NEWS
author wenzelm
Tue, 04 Aug 1998 18:23:28 +0200
changeset 5247 4a8e6e60bbf8
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child 5251 fee54d5c511c
permissions -rw-r--r--
Locale.setup;
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Isabelle NEWS -- history of user-visible changes
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================================================
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
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New in this Isabelle version
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----------------------------
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*** Overview of INCOMPATIBILITIES (see below for more details) ***
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* several changes of proof tools;
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* HOL: major changes to the inductive and datatype packages;
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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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1ff6679144b9 ZF: Main, Update
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*** Proof tools ***
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* Simplifier: 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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* 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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* HOL/split_all_tac is now much faster and fails if there is nothing
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to split.  Existing (fragile) proofs may require adaption because the
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order and the names of the automatically generated variables have
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changed.  split_all_tac has moved within claset() from unsafe wrappers
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to safe wrappers, which means that !!-bound variables are split much
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more aggressively, and safe_tac and clarify_tac now split such
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variables.  If this splitting is not appropriate, use delSWrapper
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"split_all_tac".
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* HOL/Simplifier:
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 - Rewrite rules for case distinctions can now be added permanently to
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   the default simpset using Addsplits just like Addsimps. They can be
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   removed via Delsplits just like Delsimps. Lower-case versions are
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   also available.
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 - The rule split_if is now part of the default simpset. This means
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   that the simplifier will eliminate all occurrences of if-then-else
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   in the conclusion of a goal. To prevent this, you can either remove
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   split_if completely from the default simpset by `Delsplits
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   [split_if]' or remove it in a specific call of the simplifier using
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   `... delsplits [split_if]'.  You can also add/delete other case
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   splitting rules to/from the default simpset: every datatype
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   generates suitable rules `split_t_case' and `split_t_case_asm'
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   (where 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 '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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*** HOL ***
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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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The new tactic  mutual_induct_tac [<var_1>, ..., <var_n>] i  performs
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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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<function_name>.simps.
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INCOMPATIBILITIES:
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  - Theories using datatypes must now have theory Datatype as an
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    ancestor.
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  - The specific <typename>.induct_tac no longer exists - use the
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    generic induct_tac instead.
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  - natE has been renamed to nat.exhaust - use exhaust_tac
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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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  - The theorems split_<typename>_case and split_<typename>_case_asm
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    have been renamed to <typename>.split and <typename>.split_asm.
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  - Since default sorts of type variables are now handled correctly,
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    some datatype definitions may have to be annotated with explicit
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    sort constraints.
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  - Primrec definitions no longer require function name and type
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    of recursive argument.
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Consider using isatool fixdatatype to adapt your theories and proof
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scripts to the new package (backup your sources first!).
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* HOL/record package: now includes concrete syntax for record types,
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terms, updates; still lacks important theorems, like surjective
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pairing and split;
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* reorganized the main HOL image: HOL/Integ and String loaded by
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default; theory Main includes everything;
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* added option_map_eq_Some to the default simpset claset;
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* added disj_not1 = "(~P | Q) = (P --> Q)" to the default simpset;
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* many new identities for unions, intersections, set difference, etc.;
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* expand_if, expand_split, expand_sum_case and expand_nat_case are now
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called split_if, split_split, split_sum_case and split_nat_case (to go
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with add/delsplits);
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* HOL/Prod introduces simplification procedure unit_eq_proc rewriting
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(?x::unit) = (); this is made part of the default simpset, which COULD
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MAKE EXISTING PROOFS FAIL under rare circumstances (consider
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'Delsimprocs [unit_eq_proc];' as last resort); also note that
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unit_abs_eta_conv is added in order to counter the effect of
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unit_eq_proc on (%u::unit. f u), replacing it by f rather than by
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%u.f();
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* HOL/Fun INCOMPATIBILITY: `inj_onto' is now called `inj_on' (which
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makes more sense);
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* HOL/Relation INCOMPATIBILITY: renamed the relational operator r^-1
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to 'converse' from 'inverse' (for compatibility with ZF and some
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literature);
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* HOL/recdef can now declare non-recursive functions, with {} supplied as
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the well-founded relation;
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* HOL/Update: new theory of function updates:
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    f(a:=b) == %x. if x=a then b else f x
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may also be iterated as in f(a:=b,c:=d,...);
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* HOL/Vimage: new theory for inverse image of a function, syntax f-``B;
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* HOL/List: new function list_update written xs[i:=v] that updates the i-th
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  list position. May also be iterated as in xs[i:=a,j:=b,...].
