs [unit_eq_proc];' as last resort); also note that
wenzelm
parents: 5160
diff changeset
   769
unit_abs_eta_conv is added in order to counter the effect of
wenzelm
parents: 5160
diff changeset
   770
unit_eq_proc on (%u::unit. f u), replacing it by f rather than by
wenzelm
parents: 5160
diff changeset
   771
%u.f();
5125
463a0e9df5b5 reorganized the main HOL image;
wenzelm
parents: 5109
diff changeset
   772
5217
wenzelm
parents: 5214
diff changeset
   773
* HOL/Fun INCOMPATIBILITY: `inj_onto' is now called `inj_on' (which
wenzelm
parents: 5214
diff changeset
   774
makes more sense);
5109
b3d18eb3ac20 Adapted to new inductive definition package.
berghofe
parents: 5106
diff changeset
   775
5475
410172655d64 equals0D
paulson
parents: 5428
diff changeset
   776
* HOL/Set INCOMPATIBILITY: rule `equals0D' is now a well-formed destruct rule;
410172655d64 equals0D
paulson
parents: 5428
diff changeset
   777
  It and 'sym RS equals0D' are now in the default  claset, giving automatic
410172655d64 equals0D
paulson
parents: 5428
diff changeset
   778
  disjointness reasoning but breaking a few old proofs.
5267
41a01176b9de disjointness
paulson
parents: 5251
diff changeset
   779
5217
wenzelm
parents: 5214
diff changeset
   780
* HOL/Relation INCOMPATIBILITY: renamed the relational operator r^-1
wenzelm
parents: 5214
diff changeset
   781
to 'converse' from 'inverse' (for compatibility with ZF and some
wenzelm
parents: 5214
diff changeset
   782
literature);
5085
8e5a7942fdea simplification procedure unit_eq_proc rewrites (?x::unit) = ();
wenzelm
parents: 5077
diff changeset
   783
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   784
* HOL/recdef can now declare non-recursive functions, with {} supplied as
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   785
the well-founded relation;
4838
196100237656 cleanup for split_all_tac as wrapper in claset()
oheimb
parents: 4835
diff changeset
   786
5490
85855f65d0c6 From Compl(A) to -A
paulson
parents: 5475
diff changeset
   787
* 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
   788
    Compl A.  The "Compl" syntax remains available as input syntax for this
85855f65d0c6 From Compl(A) to -A
paulson
parents: 5475
diff changeset
   789
    release ONLY.
85855f65d0c6 From Compl(A) to -A
paulson
parents: 5475
diff changeset
   790
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   791
* HOL/Update: new theory of function updates:
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   792
    f(a:=b) == %x. if x=a then b else f x
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   793
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
   794
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   795
* HOL/Vimage: new theory for inverse image of a function, syntax f-``B;
4899
447d6b2956ba HOL/Update
paulson
parents: 4880
diff changeset
   796
5282
80c75c862a8f *** empty log message ***
nipkow
parents: 5275
diff changeset
   797
* HOL/List:
80c75c862a8f *** empty log message ***
nipkow
parents: 5275
diff changeset
   798
  - new function list_update written xs[i:=v] that updates the i-th
80c75c862a8f *** empty log message ***
nipkow
parents: 5275
diff changeset
   799
    list position. May also be iterated as in xs[i:=a,j:=b,...].
5428
5a6c4f666a25 Function 'upt'
nipkow
parents: 5407
diff changeset
   800
  - new function `upt' written [i..j(] which generates the list
5a6c4f666a25 Function 'upt'
nipkow
parents: 5407
diff changeset
   801
    [i,i+1,...,j-1], i.e. the upper bound is excluded. To include the upper
5a6c4f666a25 Function 'upt'
nipkow
parents: 5407
diff changeset
   802
    bound write [i..j], which is a shorthand for [i..j+1(].
5282
80c75c862a8f *** empty log message ***
nipkow
parents: 5275
diff changeset
   803
  - new lexicographic orderings and corresponding wellfoundedness theorems.
4779
paulson
parents: 4766
diff changeset
   804
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   805
* HOL/Arith:
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   806
  - removed 'pred' (predecessor) function;
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   807
  - generalized some theorems about n-1;
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   808
  - many new laws about "div" and "mod";
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   809
  - new laws about greatest common divisors (see theory ex/Primes);
4766
9658aab68363 *** empty log message ***
oheimb
parents: 4747
diff changeset
   810
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   811
* HOL/Relation: renamed the relational operator r^-1 "converse"
4842
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
   812
instead of "inverse";
4711
75a9ef36b1fe removed pred;
wenzelm
parents: 4683
diff changeset
   813
5651
ca45d6126c8a *** empty log message ***
nipkow
parents: 5650
diff changeset
   814
* HOL/Induct/Multiset: a theory of multisets, including the wellfoundedness
ca45d6126c8a *** empty log message ***
nipkow
parents: 5650
diff changeset
   815
  of the multiset ordering;
ca45d6126c8a *** empty log message ***
nipkow
parents: 5650
diff changeset
   816
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   817
* directory HOL/Real: a construction of the reals using Dedekind cuts
5651
ca45d6126c8a *** empty log message ***
nipkow
parents: 5650
diff changeset
   818
  (not included by default);
4835
f90a427d903f *** empty log message ***
nipkow
parents: 4828
diff changeset
   819
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   820
* directory HOL/UNITY: Chandy and Misra's UNITY formalism;
4711
75a9ef36b1fe removed pred;
wenzelm
parents: 4683
diff changeset
   821
5651
ca45d6126c8a *** empty log message ***
nipkow
parents: 5650
diff changeset
   822
* directory HOL/Hoare: a new version of Hoare logic which permits many-sorted
ca45d6126c8a *** empty log message ***
nipkow
parents: 5650
diff changeset
   823
  programs, i.e. different program variables may have different types.
