NEWS
author paulson
Thu, 08 Jul 1999 13:38:41 +0200
changeset 6915 4ab8e31a8421
parent 6795 35f214e73668
child 6922 f5c5b81b3f14
permissions -rw-r--r--
Now if_weak_cong is a standard congruence rule
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Isabelle NEWS -- history user-relevant changes
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==============================================
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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: Removed the obsolete syntax "Compl A"; use -A for set
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complement;
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* HOL: the predicate "inj" is now defined by translation to "inj_on";
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* HOL/typedef: fixed type inference for representing set; type
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arguments now have to occur explicitly on the rhs as type constraints;
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* ZF: The con_defs part of an inductive definition may no longer refer
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to constants declared in the same theory;
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* HOL, ZF: the function mk_cases, generated by the inductive
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definition package, has lost an argument.  To simplify its result, it
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uses the default simpset instead of a supplied list of theorems.
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*** Proof tools ***
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* Provers/Arith/fast_lin_arith.ML contains a functor for creating a
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decision procedure for linear arithmetic. Currently it is used for
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types `nat' and `int' in HOL (see below) but can, should and will be
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instantiated for other types and logics as well.
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a99879bd9f13 if-then-else syntax for ZF
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*** General ***
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* Isabelle manuals now also available as PDF;
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* improved browser info generation: better HTML markup (including
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colors), graph views in several sizes; isatool usedir now provides a
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proper interface for user theories (via -P option);
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* theory loader rewritten from scratch (may not be fully
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bug-compatible); old loadpath variable has been replaced by show_path,
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add_path, del_path, reset_path functions; new operations such as
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update_thy, touch_thy, remove_thy (see also isatool doc ref);
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* in locales, the "assumes" and "defines" parts may be omitted if
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empty;
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* new print_mode "xsymbols" for extended symbol support (e.g. genuine
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long arrows);
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* new print_mode "HTML";
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* path element specification '~~' refers to '$ISABELLE_HOME';
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* new flag show_tags controls display of tags of theorems (which are
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basically just comments that may be attached by some tools);
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* improved isatool install: option -k creates KDE application icon,
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option -p DIR installs standalone binaries;
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* added ML_PLATFORM setting (useful for cross-platform installations);
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more robust handling of platform specific ML images for SML/NJ;
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* Isamode 2.6 requires patch to accomodate change of Isabelle font
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mode and goal output format:
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diff -r Isamode-2.6/elisp/isa-load.el Isamode/elisp/isa-load.el
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244c244
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<       (list (isa-getenv "ISABELLE") "-msymbols" logic-name)
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---
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>       (list (isa-getenv "ISABELLE") "-misabelle_font" "-msymbols" logic-name)
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diff -r Isabelle-2.6/elisp/isa-proofstate.el Isamode/elisp/isa-proofstate.el
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181c181
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< (defconst proofstate-proofstart-regexp "^Level [0-9]+$"
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---
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> (defconst proofstate-proofstart-regexp "^Level [0-9]+"
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*** HOL ***
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* There are now decision procedures for linear arithmetic over nat and
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int:
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1. arith_tac copes with arbitrary formulae involving `=', `<', `<=',
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`+', `-', `Suc', `min', `max' and numerical constants; other subterms
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are treated as atomic; subformulae not involving type `nat' or `int'
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are ignored; quantified subformulae are ignored unless they are
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positive universal or negative existential. The tactic has to be
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invoked by hand and can be a little bit slow. In particular, the
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running time is exponential in the number of occurrences of `min' and
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`max', and `-' on `nat'.
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2. fast_arith_tac is a cut-down version of arith_tac: it only takes
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(negated) (in)equalities among the premises and the conclusion into
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account (i.e. no compound formulae) and does not know about `min' and
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`max', and `-' on `nat'. It is fast and is used automatically by the
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simplifier.
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NB: At the moment, these decision procedures do not cope with mixed
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nat/int formulae where the two parts interact, such as `m < n ==>
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int(m) < int(n)'.
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* New bounded quantifier syntax (input only):
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  ! x < y. P, ! x <= y. P, ? x < y. P, ? x <= y. P
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* HOL/TLA (Lamport's Temporal Logic of Actions): major reorganization
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-- avoids syntactic ambiguities and treats state, transition, and
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temporal levels more uniformly; introduces INCOMPATIBILITIES due to
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changed syntax and (many) tactics;
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* HOL/typedef: fixed type inference for representing set; type
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arguments now have to occur explicitly on the rhs as type constraints;
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* HOL/recdef (TFL): requires theory Recdef; 'congs' syntax now expects
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comma separated list of theorem names rather than an ML expression;
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* reset HOL_quantifiers by default, i.e. quantifiers are printed as
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ALL/EX rather than !/?;
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*** ZF ***
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* new primrec section allows primitive recursive functions to be given
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directly (as in HOL) over datatypes and the natural numbers;
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* new tactics induct_tac and exhaust_tac for induction (or case
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analysis) over datatypes and the natural numbers;
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* the datatype declaration of type T now defines the recursor T_rec;
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* simplification automatically does freeness reasoning for datatype
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constructors;
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* automatic type-inference, with AddTCs command to insert new
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type-checking rules;
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* datatype introduction rules are now added as Safe Introduction rules
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to the claset;
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* the syntax "if P then x else y" is now available in addition to
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if(P,x,y);
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*** Internal programming interfaces ***
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* AxClass.axclass_tac lost the theory argument;
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* tuned current_goals_markers semantics: begin / end goal avoids
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printing empty lines;
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* removed prs and prs_fn hook, which was broken because it did not
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include \n in its semantics, forcing writeln to add one
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uncoditionally; replaced prs_fn by writeln_fn; consider std_output:
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string -> unit if you really want to output text without newline;
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* Symbol.output subject to print mode; INCOMPATIBILITY: defaults to
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plain output, interface builders may have to enable 'isabelle_font'
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mode to get Isabelle font glyphs as before;
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* refined token_translation interface; INCOMPATIBILITY: output length
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now of type real instead of int;
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New in Isabelle98-1 (October 1998)
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----------------------------------
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*** Overview of INCOMPATIBILITIES (see below for more details) ***
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* several changes of automated proof tools;
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* HOL: major changes to the inductive and datatype packages, including
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some minor incompatibilities of theory syntax;
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* HOL: renamed r^-1 to 'converse' from 'inverse'; 'inj_onto' is now
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called `inj_on';
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* HOL: removed duplicate thms in Arith:
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  less_imp_add_less  should be replaced by  trans_less_add1
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  le_imp_add_le      should be replaced by  trans_le_add1
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* HOL: unary minus is now overloaded (new type constraints may be
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required);
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* HOL and ZF: unary minus for integers is now #- instead of #~.  In
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ZF, expressions such as n#-1 must be changed to n#- 1, since #-1 is
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now taken as an integer constant.
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* Pure: ML function 'theory_of' renamed to 'theory';
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*** Proof tools ***
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* Simplifier:
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  1. Asm_full_simp_tac is now more aggressive.
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     1. It will sometimes reorient premises if that increases their power to
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        simplify.
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     2. It does no longer proceed strictly from left to right but may also
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        rotate premises to achieve further simplification.
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     For compatibility reasons there is now Asm_lr_simp_tac which is like the
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     old Asm_full_simp_tac in that it does not rotate premises.
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  2. The simplifier now knows a little bit about nat-arithmetic.
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* Classical reasoner: wrapper mechanism for the classical reasoner now
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allows for selected deletion of wrappers, by introduction of names for
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wrapper functionals.  This implies that addbefore, addSbefore,
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addaltern, and addSaltern now take a pair (name, tactic) as argument,
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and that adding two tactics with the same name overwrites the first
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one (emitting a warning).
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  type wrapper = (int -> tactic) -> (int -> tactic)
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  setWrapper, setSWrapper, compWrapper and compSWrapper are replaced by
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  addWrapper, addSWrapper: claset * (string * wrapper) -> claset
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  delWrapper, delSWrapper: claset *  string            -> claset
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  getWrapper is renamed to appWrappers, getSWrapper to appSWrappers;
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* Classical reasoner: addbefore/addSbefore now have APPEND/ORELSE
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semantics; addbefore now affects only the unsafe part of step_tac
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etc.; this affects addss/auto_tac/force_tac, so EXISTING PROOFS MAY
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FAIL, but proofs should be fixable easily, e.g. by replacing Auto_tac
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by Force_tac;
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* Classical reasoner: setwrapper to setWrapper and compwrapper to
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compWrapper; added safe wrapper (and access functions for it);
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* HOL/split_all_tac is now much faster and fails if there is nothing
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to split.  Some EXISTING PROOFS MAY REQUIRE ADAPTION because the order
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and the names of the automatically generated variables have changed.
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split_all_tac has moved within claset() from unsafe wrappers to safe
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wrappers, which means that !!-bound variables are split much more
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aggressively, and safe_tac and clarify_tac now split such variables.
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If this splitting is not appropriate, use delSWrapper "split_all_tac".
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Note: the same holds for record_split_tac, which does the job of
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split_all_tac for record fields.
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* HOL/Simplifier: Rewrite rules for case distinctions can now be added
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permanently to the default simpset using Addsplits just like
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Addsimps. They can be removed via Delsplits just like
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Delsimps. Lower-case versions are also available.
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* HOL/Simplifier: The rule split_if is now part of the default
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simpset. This means that the simplifier will eliminate all occurrences
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of if-then-else in the conclusion of a goal. To prevent this, you can
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either remove split_if completely from the default simpset by
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`Delsplits [split_if]' or remove it in a specific call of the
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simplifier using `... delsplits [split_if]'.  You can also add/delete
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other case splitting rules to/from the default simpset: every datatype
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generates suitable rules `split_t_case' and `split_t_case_asm' (where
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t is the name of the datatype).
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* Classical reasoner / Simplifier combination: new force_tac (and
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derivatives Force_tac, force) combines rewriting and classical
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reasoning (and whatever other tools) similarly to auto_tac, but is
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aimed to solve the given subgoal completely.
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*** General ***
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* new top-level commands `Goal' and `Goalw' that improve upon `goal'
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and `goalw': the theory is no longer needed as an explicit argument -
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the current theory context is used; assumptions are no longer returned
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at the ML-level unless one of them starts with ==> or !!; it is
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recommended to convert to these new commands using isatool fixgoal
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(backup your sources first!);
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* new top-level commands 'thm' and 'thms' for retrieving theorems from
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the current theory context, and 'theory' to lookup stored theories;
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* new theory section 'locale' for declaring constants, assumptions and
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definitions that have local scope;
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* new theory section 'nonterminals' for purely syntactic types;
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* new theory section 'setup' for generic ML setup functions
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(e.g. package initialization);
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* the distribution now includes Isabelle icons: see
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lib/logo/isabelle-{small,tiny}.xpm;
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* isatool install - install binaries with absolute references to
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ISABELLE_HOME/bin;
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* isatool logo -- create instances of the Isabelle logo (as EPS);
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* print mode 'emacs' reserved for Isamode;
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* support multiple print (ast) translations per constant name;
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*** HOL ***
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* there is now a tutorial on Isabelle/HOL (do 'isatool doc tutorial');
5709
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* HOL/inductive package reorganized and improved: now supports mutual
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definitions such as
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  inductive EVEN ODD
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    intrs
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      null "0 : EVEN"
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      oddI "n : EVEN ==> Suc n : ODD"
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      evenI "n : ODD ==> Suc n : EVEN"
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new theorem list "elims" contains an elimination rule for each of the
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recursive sets; inductive definitions now handle disjunctive premises
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correctly (also ZF);
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INCOMPATIBILITIES: requires Inductive as an ancestor; component
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"mutual_induct" no longer exists - the induction rule is always
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contained in "induct";
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* HOL/datatype package re-implemented and greatly improved: now
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supports mutually recursive datatypes such as
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  datatype
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    'a aexp = IF_THEN_ELSE ('a bexp) ('a aexp) ('a aexp)
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            | SUM ('a aexp) ('a aexp)
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            | DIFF ('a aexp) ('a aexp)
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            | NUM 'a
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  and
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    'a bexp = LESS ('a aexp) ('a aexp)
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            | AND ('a bexp) ('a bexp)
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            | OR ('a bexp) ('a bexp)
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as well as indirectly recursive datatypes such as
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  datatype
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    ('a, 'b) term = Var 'a
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                  | App 'b ((('a, 'b) term) list)
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5217
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The new tactic  mutual_induct_tac [<var_1>, ..., <var_n>] i  performs
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   333
induction on mutually / indirectly recursive datatypes.
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Primrec equations are now stored in theory and can be accessed via
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   336
<function_name>.simps.
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   337
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INCOMPATIBILITIES:
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  - Theories using datatypes must now have theory Datatype as an
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   341
    ancestor.
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   342
  - The specific <typename>.induct_tac no longer exists - use the
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   343
    generic induct_tac instead.
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  - natE has been renamed to nat.exhaust - use exhaust_tac
5217
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    instead of res_inst_tac ... natE. Note that the variable
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    names in nat.exhaust differ from the names in natE, this
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    may cause some "fragile" proofs to fail.
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   348
  - The theorems split_<typename>_case and split_<typename>_case_asm
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   349
    have been renamed to <typename>.split and <typename>.split_asm.
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   350
  - Since default sorts of type variables are now handled correctly,
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   351
    some datatype definitions may have to be annotated with explicit
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   352
    sort constraints.
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  - Primrec definitions no longer require function name and type
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   354
    of recursive argument.
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5217
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Consider using isatool fixdatatype to adapt your theories and proof
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   357
scripts to the new package (backup your sources first!).
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* HOL/record package: considerably improved implementation; now
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   361
includes concrete syntax for record types, terms, updates; theorems
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   362
for surjective pairing and splitting !!-bound record variables; proof
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   363
support is as follows:
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   364
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  1) standard conversions (selectors or updates applied to record
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   366
constructor terms) are part of the standard simpset;
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   367
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  2) inject equations of the form ((x, y) = (x', y')) == x=x' & y=y' are
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made part of standard simpset and claset via addIffs;
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   370
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   371
  3) a tactic for record field splitting (record_split_tac) is part of
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   372
the standard claset (addSWrapper);
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   373
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To get a better idea about these rules you may retrieve them via
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   375
something like 'thms "foo.simps"' or 'thms "foo.iffs"', where "foo" is
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   376
the name of your record type.
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   377
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   378
The split tactic 3) conceptually simplifies by the following rule:
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   379
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  "(!!x. PROP ?P x) == (!!a b. PROP ?P (a, b))"
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   381
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   382
Thus any record variable that is bound by meta-all will automatically
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   383
blow up into some record constructor term, consequently the
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   384
simplifications of 1), 2) apply.  Thus force_tac, auto_tac etc. shall
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   385
solve record problems automatically.
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   386
5214
75c6392d1274 Adapted to new datatype package.