ca45d6126c8a *** empty log message ***
nipkow
parents: 5650
diff changeset
   824
5142
c56aa8b59dc0 new stac
paulson
parents: 5140
diff changeset
   825
* calling (stac rew i) now fails if "rew" has no effect on the goal
c56aa8b59dc0 new stac
paulson
parents: 5140
diff changeset
   826
  [previously, this check worked only if the rewrite rule was unconditional]
5308
paulson
parents: 5282
diff changeset
   827
  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
   828
5363
0cf15843b82f isatool install;
wenzelm
parents: 5332
diff changeset
   829
4879
58656c6a3551 "let" is no longer restricted to FOL terms and allows any logical terms
paulson
parents: 4869
diff changeset
   830
*** ZF ***
58656c6a3551 "let" is no longer restricted to FOL terms and allows any logical terms
paulson
parents: 4869
diff changeset
   831
5332
paulson
parents: 5308
diff changeset
   832
* theory Main includes everything; INCOMPATIBILITY: theory ZF.thy contains
paulson
parents: 5308
diff changeset
   833
  only the theorems proved on ZF.ML;
5160
1ff6679144b9 ZF: Main, Update
paulson
parents: 5145
diff changeset
   834
5475
410172655d64 equals0D
paulson
parents: 5428
diff changeset
   835
* ZF INCOMPATIBILITY: rule `equals0D' is now a well-formed destruct rule;
410172655d64 equals0D
paulson
parents: 5428
diff changeset
   836
  It and 'sym RS equals0D' are now in the default  claset, giving automatic
410172655d64 equals0D
paulson
parents: 5428
diff changeset
   837
  disjointness reasoning but breaking a few old proofs.
5267
41a01176b9de disjointness
paulson
parents: 5251
diff changeset
   838
5160
1ff6679144b9 ZF: Main, Update
paulson
parents: 5145
diff changeset
   839
* ZF/Update: new theory of function updates
1ff6679144b9 ZF: Main, Update
paulson
parents: 5145
diff changeset
   840
    with default rewrite rule  f(x:=y) ` z = if(z=x, y, f`z)
1ff6679144b9 ZF: Main, Update
paulson
parents: 5145
diff changeset
   841
  may also be iterated as in f(a:=b,c:=d,...);
1ff6679144b9 ZF: Main, Update
paulson
parents: 5145
diff changeset
   842
4879
58656c6a3551 "let" is no longer restricted to FOL terms and allows any logical terms
paulson
parents: 4869
diff changeset
   843
* 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
   844
5142
c56aa8b59dc0 new stac
paulson
parents: 5140
diff changeset
   845
* calling (stac rew i) now fails if "rew" has no effect on the goal
c56aa8b59dc0 new stac
paulson
parents: 5140
diff changeset
   846
  [previously, this check worked only if the rewrite rule was unconditional]
5308
paulson
parents: 5282
diff changeset
   847
  Now rew can involve either definitions or equalities (either == or =).
5142
c56aa8b59dc0 new stac
paulson
parents: 5140
diff changeset
   848
5160
1ff6679144b9 ZF: Main, Update
paulson
parents: 5145
diff changeset
   849
* case_tac provided for compatibility with HOL
1ff6679144b9 ZF: Main, Update
paulson
parents: 5145
diff changeset
   850
    (like the old excluded_middle_tac, but with subgoals swapped)
1ff6679144b9 ZF: Main, Update
paulson
parents: 5145
diff changeset
   851
4842
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
   852
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   853
*** Internal programming interfaces ***
5002
7b4c2a153738 * improved the theory data mechanism to support real encapsulation;
wenzelm
parents: 4981
diff changeset
   854
5251
wenzelm
parents: 5226
diff changeset
   855
* Pure: several new basic modules made available for general use, see
wenzelm
parents: 5226
diff changeset
   856
also src/Pure/README;
5207
wenzelm
parents: 5160
diff changeset
   857
5008
6f56d9650ee9 new type-safe user interface for theory data;
wenzelm
parents: 5002
diff changeset
   858
* improved the theory data mechanism to support encapsulation (data
6f56d9650ee9 new type-safe user interface for theory data;
wenzelm
parents: 5002
diff changeset
   859
kind name replaced by private Object.kind, acting as authorization
5373
wenzelm
parents: 5363
diff changeset
   860
key); new type-safe user interface via functor TheoryDataFun; generic
wenzelm
parents: 5363
diff changeset
   861
print_data function becomes basically useless;
5002
7b4c2a153738 * improved the theory data mechanism to support real encapsulation;
wenzelm
parents: 4981
diff changeset
   862
5251
wenzelm
parents: 5226
diff changeset
   863
* removed global_names compatibility flag -- all theory declarations
wenzelm
parents: 5226
diff changeset
   864
are qualified by default;
wenzelm
parents: 5226
diff changeset
   865
5085
8e5a7942fdea simplification procedure unit_eq_proc rewrites (?x::unit) = ();
wenzelm
parents: 5077
diff changeset
   866
* module Pure/Syntax now offers quote / antiquote translation
8e5a7942fdea simplification procedure unit_eq_proc rewrites (?x::unit) = ();
wenzelm
parents: 5077
diff changeset
   867
functions (useful for Hoare logic etc. with implicit dependencies);
5373
wenzelm
parents: 5363
diff changeset
   868
see HOL/ex/Antiquote for an example use;
5085
8e5a7942fdea simplification procedure unit_eq_proc rewrites (?x::unit) = ();
wenzelm
parents: 5077
diff changeset
   869
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   870
* Simplifier now offers conversions (asm_)(full_)rewrite: simpset ->
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   871
cterm -> thm;
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   872
5207
wenzelm
parents: 5160
diff changeset
   873
* new tactical CHANGED_GOAL for checking that a tactic modifies a
wenzelm
parents: 5160
diff changeset
   874
subgoal;
5142
c56aa8b59dc0 new stac
paulson
parents: 5140
diff changeset
   875
5251
wenzelm
parents: 5226
diff changeset
   876
* Display.print_goals function moved to Locale.print_goals;
wenzelm
parents: 5226
diff changeset
   877
5731
f84dc3b811e9 current_goals_markers;
wenzelm
parents: 5726
diff changeset
   878
* standard print function for goals supports current_goals_markers
f84dc3b811e9 current_goals_markers;
wenzelm
parents: 5726
diff changeset
   879
variable for marking begin of proof, end of proof, start of goal; the
f84dc3b811e9 current_goals_markers;
wenzelm
parents: 5726
diff changeset
   880
default is ("", "", ""); setting current_goals_markers := ("<proof>",