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   387
5125
463a0e9df5b5 reorganized the main HOL image;
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   388
* reorganized the main HOL image: HOL/Integ and String loaded by
463a0e9df5b5 reorganized the main HOL image;
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   389
default; theory Main includes everything;
463a0e9df5b5 reorganized the main HOL image;
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   390
5650
38bda28c68a2 integer simprocs
paulson
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   391
* automatic simplification of integer sums and comparisons, using cancellation;
38bda28c68a2 integer simprocs
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diff changeset
   392
5526
e7617b57a3e6 *** empty log message ***
oheimb
parents: 5524
diff changeset
   393
* added option_map_eq_Some and not_Some_eq to the default simpset and claset;
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   394
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   395
* added disj_not1 = "(~P | Q) = (P --> Q)" to the default simpset;
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   396
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   397
* many new identities for unions, intersections, set difference, etc.;
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   398
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   399
* expand_if, expand_split, expand_sum_case and expand_nat_case are now
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   400
called split_if, split_split, split_sum_case and split_nat_case (to go
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   401
with add/delsplits);
5125
463a0e9df5b5 reorganized the main HOL image;
wenzelm
parents: 5109
diff changeset
   402
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   403
* HOL/Prod introduces simplification procedure unit_eq_proc rewriting
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   404
(?x::unit) = (); this is made part of the default simpset, which COULD
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   405
MAKE EXISTING PROOFS FAIL under rare circumstances (consider
5207
wenzelm
parents: 5160
diff changeset
   406
'Delsimprocs [unit_eq_proc];' as last resort); also note that
wenzelm
parents: 5160
diff changeset
   407
unit_abs_eta_conv is added in order to counter the effect of
wenzelm
parents: 5160
diff changeset
   408
unit_eq_proc on (%u::unit. f u), replacing it by f rather than by
wenzelm
parents: 5160
diff changeset
   409
%u.f();
5125
463a0e9df5b5 reorganized the main HOL image;
wenzelm
parents: 5109
diff changeset
   410
5217
wenzelm
parents: 5214
diff changeset
   411
* HOL/Fun INCOMPATIBILITY: `inj_onto' is now called `inj_on' (which
wenzelm
parents: 5214
diff changeset
   412
makes more sense);
5109
b3d18eb3ac20 Adapted to new inductive definition package.
berghofe
parents: 5106
diff changeset
   413
5475
410172655d64 equals0D
paulson
parents: 5428
diff changeset
   414
* HOL/Set INCOMPATIBILITY: rule `equals0D' is now a well-formed destruct rule;
410172655d64 equals0D
paulson
parents: 5428
diff changeset
   415
  It and 'sym RS equals0D' are now in the default  claset, giving automatic
410172655d64 equals0D
paulson
parents: 5428
diff changeset
   416
  disjointness reasoning but breaking a few old proofs.
5267
41a01176b9de disjointness
paulson
parents: 5251
diff changeset
   417
5217
wenzelm
parents: 5214
diff changeset
   418
* HOL/Relation INCOMPATIBILITY: renamed the relational operator r^-1
wenzelm
parents: 5214
diff changeset
   419
to 'converse' from 'inverse' (for compatibility with ZF and some
wenzelm
parents: 5214
diff changeset
   420
literature);
5085
8e5a7942fdea simplification procedure unit_eq_proc rewrites (?x::unit) = ();
wenzelm
parents: 5077
diff changeset
   421
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   422
* HOL/recdef can now declare non-recursive functions, with {} supplied as
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   423
the well-founded relation;
4838
196100237656 cleanup for split_all_tac as wrapper in claset()
oheimb
parents: 4835
diff changeset
   424
5490
85855f65d0c6 From Compl(A) to -A
paulson
parents: 5475
diff changeset
   425
* 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
   426
    Compl A.  The "Compl" syntax remains available as input syntax for this
85855f65d0c6 From Compl(A) to -A
paulson
parents: 5475
diff changeset
   427
    release ONLY.
85855f65d0c6 From Compl(A) to -A
paulson
parents: 5475
diff changeset
   428
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   429
* HOL/Update: new theory of function updates:
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   430
    f(a:=b) == %x. if x=a then b else f x
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   431
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
   432
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   433
* HOL/Vimage: new theory for inverse image of a function, syntax f-``B;
4899
447d6b2956ba HOL/Update
paulson
parents: 4880
diff changeset
   434
5282
80c75c862a8f *** empty log message ***
nipkow
parents: 5275
diff changeset
   435
* HOL/List:
80c75c862a8f *** empty log message ***
nipkow
parents: 5275
diff changeset
   436
  - new function list_update written xs[i:=v] that updates the i-th
80c75c862a8f *** empty log message ***
nipkow
parents: 5275
diff changeset
   437
    list position. May also be iterated as in xs[i:=a,j:=b,...].
5428
5a6c4f666a25 Function 'upt'
nipkow
parents: 5407
diff changeset
   438
  - new function `upt' written [i..j(] which generates the list
5a6c4f666a25 Function 'upt'
nipkow
parents: 5407
diff changeset
   439
    [i,i+1,...,j-1], i.e. the upper bound is excluded. To include the upper
5a6c4f666a25 Function 'upt'
nipkow
parents: 5407
diff changeset
   440
    bound write [i..j], which is a shorthand for [i..j+1(].
5282
80c75c862a8f *** empty log message ***
nipkow
parents: 5275
diff changeset
   441
  - new lexicographic orderings and corresponding wellfoundedness theorems.
4779
paulson
parents: 4766
diff changeset
   442
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   443
* HOL/Arith:
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   444
  - removed 'pred' (predecessor) function;
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   445
  - generalized some theorems about n-1;
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   446
  - many new laws about "div" and "mod";
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   447
  - new laws about greatest common divisors (see theory ex/Primes);
4766
9658aab68363 *** empty log message ***
oheimb
parents: 4747
diff changeset
   448
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   449
* HOL/Relation: renamed the relational operator r^-1 "converse"
4842
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
   450
instead of "inverse";
4711
75a9ef36b1fe removed pred;
wenzelm
parents: 4683
diff changeset
   451
5651
ca45d6126c8a *** empty log message ***
nipkow
parents: 5650
diff changeset
   452
* HOL/Induct/Multiset: a theory of multisets, including the wellfoundedness
ca45d6126c8a *** empty log message ***
nipkow
parents: 5650
diff changeset
   453
  of the multiset ordering;
ca45d6126c8a *** empty log message ***
nipkow
parents: 5650
diff changeset
   454
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   455
* directory HOL/Real: a construction of the reals using Dedekind cuts
5651
ca45d6126c8a *** empty log message ***
nipkow
parents: 5650
diff changeset
   456
  (not included by default);
4835
f90a427d903f *** empty log message ***
nipkow
parents: 4828
diff changeset
   457
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   458
* directory HOL/UNITY: Chandy and Misra's UNITY formalism;
4711
75a9ef36b1fe removed pred;
wenzelm
parents: 4683
diff changeset
   459
5651
ca45d6126c8a *** empty log message ***
nipkow
parents: 5650
diff changeset
   460
* directory HOL/Hoare: a new version of Hoare logic which permits many-sorted
ca45d6126c8a *** empty log message ***
nipkow
parents: 5650
diff changeset
   461
  programs, i.e. different program variables may have different types.
ca45d6126c8a *** empty log message ***
nipkow
parents: 5650
diff changeset
   462
5142
c56aa8b59dc0 new stac
paulson
parents: 5140
diff changeset
   463
* calling (stac rew i) now fails if "rew" has no effect on the goal
c56aa8b59dc0 new stac
paulson
parents: 5140
diff changeset
   464
  [previously, this check worked only if the rewrite rule was unconditional]
5308
paulson
parents: 5282
diff changeset
   465
  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
   466
5363
0cf15843b82f isatool install;
wenzelm
parents: 5332
diff changeset
   467
4879
58656c6a3551 "let" is no longer restricted to FOL terms and allows any logical terms
paulson
parents: 4869
diff changeset
   468
*** ZF ***
58656c6a3551 "let" is no longer restricted to FOL terms and allows any logical terms
paulson
parents: 4869
diff changeset
   469
5332
paulson
parents: 5308
diff changeset
   470
* theory Main includes everything; INCOMPATIBILITY: theory ZF.thy contains
paulson
parents: 5308
diff changeset
   471
  only the theorems proved on ZF.ML;
5160
1ff6679144b9 ZF: Main, Update
paulson
parents: 5145
diff changeset
   472
5475
410172655d64 equals0D
paulson
parents: 5428
diff changeset
   473
* ZF INCOMPATIBILITY: rule `equals0D' is now a well-formed destruct rule;
410172655d64 equals0D
paulson
parents: 5428
diff changeset
   474
  It and 'sym RS equals0D' are now in the default  claset, giving automatic
410172655d64 equals0D
paulson
parents: 5428
diff changeset
   475
  disjointness reasoning but breaking a few old proofs.
5267
41a01176b9de disjointness
paulson
parents: 5251
diff changeset
   476
5160
1ff6679144b9 ZF: Main, Update
paulson
parents: 5145
diff changeset
   477
* ZF/Update: new theory of function updates
1ff6679144b9 ZF: Main, Update
paulson
parents: 5145
diff changeset
   478
    with default rewrite rule  f(x:=y) ` z = if(z=x, y, f`z)
1ff6679144b9 ZF: Main, Update
paulson
parents: 5145
diff changeset
   479
  may also be iterated as in f(a:=b,c:=d,...);
1ff6679144b9 ZF: Main, Update
paulson
parents: 5145
diff changeset
   480
4879
58656c6a3551 "let" is no longer restricted to FOL terms and allows any logical terms
paulson
parents: 4869
diff changeset
   481
* 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
   482
5142
c56aa8b59dc0 new stac
paulson
parents: 5140
diff changeset
   483
* calling (stac rew i) now fails if "rew" has no effect on the goal
c56aa8b59dc0 new stac
paulson
parents: 5140
diff changeset
   484
  [previously, this check worked only if the rewrite rule was unconditional]
5308
paulson
parents: 5282
diff changeset
   485
  Now rew can involve either definitions or equalities (either == or =).
5142
c56aa8b59dc0 new stac
paulson
parents: 5140
diff changeset
   486
5160
1ff6679144b9 ZF: Main, Update
paulson
parents: 5145
diff changeset
   487
* case_tac provided for compatibility with HOL
1ff6679144b9 ZF: Main, Update
paulson
parents: 5145
diff changeset
   488
    (like the old excluded_middle_tac, but with subgoals swapped)
1ff6679144b9 ZF: Main, Update
paulson
parents: 5145
diff changeset
   489
4842
0afcae75b34a *** empty log message ***
wenzelm
parents: 4838
diff changeset
   490
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   491
*** Internal programming interfaces ***
5002
7b4c2a153738 * improved the theory data mechanism to support real encapsulation;
wenzelm
parents: 4981
diff changeset
   492
5251
wenzelm
parents: 5226
diff changeset
   493
* Pure: several new basic modules made available for general use, see
wenzelm
parents: 5226
diff changeset
   494
also src/Pure/README;
5207
wenzelm
parents: 5160
diff changeset
   495
5008
6f56d9650ee9 new type-safe user interface for theory data;
wenzelm
parents: 5002
diff changeset
   496
* improved the theory data mechanism to support encapsulation (data
6f56d9650ee9 new type-safe user interface for theory data;
wenzelm
parents: 5002
diff changeset
   497
kind name replaced by private Object.kind, acting as authorization
5373
wenzelm
parents: 5363
diff changeset
   498
key); new type-safe user interface via functor TheoryDataFun; generic
wenzelm
parents: 5363
diff changeset
   499
print_data function becomes basically useless;
5002
7b4c2a153738 * improved the theory data mechanism to support real encapsulation;
wenzelm
parents: 4981
diff changeset
   500
5251
wenzelm
parents: 5226
diff changeset
   501
* removed global_names compatibility flag -- all theory declarations
wenzelm
parents: 5226
diff changeset
   502
are qualified by default;
wenzelm
parents: 5226
diff changeset
   503
5085
8e5a7942fdea simplification procedure unit_eq_proc rewrites (?x::unit) = ();
wenzelm
parents: 5077
diff changeset
   504
* module Pure/Syntax now offers quote / antiquote translation
8e5a7942fdea simplification procedure unit_eq_proc rewrites (?x::unit) = ();
wenzelm
parents: 5077
diff changeset
   505
functions (useful for Hoare logic etc. with implicit dependencies);
5373
wenzelm
parents: 5363
diff changeset
   506
see HOL/ex/Antiquote for an example use;
5085
8e5a7942fdea simplification procedure unit_eq_proc rewrites (?x::unit) = ();
wenzelm
parents: 5077
diff changeset
   507
5127
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   508
* Simplifier now offers conversions (asm_)(full_)rewrite: simpset ->
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   509
cterm -> thm;
ef467e05da61 cleaned up;
wenzelm
parents: 5125
diff changeset
   510
5207
wenzelm
parents: 5160
diff changeset
   511
* new tactical CHANGED_GOAL for checking that a tactic modifies a
wenzelm
parents: 5160
diff changeset
   512
subgoal;
5142
c56aa8b59dc0 new stac
paulson
parents: 5140
diff changeset
   513
5251
wenzelm
parents: 5226
diff changeset
   514
* Display.print_goals function moved to Locale.print_goals;
wenzelm
parents: 5226
diff changeset
   515
5731
f84dc3b811e9 current_goals_markers;
wenzelm
parents: 5726
diff changeset
   516
* standard print function for goals supports current_goals_markers
f84dc3b811e9 current_goals_markers;
wenzelm
parents: 5726
diff changeset
   517
variable for marking begin of proof, end of proof, start of goal; the
f84dc3b811e9 current_goals_markers;
wenzelm
parents: 5726
diff changeset
   518
default is ("", "", ""); setting current_goals_markers := ("<proof>",
f84dc3b811e9 current_goals_markers;
wenzelm
parents: 5726
diff changeset
   519
"</proof>", "<goal>") causes SGML like tagged proof state printing,
f84dc3b811e9 current_goals_markers;
wenzelm
parents: 5726
diff changeset
   520
for example;
f84dc3b811e9 current_goals_markers;
wenzelm
parents: 5726
diff changeset
   521
5002
7b4c2a153738 * improved the theory data mechanism to support real encapsulation;
wenzelm
parents: 4981
diff changeset
   522
7b4c2a153738 * improved the theory data mechanism to support real encapsulation;
wenzelm
parents: 4981
diff changeset
   523
4410
wenzelm
parents: 4388
diff changeset
   524
New in Isabelle98 (January 1998)
wenzelm
parents: 4388
diff changeset
   525
--------------------------------
wenzelm
parents: 4388
diff changeset
   526
wenzelm
parents: 4388
diff changeset
   527
*** Overview of INCOMPATIBILITIES (see below for more details) ***
wenzelm
parents: 4388
diff changeset
   528
wenzelm
parents: 4388
diff changeset
   529
* changed lexical syntax of terms / types: dots made part of long
wenzelm
parents: 4388
diff changeset
   530
identifiers, e.g. "%x.x" no longer possible, should be "%x. x";
wenzelm
parents: 4388
diff changeset
   531
wenzelm
parents: 4388
diff changeset
   532
* simpset (and claset) reference variable replaced by functions
wenzelm
parents: 4388
diff changeset
   533
simpset / simpset_ref;
wenzelm
parents: 4388
diff changeset
   534
wenzelm
parents: 4388
diff changeset
   535
* no longer supports theory aliases (via merge) and non-trivial
wenzelm
parents: 4388
diff changeset
   536
implicit merge of thms' signatures;
wenzelm
parents: 4388
diff changeset
   537
wenzelm
parents: 4388
diff changeset
   538
* most internal names of constants changed due to qualified names;
wenzelm
parents: 4388
diff changeset
   539
wenzelm
parents: 4388
diff changeset
   540
* changed Pure/Sequence interface (see Pure/seq.ML);
wenzelm
parents: 4388
diff changeset
   541
3454
40b1287347d7 removed;
wenzelm
parents: 3338
diff changeset
   542
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   543
*** General Changes ***
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   544
4174
wenzelm
parents: 4154
diff changeset
   545
* hierachically structured name spaces (for consts, types, axms, thms
3943
b6e0c90f3bf4 tuned qualified names;
wenzelm
parents: 3930
diff changeset
   546
etc.); new lexical class 'longid' (e.g. Foo.bar.x) may render much of
4108
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   547
old input syntactically incorrect (e.g. "%x.x"); COMPATIBILITY:
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   548
isatool fixdots ensures space after dots (e.g. "%x. x"); set
4174
wenzelm
parents: 4154
diff changeset
   549
long_names for fully qualified output names; NOTE: ML programs
wenzelm
parents: 4154
diff changeset
   550
(special tactics, packages etc.) referring to internal names may have
wenzelm
parents: 4154
diff changeset
   551
to be adapted to cope with fully qualified names; in case of severe
wenzelm
parents: 4154
diff changeset
   552
backward campatibility problems try setting 'global_names' at compile
wenzelm
parents: 4154
diff changeset
   553
time to have enrything declared within a flat name space; one may also
wenzelm
parents: 4154
diff changeset
   554
fine tune name declarations in theories via the 'global' and 'local'
wenzelm
parents: 4154
diff changeset
   555
section;
4108
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   556
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   557
* reimplemented the implicit simpset and claset using the new anytype
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   558
data filed in signatures; references simpset:simpset ref etc. are
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   559
replaced by functions simpset:unit->simpset and
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   560