f84dc3b811e9 current_goals_markers;
wenzelm
parents: 5726
diff changeset
   881
"</proof>", "<goal>") causes SGML like tagged proof state printing,
f84dc3b811e9 current_goals_markers;
wenzelm
parents: 5726
diff changeset
   882
for example;
f84dc3b811e9 current_goals_markers;
wenzelm
parents: 5726
diff changeset
   883
5002
7b4c2a153738 * improved the theory data mechanism to support real encapsulation;
wenzelm
parents: 4981
diff changeset
   884
7b4c2a153738 * improved the theory data mechanism to support real encapsulation;
wenzelm
parents: 4981
diff changeset
   885
4410
wenzelm
parents: 4388
diff changeset
   886
New in Isabelle98 (January 1998)
wenzelm
parents: 4388
diff changeset
   887
--------------------------------
wenzelm
parents: 4388
diff changeset
   888
wenzelm
parents: 4388
diff changeset
   889
*** Overview of INCOMPATIBILITIES (see below for more details) ***
wenzelm
parents: 4388
diff changeset
   890
wenzelm
parents: 4388
diff changeset
   891
* changed lexical syntax of terms / types: dots made part of long
wenzelm
parents: 4388
diff changeset
   892
identifiers, e.g. "%x.x" no longer possible, should be "%x. x";
wenzelm
parents: 4388
diff changeset
   893
wenzelm
parents: 4388
diff changeset
   894
* simpset (and claset) reference variable replaced by functions
wenzelm
parents: 4388
diff changeset
   895
simpset / simpset_ref;
wenzelm
parents: 4388
diff changeset
   896
wenzelm
parents: 4388
diff changeset
   897
* no longer supports theory aliases (via merge) and non-trivial
wenzelm
parents: 4388
diff changeset
   898
implicit merge of thms' signatures;
wenzelm
parents: 4388
diff changeset
   899
wenzelm
parents: 4388
diff changeset
   900
* most internal names of constants changed due to qualified names;
wenzelm
parents: 4388
diff changeset
   901
wenzelm
parents: 4388
diff changeset
   902
* changed Pure/Sequence interface (see Pure/seq.ML);
wenzelm
parents: 4388
diff changeset
   903
3454
40b1287347d7 removed;
wenzelm
parents: 3338
diff changeset
   904
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   905
*** General Changes ***
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   906
4174
wenzelm
parents: 4154
diff changeset
   907
* hierachically structured name spaces (for consts, types, axms, thms
3943
b6e0c90f3bf4 tuned qualified names;
wenzelm
parents: 3930
diff changeset
   908
etc.); new lexical class 'longid' (e.g. Foo.bar.x) may render much of
4108
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   909
old input syntactically incorrect (e.g. "%x.x"); COMPATIBILITY:
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   910
isatool fixdots ensures space after dots (e.g. "%x. x"); set
4174
wenzelm
parents: 4154
diff changeset
   911
long_names for fully qualified output names; NOTE: ML programs
wenzelm
parents: 4154
diff changeset
   912
(special tactics, packages etc.) referring to internal names may have
wenzelm
parents: 4154
diff changeset
   913
to be adapted to cope with fully qualified names; in case of severe
wenzelm
parents: 4154
diff changeset
   914
backward campatibility problems try setting 'global_names' at compile
wenzelm
parents: 4154
diff changeset
   915
time to have enrything declared within a flat name space; one may also
wenzelm
parents: 4154
diff changeset
   916
fine tune name declarations in theories via the 'global' and 'local'
wenzelm
parents: 4154
diff changeset
   917
section;
4108
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   918
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   919
* reimplemented the implicit simpset and claset using the new anytype
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   920
data filed in signatures; references simpset:simpset ref etc. are
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   921
replaced by functions simpset:unit->simpset and
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   922
simpset_ref:unit->simpset ref; COMPATIBILITY: use isatool fixclasimp
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   923
to patch your ML files accordingly;
3856
177c64693954 rearranged and added TLA
paulson
parents: 3851
diff changeset
   924
3857
16198fde5af5 browser info;
wenzelm
parents: 3856
diff changeset
   925
* HTML output now includes theory graph data for display with Java
16198fde5af5 browser info;
wenzelm
parents: 3856
diff changeset
   926
applet or isatool browser; data generated automatically via isatool
3901
wenzelm
parents: 3871
diff changeset
   927
usedir (see -i option, ISABELLE_USEDIR_OPTIONS);
3857
16198fde5af5 browser info;
wenzelm
parents: 3856
diff changeset
   928
3856
177c64693954 rearranged and added TLA
paulson
parents: 3851
diff changeset
   929
* defs may now be conditional; improved rewrite_goals_tac to handle
177c64693954 rearranged and added TLA
paulson
parents: 3851
diff changeset
   930
conditional equations;
177c64693954 rearranged and added TLA
paulson
parents: 3851
diff changeset
   931
4174
wenzelm
parents: 4154
diff changeset
   932
* defs now admits additional type arguments, using TYPE('a) syntax;
wenzelm
parents: 4154
diff changeset
   933
3901
wenzelm
parents: 3871
diff changeset
   934
* theory aliases via merge (e.g. M=A+B+C) no longer supported, always
wenzelm
parents: 3871
diff changeset
   935
creates a new theory node; implicit merge of thms' signatures is
4112
wenzelm
parents: 4108
diff changeset
   936
restricted to 'trivial' ones; COMPATIBILITY: one may have to use
3901
wenzelm
parents: 3871
diff changeset
   937
transfer:theory->thm->thm in (rare) cases;
wenzelm
parents: 3871
diff changeset
   938
3968
ec138de716d9 improved handling of draft signatures / theories; draft thms (and
wenzelm
parents: 3964
diff changeset
   939
* improved handling of draft signatures / theories; draft thms (and
ec138de716d9 improved handling of draft signatures / theories; draft thms (and
wenzelm
parents: 3964
diff changeset
   940
ctyps, cterms) are automatically promoted to real ones;
ec138de716d9 improved handling of draft signatures / theories; draft thms (and
wenzelm
parents: 3964
diff changeset
   941
3901
wenzelm
parents: 3871
diff changeset
   942
* slightly changed interfaces for oracles: admit many per theory, named
wenzelm
parents: 3871