simpset_ref:unit->simpset ref; COMPATIBILITY: use isatool fixclasimp
1610602a2964 isatool fixclasimp;
wenzelm
parents: 4070
diff changeset
   561
to patch your ML files accordingly;
3856
177c64693954 rearranged and added TLA
paulson
parents: 3851
diff changeset
   562
3857
16198fde5af5 browser info;
wenzelm
parents: 3856
diff changeset
   563
* HTML output now includes theory graph data for display with Java
16198fde5af5 browser info;
wenzelm
parents: 3856
diff changeset
   564
applet or isatool browser; data generated automatically via isatool
3901
wenzelm
parents: 3871
diff changeset
   565
usedir (see -i option, ISABELLE_USEDIR_OPTIONS);
3857
16198fde5af5 browser info;
wenzelm
parents: 3856
diff changeset
   566
3856
177c64693954 rearranged and added TLA
paulson
parents: 3851
diff changeset
   567
* defs may now be conditional; improved rewrite_goals_tac to handle
177c64693954 rearranged and added TLA
paulson
parents: 3851
diff changeset
   568
conditional equations;
177c64693954 rearranged and added TLA
paulson
parents: 3851
diff changeset
   569
4174
wenzelm
parents: 4154
diff changeset
   570
* defs now admits additional type arguments, using TYPE('a) syntax;
wenzelm
parents: 4154
diff changeset
   571
3901
wenzelm
parents: 3871
diff changeset
   572
* theory aliases via merge (e.g. M=A+B+C) no longer supported, always
wenzelm
parents: 3871
diff changeset
   573
creates a new theory node; implicit merge of thms' signatures is
4112
wenzelm
parents: 4108
diff changeset
   574
restricted to 'trivial' ones; COMPATIBILITY: one may have to use
3901
wenzelm
parents: 3871
diff changeset
   575
transfer:theory->thm->thm in (rare) cases;
wenzelm
parents: 3871
diff changeset
   576
3968
ec138de716d9 improved handling of draft signatures / theories; draft thms (and
wenzelm
parents: 3964
diff changeset
   577
* improved handling of draft signatures / theories; draft thms (and
ec138de716d9 improved handling of draft signatures / theories; draft thms (and
wenzelm
parents: 3964
diff changeset
   578
ctyps, cterms) are automatically promoted to real ones;
ec138de716d9 improved handling of draft signatures / theories; draft thms (and
wenzelm
parents: 3964
diff changeset
   579
3901
wenzelm
parents: 3871
diff changeset
   580
* slightly changed interfaces for oracles: admit many per theory, named
wenzelm
parents: 3871
diff changeset
   581
(e.g. oracle foo = mlfun), additional name argument for invoke_oracle;
wenzelm
parents: 3871
diff changeset
   582
wenzelm
parents: 3871
diff changeset
   583
* print_goals: optional output of const types (set show_consts and
wenzelm
parents: 3871
diff changeset
   584
show_types);
3851
fe9932a7cd46 print_goals: optional output of const types (set show_consts);
wenzelm
parents: 3846
diff changeset
   585
4388
wenzelm
parents: 4381
diff changeset
   586
* improved output of warnings (###) and errors (***);
3697
c5833dfcc2cc Pure: fixed idt/idts vs. pttrn/pttrns syntactic categories;
wenzelm
parents: 3671
diff changeset
   587
4178
e64ff1c1bc70 subgoal_tac displays a warning if the new subgoal has type variables
paulson
parents: 4174
diff changeset
   588
* 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
   589
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   590
* removed old README and Makefiles;
3697
c5833dfcc2cc Pure: fixed idt/idts vs. pttrn/pttrns syntactic categories;
wenzelm
parents: 3671
diff changeset
   591
3856
177c64693954 rearranged and added TLA
paulson
parents: 3851
diff changeset
   592
* 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
   593
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   594
* removed obsolete init_pps and init_database;
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   595
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   596
* deleted the obsolete tactical STATE, which was declared by
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   597
    fun STATE tacfun st = tacfun st st;
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   598
4388
wenzelm
parents: 4381
diff changeset
   599
* cd and use now support path variables, e.g. $ISABELLE_HOME, or ~
wenzelm
parents: 4381
diff changeset
   600
(which abbreviates $HOME);
4269
a045600f0c98 cd, use etc. now support path variables;
wenzelm
parents: 4207
diff changeset
   601
a045600f0c98 cd, use etc. now support path variables;
wenzelm
parents: 4207
diff changeset
   602
* changed Pure/Sequence interface (see Pure/seq.ML); COMPATIBILITY:
a045600f0c98 cd, use etc. now support path variables;
wenzelm
parents: 4207
diff changeset
   603
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
   604
qualified references to the Sequence structure only!);
a045600f0c98 cd, use etc. now support path variables;
wenzelm
parents: 4207
diff changeset
   605
4381
wenzelm
parents: 4373
diff changeset
   606
* use_thy no longer requires writable current directory; it always
wenzelm
parents: 4373
diff changeset
   607
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
   608
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   609
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   610
*** Classical Reasoner ***
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   611
3744
wenzelm
parents: 3719
diff changeset
   612
* Clarify_tac, clarify_tac, clarify_step_tac, Clarify_step_tac: new
wenzelm
parents: 3719
diff changeset
   613
tactics that use classical reasoning to simplify a subgoal without
wenzelm
parents: 3719
diff changeset
   614
splitting it into several subgoals;
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   615
3719
6a142dab2a08 Safe_tac; qed_spec_mp in FOL
paulson
parents: 3715
diff changeset
   616
* Safe_tac: like safe_tac but uses the default claset;
6a142dab2a08 Safe_tac; qed_spec_mp in FOL
paulson
parents: 3715
diff changeset
   617
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   618
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   619
*** Simplifier ***
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   620
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   621
* added simplification meta rules:
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   622
    (asm_)(full_)simplify: simpset -> thm -> thm;
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   623
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   624
* simplifier.ML no longer part of Pure -- has to be loaded by object
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   625
logics (again);
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   626
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   627
* added prems argument to simplification procedures;
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   628
4325
e72cba5af6c5 addsplits now in FOL, ZF too
paulson
parents: 4269
diff changeset
   629
* HOL, FOL, ZF: added infix function `addsplits':
e72cba5af6c5 addsplits now in FOL, ZF too
paulson
parents: 4269
diff changeset
   630
  instead of `<simpset> setloop (split_tac <thms>)'
e72cba5af6c5 addsplits now in FOL, ZF too
paulson
parents: 4269
diff changeset
   631
  you can simply write `<simpset> addsplits <thms>'
e72cba5af6c5 addsplits now in FOL, ZF too
paulson
parents: 4269
diff changeset
   632
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   633
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   634
*** Syntax ***
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   635
4174
wenzelm
parents: 4154
diff changeset
   636
* TYPE('a) syntax for type reflection terms;
wenzelm
parents: 4154
diff changeset
   637
3985
wenzelm
parents: 3982
diff changeset
   638
* no longer handles consts with name "" -- declare as 'syntax' instead;
3856
177c64693954 rearranged and added TLA
paulson
parents: 3851
diff changeset
   639
177c64693954 rearranged and added TLA
paulson
parents: 3851
diff changeset
   640
* pretty printer: changed order of mixfix annotation preference (again!);
3846
6061fa463784 hierachically structured name spaces;
wenzelm
parents: 3822
diff changeset
   641
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   642
* Pure: fixed idt/idts vs. pttrn/pttrns syntactic categories;
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   643
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   644
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   645
*** HOL ***
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   646
5726
wenzelm
parents: 5722
diff changeset
   647
* 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
   648
  with `addloop' of the simplifier to faciliate case splitting in premises.