diff changeset
   943
(e.g. oracle foo = mlfun), additional name argument for invoke_oracle;
wenzelm
parents: 3871
diff changeset
   944
wenzelm
parents: 3871
diff changeset
   945
* print_goals: optional output of const types (set show_consts and
wenzelm
parents: 3871
diff changeset
   946
show_types);
3851
fe9932a7cd46 print_goals: optional output of const types (set show_consts);
wenzelm
parents: 3846
diff changeset
   947
4388
wenzelm
parents: 4381
diff changeset
   948
* improved output of warnings (###) and errors (***);
3697
c5833dfcc2cc Pure: fixed idt/idts vs. pttrn/pttrns syntactic categories;
wenzelm
parents: 3671
diff changeset
   949
4178
e64ff1c1bc70 subgoal_tac displays a warning if the new subgoal has type variables
paulson
parents: 4174
diff changeset
   950
* 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
   951
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   952
* removed old README and Makefiles;
3697
c5833dfcc2cc Pure: fixed idt/idts vs. pttrn/pttrns syntactic categories;
wenzelm
parents: 3671
diff changeset
   953
3856
177c64693954 rearranged and added TLA
paulson
parents: 3851
diff changeset
   954
* 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
   955
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   956
* removed obsolete init_pps and init_database;
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   957
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   958
* deleted the obsolete tactical STATE, which was declared by
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   959
    fun STATE tacfun st = tacfun st st;
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   960
4388
wenzelm
parents: 4381
diff changeset
   961
* cd and use now support path variables, e.g. $ISABELLE_HOME, or ~
wenzelm
parents: 4381
diff changeset
   962
(which abbreviates $HOME);
4269
a045600f0c98 cd, use etc. now support path variables;
wenzelm
parents: 4207
diff changeset
   963
a045600f0c98 cd, use etc. now support path variables;
wenzelm
parents: 4207
diff changeset
   964
* changed Pure/Sequence interface (see Pure/seq.ML); COMPATIBILITY:
a045600f0c98 cd, use etc. now support path variables;
wenzelm
parents: 4207
diff changeset
   965
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
   966
qualified references to the Sequence structure only!);
a045600f0c98 cd, use etc. now support path variables;
wenzelm
parents: 4207
diff changeset
   967
4381
wenzelm
parents: 4373
diff changeset
   968
* use_thy no longer requires writable current directory; it always
wenzelm
parents: 4373
diff changeset
   969
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
   970
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   971
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   972
*** Classical Reasoner ***
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   973
3744
wenzelm
parents: 3719
diff changeset
   974
* Clarify_tac, clarify_tac, clarify_step_tac, Clarify_step_tac: new
wenzelm
parents: 3719
diff changeset
   975
tactics that use classical reasoning to simplify a subgoal without
wenzelm
parents: 3719
diff changeset
   976
splitting it into several subgoals;
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   977
3719
6a142dab2a08 Safe_tac; qed_spec_mp in FOL
paulson
parents: 3715
diff changeset
   978
* Safe_tac: like safe_tac but uses the default claset;
6a142dab2a08 Safe_tac; qed_spec_mp in FOL
paulson
parents: 3715
diff changeset
   979
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   980
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   981
*** Simplifier ***
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   982
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   983
* added simplification meta rules:
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   984
    (asm_)(full_)simplify: simpset -> thm -> thm;
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   985
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   986
* simplifier.ML no longer part of Pure -- has to be loaded by object
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   987
logics (again);
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   988
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   989
* added prems argument to simplification procedures;
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   990
4325
e72cba5af6c5 addsplits now in FOL, ZF too
paulson
parents: 4269
diff changeset
   991
* HOL, FOL, ZF: added infix function `addsplits':
e72cba5af6c5 addsplits now in FOL, ZF too
paulson
parents: 4269
diff changeset
   992
  instead of `<simpset> setloop (split_tac <thms>)'
e72cba5af6c5 addsplits now in FOL, ZF too
paulson
parents: 4269
diff changeset
   993
  you can simply write `<simpset> addsplits <thms>'
e72cba5af6c5 addsplits now in FOL, ZF too
paulson
parents: 4269
diff changeset
   994
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   995
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   996
*** Syntax ***
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   997
4174
wenzelm
parents: 4154
diff changeset
   998
* TYPE('a) syntax for type reflection terms;
wenzelm
parents: 4154
diff changeset
   999
3985
wenzelm
parents: 3982
diff changeset
  1000
* no longer handles consts with name "" -- declare as 'syntax' instead;
3856
177c64693954 rearranged and added TLA
paulson
parents: 3851
diff changeset
  1001
177c64693954 rearranged and added TLA
paulson
parents: 3851
diff changeset
  1002
* pretty printer: changed order of mixfix annotation preference (again!);
3846
6061fa463784 hierachically structured name spaces;
wenzelm
parents: 3822
diff changeset
  1003
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
  1004
* Pure: fixed idt/idts vs. pttrn/pttrns syntactic categories;
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
  1005
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
  1006
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
  1007
*** HOL ***
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
  1008
5726
wenzelm
parents: 5722
diff changeset
  1009
* 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
  1010
  with `addloop' of the simplifier to faciliate case splitting in premises.
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
  1011
4035
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
  1012
* HOL/TLA: Stephan Merz's formalization of Lamport's Temporal Logic of Actions;
3985
wenzelm
parents: 3982
diff changeset
  1013
wenzelm
parents: 3982
diff changeset
  1014
* HOL/Auth: new protocol proofs including some for the Internet
4035
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
  1015
  protocol TLS;
3985
wenzelm
parents: 3982
diff changeset
  1016
4125
wenzelm
parents: 4123
diff changeset
  1017
* HOL/Map: new theory of `maps' a la VDM;
3982
2a903ba8d39e HOL/Map
nipkow
parents: 3968
diff changeset
  1018
4335
b0acd74da01d nat_cancel simprocs;
wenzelm
parents: 4325
diff changeset
  1019
* HOL/simplifier: simplification procedures nat_cancel_sums for
b0acd74da01d nat_cancel simprocs;
wenzelm
parents: 4325
diff changeset
  1020
cancelling out common nat summands from =, <, <= (in)equalities, or
b0acd74da01d nat_cancel simprocs;
wenzelm
parents: 4325
diff changeset
  1021
differences; simplification procedures nat_cancel_factor for
b0acd74da01d nat_cancel simprocs;
wenzelm
parents: 4325
diff changeset
  1022
cancelling common factor from =, <, <= (in)equalities over natural
4373
2f831a45d571 nat_cancel enabled by default;
wenzelm
parents: 4370
diff changeset
  1023
sums; nat_cancel contains both kinds of procedures, it is installed by
2f831a45d571 nat_cancel enabled by default;
wenzelm
parents: 4370
diff changeset
  1024
default in Arith.thy -- this COULD MAKE EXISTING PROOFS FAIL;
4335
b0acd74da01d nat_cancel simprocs;
wenzelm
parents: 4325
diff changeset
  1025
3580
04c6ae944b5e new simproc
nipkow
parents: 3579
diff changeset
  1026
* HOL/simplifier: terms of the form
4325
e72cba5af6c5 addsplits now in FOL, ZF too
paulson
parents: 4269
diff changeset
  1027
  `? x. P1(x) & ... & Pn(x) & x=t & Q1(x) & ... Qn(x)'  (or t=x)
3580
04c6ae944b5e new simproc
nipkow
parents: 3579
diff changeset
  1028
  are rewritten to
4035
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
  1029
  `P1(t) & ... & Pn(t) & Q1(t) & ... Qn(t)',
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
  1030
  and those of the form
4325
e72cba5af6c5 addsplits now in FOL, ZF too
paulson
parents: 4269
diff changeset
  1031
  `! 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
  1032
  are rewritten to
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
  1033
  `P1(t) & ... & Pn(t) & Q1(t) & ... Qn(t) --> R(t)',
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
  1034
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
  1035
* HOL/datatype
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
  1036
  Each datatype `t' now comes with a theorem `split_t_case' of the form
3580
04c6ae944b5e new simproc
nipkow
parents: 3579
diff changeset
  1037
4035
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
  1038
  P(t_case f1 ... fn x) =
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
  1039
     ( (!y1 ... ym1. x = C1 y1 ... ym1 --> P(f1 y1 ... ym1)) &
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
  1040
        ...
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
  1041
       (!y1 ... ymn. x = Cn y1 ... ymn --> P(f1 y1 ... ymn))
4035
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
  1042
     )
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
  1043
4930
89271bc4e7ed extended addsplits and delsplits to handle also split rules for assumptions
oheimb
parents: 4915
diff changeset
  1044
  and a theorem `split_t_case_asm' of the form
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
  1045
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
  1046
  P(t_case f1 ... fn x) =
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
  1047
    ~( (? y1 ... ym1. x = C1 y1 ... ym1 & ~P(f1 y1 ... ym1)) |
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
  1048
        ...
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
  1049
       (? y1 ... ymn. x = Cn y1 ... ymn & ~P(f1 y1 ... ymn))
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
  1050
     )
4930
89271bc4e7ed extended addsplits and delsplits to handle also split rules for assumptions
oheimb
parents: 4915
diff changeset
  1051
  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
  1052
  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
  1053
  split_list_case and split_option_case.
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
  1054
4361
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
  1055
* HOL/Arithmetic:
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
  1056
  - `pred n' is automatically converted to `n-1'.
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
  1057
    Users are strongly encouraged not to use `pred' any longer,
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
  1058
    because it will disappear altogether at some point.
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
  1059
  - Users are strongly encouraged to write "0 < n" rather than
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
  1060
    "n ~= 0". Theorems and proof tools have been modified towards this
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
  1061
    `standard'.
4357
b852e2d2a39a n ~= 0 should become 0 < n
nipkow
parents: 4335
diff changeset
  1062
4502
337c073de95e nth -> !
nipkow
parents: 4410
diff changeset
  1063
* HOL/Lists:
337c073de95e nth -> !
nipkow
parents: 4410
diff changeset
  1064
  the function "set_of_list" has been renamed "set" (and its theorems too);
337c073de95e nth -> !
nipkow
parents: 4410
diff changeset
  1065
  the function "nth" now takes its arguments in the reverse order and
337c073de95e nth -> !
nipkow
parents: 4410
diff changeset
  1066
  has acquired the infix notation "!" as in "xs!n".