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   649
4035
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   650
* HOL/TLA: Stephan Merz's formalization of Lamport's Temporal Logic of Actions;
3985
wenzelm
parents: 3982
diff changeset
   651
wenzelm
parents: 3982
diff changeset
   652
* HOL/Auth: new protocol proofs including some for the Internet
4035
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   653
  protocol TLS;
3985
wenzelm
parents: 3982
diff changeset
   654
4125
wenzelm
parents: 4123
diff changeset
   655
* HOL/Map: new theory of `maps' a la VDM;
3982
2a903ba8d39e HOL/Map
nipkow
parents: 3968
diff changeset
   656
4335
b0acd74da01d nat_cancel simprocs;
wenzelm
parents: 4325
diff changeset
   657
* HOL/simplifier: simplification procedures nat_cancel_sums for
b0acd74da01d nat_cancel simprocs;
wenzelm
parents: 4325
diff changeset
   658
cancelling out common nat summands from =, <, <= (in)equalities, or
b0acd74da01d nat_cancel simprocs;
wenzelm
parents: 4325
diff changeset
   659
differences; simplification procedures nat_cancel_factor for
b0acd74da01d nat_cancel simprocs;
wenzelm
parents: 4325
diff changeset
   660
cancelling common factor from =, <, <= (in)equalities over natural
4373
2f831a45d571 nat_cancel enabled by default;
wenzelm
parents: 4370
diff changeset
   661
sums; nat_cancel contains both kinds of procedures, it is installed by
2f831a45d571 nat_cancel enabled by default;
wenzelm
parents: 4370
diff changeset
   662
default in Arith.thy -- this COULD MAKE EXISTING PROOFS FAIL;
4335
b0acd74da01d nat_cancel simprocs;
wenzelm
parents: 4325
diff changeset
   663
3580
04c6ae944b5e new simproc
nipkow
parents: 3579
diff changeset
   664
* HOL/simplifier: terms of the form
4325
e72cba5af6c5 addsplits now in FOL, ZF too
paulson
parents: 4269
diff changeset
   665
  `? x. P1(x) & ... & Pn(x) & x=t & Q1(x) & ... Qn(x)'  (or t=x)
3580
04c6ae944b5e new simproc
nipkow
parents: 3579
diff changeset
   666
  are rewritten to
4035
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   667
  `P1(t) & ... & Pn(t) & Q1(t) & ... Qn(t)',
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   668
  and those of the form
4325
e72cba5af6c5 addsplits now in FOL, ZF too
paulson
parents: 4269
diff changeset
   669
  `! 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
   670
  are rewritten to
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   671
  `P1(t) & ... & Pn(t) & Q1(t) & ... Qn(t) --> R(t)',
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   672
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   673
* HOL/datatype
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   674
  Each datatype `t' now comes with a theorem `split_t_case' of the form
3580
04c6ae944b5e new simproc
nipkow
parents: 3579
diff changeset
   675
4035
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   676
  P(t_case f1 ... fn x) =
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   677
     ( (!y1 ... ym1. x = C1 y1 ... ym1 --> P(f1 y1 ... ym1)) &
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   678
        ...
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   679
       (!y1 ... ymn. x = Cn y1 ... ymn --> P(f1 y1 ... ymn))
4035
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   680
     )
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   681
4930
89271bc4e7ed extended addsplits and delsplits to handle also split rules for assumptions
oheimb
parents: 4915
diff changeset
   682
  and a theorem `split_t_case_asm' of the form
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   683
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   684
  P(t_case f1 ... fn x) =
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   685
    ~( (? y1 ... ym1. x = C1 y1 ... ym1 & ~P(f1 y1 ... ym1)) |
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   686
        ...
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   687
       (? y1 ... ymn. x = Cn y1 ... ymn & ~P(f1 y1 ... ymn))
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   688
     )
4930
89271bc4e7ed extended addsplits and delsplits to handle also split rules for assumptions
oheimb
parents: 4915
diff changeset
   689
  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
   690
  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
   691
  split_list_case and split_option_case.
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   692
4361
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
   693
* HOL/Arithmetic:
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
   694
  - `pred n' is automatically converted to `n-1'.
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
   695
    Users are strongly encouraged not to use `pred' any longer,
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
   696
    because it will disappear altogether at some point.
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
   697
  - Users are strongly encouraged to write "0 < n" rather than
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
   698
    "n ~= 0". Theorems and proof tools have been modified towards this
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
   699
    `standard'.
4357
b852e2d2a39a n ~= 0 should become 0 < n
nipkow
parents: 4335
diff changeset
   700
4502
337c073de95e nth -> !
nipkow
parents: 4410
diff changeset
   701
* HOL/Lists:
337c073de95e nth -> !
nipkow
parents: 4410
diff changeset
   702
  the function "set_of_list" has been renamed "set" (and its theorems too);
337c073de95e nth -> !
nipkow
parents: 4410
diff changeset
   703
  the function "nth" now takes its arguments in the reverse order and
337c073de95e nth -> !
nipkow
parents: 4410
diff changeset
   704
  has acquired the infix notation "!" as in "xs!n".
3570
d3662f90c453 set_of_list -> set
paulson
parents: 3567
diff changeset
   705
4154
17a3a2c5a35f UNIV & UNION1
paulson
parents: 4125
diff changeset
   706
* HOL/Set: UNIV is now a constant and is no longer translated to Compl{};
17a3a2c5a35f UNIV & UNION1
paulson
parents: 4125
diff changeset
   707
17a3a2c5a35f UNIV & UNION1
paulson
parents: 4125
diff changeset
   708
* 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
   709
  specialist theorems (like UN1_I) are gone.  Similarly for (INT x.B x);
17a3a2c5a35f UNIV & UNION1
paulson
parents: 4125
diff changeset
   710
4575
e59cf7d816fe HOL/record;
wenzelm
parents: 4502
diff changeset
   711
* HOL/record: extensible records with schematic structural subtyping
e59cf7d816fe HOL/record;
wenzelm
parents: 4502
diff changeset
   712
(single inheritance); EXPERIMENTAL version demonstrating the encoding,
e59cf7d816fe HOL/record;
wenzelm
parents: 4502
diff changeset
   713
still lacks various theorems and concrete record syntax;
e59cf7d816fe HOL/record;
wenzelm
parents: 4502
diff changeset
   714
4125
wenzelm
parents: 4123
diff changeset
   715
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   716
*** HOLCF ***
3535
19bd6c8274c4 defs may now be conditional;
wenzelm
parents: 3511
diff changeset
   717
4125
wenzelm
parents: 4123
diff changeset
   718
* removed "axioms" and "generated by" sections;
wenzelm
parents: 4123
diff changeset
   719
4123
9600dd68d35b *** empty log message ***
oheimb
parents: 4112
diff changeset
   720
* replaced "ops" section by extended "consts" section, which is capable of
4125
wenzelm
parents: 4123
diff changeset
   721
  handling the continuous function space "->" directly;
wenzelm
parents: 4123
diff changeset
   722
wenzelm
parents: 4123
diff changeset
   723
* domain package:
wenzelm
parents: 4123
diff changeset
   724
  . proves theorems immediately and stores them in the theory,
wenzelm
parents: 4123
diff changeset
   725
  . creates hierachical name space,
wenzelm
parents: 4123
diff changeset
   726
  . now uses normal mixfix annotations (instead of cinfix...),
wenzelm
parents: 4123
diff changeset
   727
  . minor changes to some names and values (for consistency),
wenzelm
parents: 4123
diff changeset
   728
  . e.g. cases -> casedist, dists_eq -> dist_eqs, [take_lemma] -> take_lemmas,
wenzelm
parents: 4123
diff changeset
   729
  . separator between mutual domain defs: changed "," to "and",
wenzelm
parents: 4123
diff changeset
   730
  . improved handling of sort constraints;  now they have to
wenzelm
parents: 4123
diff changeset
   731
    appear on the left-hand side of the equations only;
4123
9600dd68d35b *** empty log message ***
oheimb
parents: 4112
diff changeset
   732
9600dd68d35b *** empty log message ***
oheimb
parents: 4112
diff changeset
   733
* fixed LAM <x,y,zs>.b syntax;
3567
e2539e1980b4 added simplification meta rules;
wenzelm
parents: 3561
diff changeset
   734
3744
wenzelm
parents: 3719
diff changeset
   735
* added extended adm_tac to simplifier in HOLCF -- can now discharge
wenzelm
parents: 3719
diff changeset
   736
adm (%x. P (t x)), where P is chainfinite and t continuous;
3579
8bd9b4b3b61d *** empty log message ***
wenzelm
parents: 3570
diff changeset
   737
8bd9b4b3b61d *** empty log message ***
wenzelm
parents: 3570
diff changeset
   738
3719
6a142dab2a08 Safe_tac; qed_spec_mp in FOL
paulson
parents: 3715
diff changeset
   739
*** FOL and ZF ***
6a142dab2a08 Safe_tac; qed_spec_mp in FOL
paulson
parents: 3715
diff changeset
   740
5726
wenzelm
parents: 5722
diff changeset
   741
* 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
   742
  with `addloop' of the simplifier to faciliate case splitting in premises.