3570
d3662f90c453 set_of_list -> set
paulson
parents: 3567
diff changeset
  1067
4154
17a3a2c5a35f UNIV & UNION1
paulson
parents: 4125
diff changeset
  1068
* HOL/Set: UNIV is now a constant and is no longer translated to Compl{};
17a3a2c5a35f UNIV & UNION1
paulson
parents: 4125
diff changeset
  1069
17a3a2c5a35f UNIV & UNION1
paulson
parents: 4125
diff changeset
  1070
* 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
  1071
  specialist theorems (like UN1_I) are gone.  Similarly for (INT x.B x);
17a3a2c5a35f UNIV & UNION1
paulson
parents: 4125
diff changeset
  1072
4575
e59cf7d816fe HOL/record;
wenzelm
parents: 4502
diff changeset
  1073
* HOL/record: extensible records with schematic structural subtyping
e59cf7d816fe HOL/record;
wenzelm
parents: 4502
diff changeset
  1074
(single inheritance); EXPERIMENTAL version demonstrating the encoding,
e59cf7d816fe HOL/record;
wenzelm
parents: 4502
diff changeset
  1075
still lacks various theorems and concrete record syntax;
e59cf7d816fe HOL/record;
wenzelm
parents: 4502
diff changeset
  1076
4125
wenzelm
parents: 4123
diff changeset
  1077
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
  1078
*** HOLCF ***
3535
19bd6c8274c4 defs may now be conditional;
wenzelm
parents: 3511
diff changeset
  1079
4125
wenzelm
parents: 4123
diff changeset
  1080
* removed "axioms" and "generated by" sections;
wenzelm
parents: 4123
diff changeset
  1081
4123
9600dd68d35b *** empty log message ***
oheimb
parents: 4112
diff changeset
  1082
* replaced "ops" section by extended "consts" section, which is capable of
4125
wenzelm
parents: 4123
diff changeset
  1083
  handling the continuous function space "->" directly;
wenzelm
parents: 4123
diff changeset
  1084
wenzelm
parents: 4123
diff changeset
  1085
* domain package:
wenzelm
parents: 4123
diff changeset
  1086
  . proves theorems immediately and stores them in the theory,
wenzelm
parents: 4123
diff changeset
  1087
  . creates hierachical name space,
wenzelm
parents: 4123
diff changeset
  1088
  . now uses normal mixfix annotations (instead of cinfix...),
wenzelm
parents: 4123
diff changeset
  1089
  . minor changes to some names and values (for consistency),
wenzelm
parents: 4123
diff changeset
  1090
  . e.g. cases -> casedist, dists_eq -> dist_eqs, [take_lemma] -> take_lemmas,
wenzelm
parents: 4123
diff changeset
  1091
  . separator between mutual domain defs: changed "," to "and",
wenzelm
parents: 4123
diff changeset
  1092
  . improved handling of sort constraints;  now they have to
wenzelm
parents: 4123
diff changeset
  1093
    appear on the left-hand side of the equations only;
4123
9600dd68d35b *** empty log message ***
oheimb
parents: 4112
diff changeset
  1094
9600dd68d35b *** empty log message ***
oheimb
parents: 4112
diff changeset
  1095
* fixed LAM <x,y,zs>.b syntax;
3567
e2539e1980b4 added simplification meta rules;
wenzelm
parents: 3561
diff changeset
  1096
3744
wenzelm
parents: 3719
diff changeset
  1097
* added extended adm_tac to simplifier in HOLCF -- can now discharge
wenzelm
parents: 3719
diff changeset
  1098
adm (%x. P (t x)), where P is chainfinite and t continuous;
3579
8bd9b4b3b61d *** empty log message ***
wenzelm
parents: 3570
diff changeset
  1099
8bd9b4b3b61d *** empty log message ***
wenzelm
parents: 3570
diff changeset
  1100
3719
6a142dab2a08 Safe_tac; qed_spec_mp in FOL
paulson
parents: 3715
diff changeset
  1101
*** FOL and ZF ***
6a142dab2a08 Safe_tac; qed_spec_mp in FOL
paulson
parents: 3715
diff changeset
  1102
5726
wenzelm
parents: 5722
diff changeset
  1103
* 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
  1104
  with `addloop' of the simplifier to faciliate case splitting in premises.
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
  1105
3744
wenzelm
parents: 3719
diff changeset
  1106
* qed_spec_mp, qed_goal_spec_mp, qed_goalw_spec_mp are available, as
wenzelm
parents: 3719
diff changeset
  1107
in HOL, they strip ALL and --> from proved theorems;
wenzelm
parents: 3719
diff changeset
  1108
3719
6a142dab2a08 Safe_tac; qed_spec_mp in FOL
paulson
parents: 3715
diff changeset
  1109
3579
8bd9b4b3b61d *** empty log message ***
wenzelm
parents: 3570
diff changeset
  1110
3006
wenzelm
parents: 3002
diff changeset
  1111
New in Isabelle94-8 (May 1997)
wenzelm
parents: 3002
diff changeset
  1112
------------------------------
2654
6efa602921d1 *** empty log message ***
wenzelm
parents: 2653
diff changeset
  1113
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1114
*** General Changes ***
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1115
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1116
* 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
  1117
still somewhat experimental); old Makefiles etc. still functional;
2971
c1e1e8406fb2 *** empty log message ***
wenzelm
parents: 2927
diff changeset
  1118
3205
816a1f9fd620 *** empty log message ***
wenzelm
parents: 3116
diff changeset
  1119
* new 'Isabelle System Manual';
816a1f9fd620 *** empty log message ***
wenzelm
parents: 3116
diff changeset
  1120
2825
a94dba60d5f2 *** empty log message ***
wenzelm
parents: 2773
diff changeset
  1121
* INSTALL text, together with ./configure and ./build scripts;
2773
36fdd908a26c *** empty log message ***
wenzelm
parents: 2756
diff changeset
  1122
3006
wenzelm
parents: 3002
diff changeset
  1123
* reimplemented type inference for greater efficiency, better error
wenzelm
parents: 3002
diff changeset
  1124
messages and clean internal interface;
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1125
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1126
* 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
  1127
setting goals_limit);
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1128
3006
wenzelm
parents: 3002
diff changeset
  1129
wenzelm
parents: 3002
diff changeset
  1130
*** Syntax ***
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1131
3116
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
  1132
* supports alternative (named) syntax tables (parser and pretty
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
  1133
printer); internal interface is provided by add_modesyntax(_i);
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
  1134
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1135
* 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
  1136
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
  1137
"symbols" syntax table;
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1138
2705
d6e83a02061d *** empty log message ***
wenzelm
parents: 2654
diff changeset
  1139
* added token_translation interface (may translate name tokens in
2756
643cba384a61 *** empty log message ***
wenzelm
parents: 2747
diff changeset
  1140
arbitrary ways, dependent on their type (free, bound, tfree, ...) and
3116
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
  1141
the current print_mode); IMPORTANT: user print translation functions
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
  1142
are responsible for marking newly introduced bounds
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
  1143
(Syntax.mark_boundT);
2705
d6e83a02061d *** empty log message ***
wenzelm
parents: 2654
diff changeset
  1144
2730
865995b744f5 *** empty log message ***
wenzelm
parents: 2726
diff changeset
  1145
* token translations for modes "xterm" and "xterm_color" that display
3006
wenzelm
parents: 3002
diff changeset
  1146
names in bold, underline etc. or colors (which requires a color
wenzelm
parents: 3002
diff changeset
  1147
version of xterm);
2730
865995b744f5 *** empty log message ***
wenzelm
parents: 2726
diff changeset
  1148
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1149
* 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
  1150
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1151
* added typed_print_translation (like print_translation, but may
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1152
access type of constant);
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1153
3006
wenzelm
parents: 3002
diff changeset
  1154
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1155
*** Classical Reasoner ***
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1156
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1157
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
  1158
some limitations.  Blast_tac...