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   743
3744
wenzelm
parents: 3719
diff changeset
   744
* qed_spec_mp, qed_goal_spec_mp, qed_goalw_spec_mp are available, as
wenzelm
parents: 3719
diff changeset
   745
in HOL, they strip ALL and --> from proved theorems;
wenzelm
parents: 3719
diff changeset
   746
3719
6a142dab2a08 Safe_tac; qed_spec_mp in FOL
paulson
parents: 3715
diff changeset
   747
3579
8bd9b4b3b61d *** empty log message ***
wenzelm
parents: 3570
diff changeset
   748
3006
wenzelm
parents: 3002
diff changeset
   749
New in Isabelle94-8 (May 1997)
wenzelm
parents: 3002
diff changeset
   750
------------------------------
2654
6efa602921d1 *** empty log message ***
wenzelm
parents: 2653
diff changeset
   751
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   752
*** General Changes ***
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   753
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   754
* 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
   755
still somewhat experimental); old Makefiles etc. still functional;
2971
c1e1e8406fb2 *** empty log message ***
wenzelm
parents: 2927
diff changeset
   756
3205
816a1f9fd620 *** empty log message ***
wenzelm
parents: 3116
diff changeset
   757
* new 'Isabelle System Manual';
816a1f9fd620 *** empty log message ***
wenzelm
parents: 3116
diff changeset
   758
2825
a94dba60d5f2 *** empty log message ***
wenzelm
parents: 2773
diff changeset
   759
* INSTALL text, together with ./configure and ./build scripts;
2773
36fdd908a26c *** empty log message ***
wenzelm
parents: 2756
diff changeset
   760
3006
wenzelm
parents: 3002
diff changeset
   761
* reimplemented type inference for greater efficiency, better error
wenzelm
parents: 3002
diff changeset
   762
messages and clean internal interface;
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   763
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   764
* 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
   765
setting goals_limit);
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   766
3006
wenzelm
parents: 3002
diff changeset
   767
wenzelm
parents: 3002
diff changeset
   768
*** Syntax ***
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   769
3116
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
   770
* supports alternative (named) syntax tables (parser and pretty
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
   771
printer); internal interface is provided by add_modesyntax(_i);
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
   772
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   773
* 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
   774
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
   775
"symbols" syntax table;
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   776
2705
d6e83a02061d *** empty log message ***
wenzelm
parents: 2654
diff changeset
   777
* added token_translation interface (may translate name tokens in
2756
643cba384a61 *** empty log message ***
wenzelm
parents: 2747
diff changeset
   778
arbitrary ways, dependent on their type (free, bound, tfree, ...) and
3116
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
   779
the current print_mode); IMPORTANT: user print translation functions
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
   780
are responsible for marking newly introduced bounds
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
   781
(Syntax.mark_boundT);
2705
d6e83a02061d *** empty log message ***
wenzelm
parents: 2654
diff changeset
   782
2730
865995b744f5 *** empty log message ***
wenzelm
parents: 2726
diff changeset
   783
* token translations for modes "xterm" and "xterm_color" that display
3006
wenzelm
parents: 3002
diff changeset
   784
names in bold, underline etc. or colors (which requires a color
wenzelm
parents: 3002
diff changeset
   785
version of xterm);
2730
865995b744f5 *** empty log message ***
wenzelm
parents: 2726
diff changeset
   786
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   787
* 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
   788
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   789
* added typed_print_translation (like print_translation, but may
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   790
access type of constant);
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   791
3006
wenzelm
parents: 3002
diff changeset
   792
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   793
*** Classical Reasoner ***
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   794
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   795
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
   796
some limitations.  Blast_tac...
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   797
  + ignores addss, addbefore, addafter; this restriction is intrinsic
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   798
  + ignores elimination rules that don't have the correct format
5726
wenzelm
parents: 5722
diff changeset
   799
        (the conclusion MUST be a formula variable)
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   800
  + ignores types, which can make HOL proofs fail
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   801
  + 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
   802
    [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
   803
  + 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
   804
3107
wenzelm
parents: 3042
diff changeset
   805
* substitution with equality assumptions no longer permutes other
wenzelm
parents: 3042
diff changeset
   806
assumptions;
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   807
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   808
* 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
   809
setwrapper to setWrapper and compwrapper to compWrapper; added safe wrapper
3107
wenzelm
parents: 3042
diff changeset
   810
(and access functions for it);
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   811
5726
wenzelm
parents: 5722
diff changeset
   812
* improved combination of classical reasoner and simplifier:
3317
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
   813
  + functions for handling clasimpsets
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
   814
  + improvement of addss: now the simplifier is called _after_ the
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
   815
    safe steps.
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
   816
  + safe variant of addss called addSss: uses safe simplifications
5726
wenzelm
parents: 5722
diff changeset
   817
    _during_ the safe steps. It is more complete as it allows multiple
3317
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
   818
    instantiations of unknowns (e.g. with slow_tac).
3006
wenzelm
parents: 3002
diff changeset
   819
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   820
*** Simplifier ***
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   821
3006
wenzelm
parents: 3002
diff changeset
   822
* added interface for simplification procedures (functions that
wenzelm
parents: 3002
diff changeset
   823
produce *proven* rewrite rules on the fly, depending on current
wenzelm
parents: 3002
diff changeset
   824
redex);
wenzelm
parents: 3002
diff changeset
   825
wenzelm
parents: 3002
diff changeset
   826
* ordering on terms as parameter (used for ordered rewriting);
wenzelm
parents: 3002
diff changeset
   827
3107
wenzelm
parents: 3042
diff changeset
   828
* 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
   829
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   830
* 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
   831
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
   832
functions setsolver and addsolver have been renamed to setSolver and
3107
wenzelm
parents: 3042
diff changeset
   833
addSolver; added safe_asm_full_simp_tac;
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   834
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   835
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   836
*** HOL ***
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   837
3042
21cd332b65d3 induct_tac
nipkow
parents: 3006
diff changeset
   838
* a generic induction tactic `induct_tac' which works for all datatypes and
3107
wenzelm
parents: 3042
diff changeset
   839
also for type `nat';
3042
21cd332b65d3 induct_tac
nipkow
parents: 3006
diff changeset
   840
3316
nipkow
parents: 3227
diff changeset
   841
* a generic case distinction tactic `exhaust_tac' which works for all
nipkow
parents: 3227
diff changeset
   842
datatypes and also for type `nat';
nipkow
parents: 3227
diff changeset
   843
nipkow
parents: 3227
diff changeset
   844
* each datatype comes with a function `size';
nipkow
parents: 3227
diff changeset
   845
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   846
* patterns in case expressions allow tuple patterns as arguments to
3107
wenzelm
parents: 3042
diff changeset
   847
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
   848
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   849
* primrec now also works with type nat;
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   850
3338
b99d750f6a37 Added recdef
paulson
parents: 3321
diff changeset
   851
* recdef: a new declaration form, allows general recursive functions to be
b99d750f6a37 Added recdef
paulson
parents: 3321
diff changeset
   852
defined in theory files.  See HOL/ex/Fib, HOL/ex/Primes, HOL/Subst/Unify.