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1159
  + ignores addss, addbefore, addafter; this restriction is intrinsic
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1160
  + ignores elimination rules that don't have the correct format
5726
wenzelm
parents: 5722
diff changeset
  1161
        (the conclusion MUST be a formula variable)
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1162
  + ignores types, which can make HOL proofs fail
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1163
  + 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
  1164
    [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
  1165
  + 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
  1166
3107
wenzelm
parents: 3042
diff changeset
  1167
* substitution with equality assumptions no longer permutes other
wenzelm
parents: 3042
diff changeset
  1168
assumptions;
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1169
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1170
* 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
  1171
setwrapper to setWrapper and compwrapper to compWrapper; added safe wrapper
3107
wenzelm
parents: 3042
diff changeset
  1172
(and access functions for it);
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1173
5726
wenzelm
parents: 5722
diff changeset
  1174
* improved combination of classical reasoner and simplifier:
3317
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
  1175
  + functions for handling clasimpsets
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
  1176
  + improvement of addss: now the simplifier is called _after_ the
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
  1177
    safe steps.
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
  1178
  + safe variant of addss called addSss: uses safe simplifications
5726
wenzelm
parents: 5722
diff changeset
  1179
    _during_ the safe steps. It is more complete as it allows multiple
3317
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
  1180
    instantiations of unknowns (e.g. with slow_tac).
3006
wenzelm
parents: 3002
diff changeset
  1181
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1182
*** Simplifier ***
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1183
3006
wenzelm
parents: 3002
diff changeset
  1184
* added interface for simplification procedures (functions that
wenzelm
parents: 3002
diff changeset
  1185
produce *proven* rewrite rules on the fly, depending on current
wenzelm
parents: 3002
diff changeset
  1186
redex);
wenzelm
parents: 3002
diff changeset
  1187
wenzelm
parents: 3002
diff changeset
  1188
* ordering on terms as parameter (used for ordered rewriting);
wenzelm
parents: 3002
diff changeset
  1189
3107
wenzelm
parents: 3042
diff changeset
  1190
* 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
  1191
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1192
* 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
  1193
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
  1194
functions setsolver and addsolver have been renamed to setSolver and
3107
wenzelm
parents: 3042
diff changeset
  1195
addSolver; added safe_asm_full_simp_tac;
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1196
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1197
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1198
*** HOL ***
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1199
3042
21cd332b65d3 induct_tac
nipkow
parents: 3006
diff changeset
  1200
* a generic induction tactic `induct_tac' which works for all datatypes and
3107
wenzelm
parents: 3042
diff changeset
  1201
also for type `nat';
3042
21cd332b65d3 induct_tac
nipkow
parents: 3006
diff changeset
  1202
3316
nipkow
parents: 3227
diff changeset
  1203
* a generic case distinction tactic `exhaust_tac' which works for all
nipkow
parents: 3227
diff changeset
  1204
datatypes and also for type `nat';
nipkow
parents: 3227
diff changeset
  1205
nipkow
parents: 3227
diff changeset
  1206
* each datatype comes with a function `size';
nipkow
parents: 3227
diff changeset
  1207
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1208
* patterns in case expressions allow tuple patterns as arguments to
3107
wenzelm
parents: 3042
diff changeset
  1209
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
  1210
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1211
* primrec now also works with type nat;
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1212
3338
b99d750f6a37 Added recdef
paulson
parents: 3321
diff changeset
  1213
* recdef: a new declaration form, allows general recursive functions to be
b99d750f6a37 Added recdef
paulson
parents: 3321
diff changeset
  1214
defined in theory files.  See HOL/ex/Fib, HOL/ex/Primes, HOL/Subst/Unify.
b99d750f6a37 Added recdef
paulson
parents: 3321
diff changeset
  1215
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1216
* the constant for negation has been renamed from "not" to "Not" to
3107
wenzelm
parents: 3042
diff changeset
  1217
harmonize with FOL, ZF, LK, etc.;
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1218
3107
wenzelm
parents: 3042
diff changeset
  1219
* HOL/ex/LFilter theory of a corecursive "filter" functional for
wenzelm
parents: 3042
diff changeset
  1220
infinite lists;
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1221
3227
9190438471ea *** empty log message ***
wenzelm
parents: 3205
diff changeset
  1222
* HOL/Modelcheck demonstrates invocation of model checker oracle;
9190438471ea *** empty log message ***
wenzelm
parents: 3205
diff changeset
  1223
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1224
* 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
  1225
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
  1226
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1227
* more examples in HOL/MiniML and HOL/Auth;
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1228
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1229
* more default rewrite rules for quantifiers, union/intersection;
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1230
3321
c609a0119fd8 arbitrary
nipkow
parents: 3317
diff changeset
  1231
* a new constant `arbitrary == @x.False';
c609a0119fd8 arbitrary
nipkow
parents: 3317
diff changeset
  1232
3107
wenzelm
parents: 3042
diff changeset
  1233
* HOLCF/IOA replaces old HOL/IOA;
wenzelm
parents: 3042
diff changeset
  1234
5726
wenzelm
parents: 5722
diff changeset
  1235
* HOLCF changes: derived all rules and arities
wenzelm
parents: 5722
diff changeset
  1236
  + axiomatic type classes instead of classes
2653
f1a6997cdc06 described changes for HOLCF-Version without rules and arities
slotosch
parents: 2649
diff changeset
  1237
  + typedef instead of faking type definitions
2747
9fdc1461085f Tidied and updated
paulson
parents: 2732
diff changeset
  1238
  + eliminated the internal constants less_fun, less_cfun, UU_fun, UU_cfun etc.