b99d750f6a37 Added recdef
paulson
parents: 3321
diff changeset
   853
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   854
* the constant for negation has been renamed from "not" to "Not" to
3107
wenzelm
parents: 3042
diff changeset
   855
harmonize with FOL, ZF, LK, etc.;
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   856
3107
wenzelm
parents: 3042
diff changeset
   857
* HOL/ex/LFilter theory of a corecursive "filter" functional for
wenzelm
parents: 3042
diff changeset
   858
infinite lists;
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   859
3227
9190438471ea *** empty log message ***
wenzelm
parents: 3205
diff changeset
   860
* HOL/Modelcheck demonstrates invocation of model checker oracle;
9190438471ea *** empty log message ***
wenzelm
parents: 3205
diff changeset
   861
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   862
* 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
   863
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
   864
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   865
* more examples in HOL/MiniML and HOL/Auth;
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   866
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   867
* more default rewrite rules for quantifiers, union/intersection;
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   868
3321
c609a0119fd8 arbitrary
nipkow
parents: 3317
diff changeset
   869
* a new constant `arbitrary == @x.False';
c609a0119fd8 arbitrary
nipkow
parents: 3317
diff changeset
   870
3107
wenzelm
parents: 3042
diff changeset
   871
* HOLCF/IOA replaces old HOL/IOA;
wenzelm
parents: 3042
diff changeset
   872
5726
wenzelm
parents: 5722
diff changeset
   873
* HOLCF changes: derived all rules and arities
wenzelm
parents: 5722
diff changeset
   874
  + axiomatic type classes instead of classes
2653
f1a6997cdc06 described changes for HOLCF-Version without rules and arities
slotosch
parents: 2649
diff changeset
   875
  + typedef instead of faking type definitions
2747
9fdc1461085f Tidied and updated
paulson
parents: 2732
diff changeset
   876
  + eliminated the internal constants less_fun, less_cfun, UU_fun, UU_cfun etc.
2730
865995b744f5 *** empty log message ***
wenzelm
parents: 2726
diff changeset
   877
  + 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
   878
  + eliminated the types void, one, tr
f1a6997cdc06 described changes for HOLCF-Version without rules and arities
slotosch
parents: 2649
diff changeset
   879
  + 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
   880
  + eliminated blift from Lift3.thy (use Def instead of blift)
3107
wenzelm
parents: 3042
diff changeset
   881
  all eliminated rules are derived as theorems --> no visible changes ;
2649
2edc5b01e5a7 improved description of recent changes
oheimb
parents: 2639
diff changeset
   882
3006
wenzelm
parents: 3002
diff changeset
   883
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   884
*** ZF ***
2553
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
   885
2865
77daca16b2f4 ZF.thy is again usable
paulson
parents: 2825
diff changeset
   886
* 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
   887
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
   888
as ZF_cs addSIs [equalityI];
2553
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
   889
2554
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   890
2732
84fc9c3b6bf0 *** empty log message ***
wenzelm
parents: 2731
diff changeset
   891
2553
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
   892
New in Isabelle94-7 (November 96)
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
   893
---------------------------------
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
   894
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
   895
* allowing negative levels (as offsets) in prlev and choplev;
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
   896
2554
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   897
* super-linear speedup for large simplifications;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   898
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   899
* FOL, ZF and HOL now use miniscoping: rewriting pushes
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   900
quantifications in as far as possible (COULD MAKE EXISTING PROOFS
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   901
FAIL); can suppress it using the command Delsimps (ex_simps @
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   902
all_simps); De Morgan laws are also now included, by default;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   903
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   904
* improved printing of ==>  :  ~:
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   905
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   906
* new object-logic "Sequents" adds linear logic, while replacing LK
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   907
and Modal (thanks to Sara Kalvala);
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   908
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   909
* HOL/Auth: correctness proofs for authentication protocols;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   910
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   911
* HOL: new auto_tac combines rewriting and classical reasoning (many
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   912
examples on HOL/Auth);
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   913
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   914
* HOL: new command AddIffs for declaring theorems of the form P=Q to
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   915
the rewriter and classical reasoner simultaneously;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   916
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   917
* function uresult no longer returns theorems in "standard" format;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   918
regain previous version by: val uresult = standard o uresult;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   919
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   920
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   921
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   922
New in Isabelle94-6
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   923
-------------------
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   924
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   925
* oracles -- these establish an interface between Isabelle and trusted
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   926
external reasoners, which may deliver results as theorems;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   927
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   928
* proof objects (in particular record all uses of oracles);
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   929
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   930
* Simp_tac, Fast_tac, etc. that refer to implicit simpset / claset;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   931
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   932
* "constdefs" section in theory files;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   933
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   934
* "primrec" section (HOL) no longer requires names;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   935
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   936
* internal type "tactic" now simply "thm -> thm Sequence.seq";
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   937
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   938
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   939
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   940
New in Isabelle94-5
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   941
-------------------
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   942
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   943
* reduced space requirements;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   944
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   945
* automatic HTML generation from theories;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   946
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   947
* theory files no longer require "..." (quotes) around most types;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   948
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   949
* new examples, including two proofs of the Church-Rosser theorem;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   950
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   951
* non-curried (1994) version of HOL is no longer distributed;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   952
2553
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
   953
2557
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   954
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   955
New in Isabelle94-4
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   956
-------------------
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   957
2747
9fdc1461085f Tidied and updated
paulson
parents: 2732
diff changeset
   958
* greatly reduced space requirements;
2557
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   959
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   960
* theory files (.thy) no longer require \...\ escapes at line breaks;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   961
5726
wenzelm
parents: 5722
diff changeset
   962
* searchable theorem database (see the section "Retrieving theorems" on
2557
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   963
page 8 of the Reference Manual);
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   964
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   965
* new examples, including Grabczewski's monumental case study of the
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   966
Axiom of Choice;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   967
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   968
* The previous version of HOL renamed to Old_HOL;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   969
5726
wenzelm
parents: 5722
diff changeset
   970
* 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
   971
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
   972
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   973
* Mutually recursive inductive definitions finally work in HOL;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   974
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   975
* 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
   976
translates to the operator "split";
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   977
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   978
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   979
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   980
New in Isabelle94-3
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   981
-------------------
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   982
5726
wenzelm
parents: 5722
diff changeset
   983
* new infix operator, addss, allowing the classical reasoner to
2557
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   984
perform simplification at each step of its search.  Example:
5726
wenzelm
parents: 5722
diff changeset
   985
        fast_tac (cs addss ss)
2557
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   986
5726
wenzelm
parents: 5722
diff changeset
   987
* a new logic, CHOL, the same as HOL, but with a curried syntax
wenzelm
parents: 5722
diff changeset
   988
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
   989
look like (a,b) instead of <a,b>;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   990
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   991
* PLEASE NOTE: CHOL will eventually replace HOL!
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   992
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   993
* 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
   994
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
   995
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   996
* In ZF, integer numerals now denote two's-complement binary integers.
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   997
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
   998
5726
wenzelm
parents: 5722
diff changeset
   999
* Many new examples: I/O automata, Church-Rosser theorem, equivalents
2557
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1000
of the Axiom of Choice;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1001
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1002
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1003
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1004
New in Isabelle94-2
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1005
-------------------
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1006
5726
wenzelm
parents: 5722
diff changeset
  1007
* Significantly faster resolution;
2557
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1008
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1009
* 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
  1010
freely;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1011
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1012
* Database of theorems for FOL, HOL and ZF.  New
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1013
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
  1014
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1015
* 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
  1016
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
  1017
(theory_of_thm);
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1018
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1019
* Bugs fixed in the inductive definition and datatype packages;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1020
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1021
* 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
  1022
and HOL_dup_cs obsolete;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1023
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1024
* 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
  1025
have been removed;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1026
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1027
* Simpler definition of function space in ZF;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1028
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1029
* new results about cardinal and ordinal arithmetic in ZF;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1030
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1031
* '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
  1032
types;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1033
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
  1034
2553
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
  1035
$Id$