2730
865995b744f5 *** empty log message ***
wenzelm
parents: 2726
diff changeset
  1239
  + 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
  1240
  + eliminated the types void, one, tr
f1a6997cdc06 described changes for HOLCF-Version without rules and arities
slotosch
parents: 2649
diff changeset
  1241
  + 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
  1242
  + eliminated blift from Lift3.thy (use Def instead of blift)
3107
wenzelm
parents: 3042
diff changeset
  1243
  all eliminated rules are derived as theorems --> no visible changes ;
2649
2edc5b01e5a7 improved description of recent changes
oheimb
parents: 2639
diff changeset
  1244
3006
wenzelm
parents: 3002
diff changeset
  1245
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
  1246
*** ZF ***
2553
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
  1247
2865
77daca16b2f4 ZF.thy is again usable
paulson
parents: 2825
diff changeset
  1248
* 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
  1249
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
  1250
as ZF_cs addSIs [equalityI];
2553
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
  1251
2554
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1252
2732
84fc9c3b6bf0 *** empty log message ***
wenzelm
parents: 2731
diff changeset
  1253
2553
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
  1254
New in Isabelle94-7 (November 96)
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
  1255
---------------------------------
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
  1256
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
  1257
* allowing negative levels (as offsets) in prlev and choplev;
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
  1258
2554
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1259
* super-linear speedup for large simplifications;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1260
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1261
* FOL, ZF and HOL now use miniscoping: rewriting pushes
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1262
quantifications in as far as possible (COULD MAKE EXISTING PROOFS
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1263
FAIL); can suppress it using the command Delsimps (ex_simps @
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1264
all_simps); De Morgan laws are also now included, by default;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1265
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1266
* improved printing of ==>  :  ~:
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1267
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1268
* new object-logic "Sequents" adds linear logic, while replacing LK
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1269
and Modal (thanks to Sara Kalvala);
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1270
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1271
* HOL/Auth: correctness proofs for authentication protocols;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1272
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1273
* HOL: new auto_tac combines rewriting and classical reasoning (many
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1274
examples on HOL/Auth);
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1275
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1276
* HOL: new command AddIffs for declaring theorems of the form P=Q to
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1277
the rewriter and classical reasoner simultaneously;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1278
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1279
* function uresult no longer returns theorems in "standard" format;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1280
regain previous version by: val uresult = standard o uresult;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1281
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1282
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1283
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1284
New in Isabelle94-6
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1285
-------------------
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1286
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1287
* oracles -- these establish an interface between Isabelle and trusted
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1288
external reasoners, which may deliver results as theorems;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1289
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1290
* proof objects (in particular record all uses of oracles);
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1291
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1292
* Simp_tac, Fast_tac, etc. that refer to implicit simpset / claset;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1293
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1294
* "constdefs" section in theory files;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1295
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1296
* "primrec" section (HOL) no longer requires names;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1297
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1298
* internal type "tactic" now simply "thm -> thm Sequence.seq";
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1299
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1300
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1301
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1302
New in Isabelle94-5
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1303
-------------------
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1304
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1305
* reduced space requirements;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1306
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1307
* automatic HTML generation from theories;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1308
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1309
* theory files no longer require "..." (quotes) around most types;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1310
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1311
* new examples, including two proofs of the Church-Rosser theorem;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1312
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1313
* non-curried (1994) version of HOL is no longer distributed;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
  1314
2553
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
  1315
2557
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1316
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1317
New in Isabelle94-4
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1318
-------------------
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1319
2747
9fdc1461085f Tidied and updated
paulson
parents: 2732
diff changeset
  1320
* greatly reduced space requirements;
2557
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1321
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1322
* theory files (.thy) no longer require \...\ escapes at line breaks;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1323
5726
wenzelm
parents: 5722
diff changeset
  1324
* searchable theorem database (see the section "Retrieving theorems" on
2557
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1325
page 8 of the Reference Manual);
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1326
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1327
* new examples, including Grabczewski's monumental case study of the
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1328
Axiom of Choice;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1329
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1330
* The previous version of HOL renamed to Old_HOL;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1331
5726
wenzelm
parents: 5722
diff changeset
  1332
* 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
  1333
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
  1334
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1335
* Mutually recursive inductive definitions finally work in HOL;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1336
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1337
* 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
  1338
translates to the operator "split";
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1339
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1340
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1341
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1342
New in Isabelle94-3
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1343
-------------------
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1344
5726
wenzelm
parents: 5722
diff changeset
  1345
* new infix operator, addss, allowing the classical reasoner to
2557
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1346
perform simplification at each step of its search.  Example:
5726
wenzelm
parents: 5722
diff changeset
  1347
        fast_tac (cs addss ss)
2557
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1348
5726
wenzelm
parents: 5722
diff changeset
  1349
* a new logic, CHOL, the same as HOL, but with a curried syntax
wenzelm
parents: 5722
diff changeset
  1350
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
  1351
look like (a,b) instead of <a,b>;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1352
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1353
* PLEASE NOTE: CHOL will eventually replace HOL!
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1354
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1355
* 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
  1356
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
  1357
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1358
* In ZF, integer numerals now denote two's-complement binary integers.
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1359
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
  1360
5726
wenzelm
parents: 5722
diff changeset
  1361
* Many new examples: I/O automata, Church-Rosser theorem, equivalents
2557
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1362
of the Axiom of Choice;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1363
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
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1366
New in Isabelle94-2
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
5726
wenzelm
parents: 5722
diff changeset
  1369
* Significantly faster resolution;
2557
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
* 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
  1372
freely;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1373
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1374
* Database of theorems for FOL, HOL and ZF.  New
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1375
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
  1376
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1377
* 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
  1378
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
  1379
(theory_of_thm);
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1380
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1381
* Bugs fixed in the inductive definition and datatype packages;
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
* 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
  1384
and HOL_dup_cs obsolete;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1385
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1386
* 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
  1387
have been removed;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1388
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1389
* Simpler definition of function space in ZF;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1390
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1391
* new results about cardinal and ordinal arithmetic in ZF;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1392
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1393
* '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
  1394
types;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1395
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1396
2553
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
  1397
$Id$