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* HOL/Arith:
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  - removed 'pred' (predecessor) function;
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  - generalized some theorems about n-1;
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  - many new laws about "div" and "mod";
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  - new laws about greatest common divisors (see theory ex/Primes);
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* HOL/Relation: renamed the relational operator r^-1 "converse"
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instead of "inverse";
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* HOL/Set: added the predicate "disjoint A B" that stands for "A <= Compl B".
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  This is much better than "A Int B = {}" for Fast/Blast_tac.
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* directory HOL/Real: a construction of the reals using Dedekind cuts
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(not included by default);
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* directory HOL/UNITY: Chandy and Misra's UNITY formalism;
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* calling (stac rew i) now fails if "rew" has no effect on the goal
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  [previously, this check worked only if the rewrite rule was unconditional]
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*** ZF ***
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* theory Main includes everything;
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* ZF/Update: new theory of function updates
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    with default rewrite rule  f(x:=y) ` z = if(z=x, y, f`z)
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  may also be iterated as in f(a:=b,c:=d,...);
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* in  let x=t in u(x), neither t nor u(x) has to be an FOL term.
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* calling (stac rew i) now fails if "rew" has no effect on the goal
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  [previously, this check worked only if the rewrite rule was unconditional]
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* case_tac provided for compatibility with HOL
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    (like the old excluded_middle_tac, but with subgoals swapped)
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*** Internal programming interfaces ***
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* removed global_names compatibility flag -- all theory declarations
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are qualified by default;
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* improved the theory data mechanism to support encapsulation (data
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kind name replaced by private Object.kind, acting as authorization
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key); new type-safe user interface via functor TheoryDataFun;
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* module Pure/Syntax now offers quote / antiquote translation
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functions (useful for Hoare logic etc. with implicit dependencies);
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* Simplifier now offers conversions (asm_)(full_)rewrite: simpset ->
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cterm -> thm;
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* Pure: several new basic modules made available for general use, see
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also src/Pure/README;
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* new tactical CHANGED_GOAL for checking that a tactic modifies a
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subgoal;
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7b4c2a153738 * improved the theory data mechanism to support real encapsulation;
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New in Isabelle98 (January 1998)
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--------------------------------
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*** Overview of INCOMPATIBILITIES (see below for more details) ***
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* changed lexical syntax of terms / types: dots made part of long
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identifiers, e.g. "%x.x" no longer possible, should be "%x. x";
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* simpset (and claset) reference variable replaced by functions
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simpset / simpset_ref;
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* no longer supports theory aliases (via merge) and non-trivial
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implicit merge of thms' signatures;
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* most internal names of constants changed due to qualified names;
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* changed Pure/Sequence interface (see Pure/seq.ML);
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*** General Changes ***
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* hierachically structured name spaces (for consts, types, axms, thms
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etc.); new lexical class 'longid' (e.g. Foo.bar.x) may render much of
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old input syntactically incorrect (e.g. "%x.x"); COMPATIBILITY:
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isatool fixdots ensures space after dots (e.g. "%x. x"); set
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long_names for fully qualified output names; NOTE: ML programs
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(special tactics, packages etc.) referring to internal names may have
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to be adapted to cope with fully qualified names; in case of severe
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backward campatibility problems try setting 'global_names' at compile
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time to have enrything declared within a flat name space; one may also
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fine tune name declarations in theories via the 'global' and 'local'
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section;
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1610602a2964 isatool fixclasimp;
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* reimplemented the implicit simpset and claset using the new anytype
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data filed in signatures; references simpset:simpset ref etc. are
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replaced by functions simpset:unit->simpset and
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simpset_ref:unit->simpset ref; COMPATIBILITY: use isatool fixclasimp
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to patch your ML files accordingly;
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* HTML output now includes theory graph data for display with Java
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applet or isatool browser; data generated automatically via isatool
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usedir (see -i option, ISABELLE_USEDIR_OPTIONS);
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* defs may now be conditional; improved rewrite_goals_tac to handle
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conditional equations;
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* defs now admits additional type arguments, using TYPE('a) syntax;
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* theory aliases via merge (e.g. M=A+B+C) no longer supported, always
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creates a new theory node; implicit merge of thms' signatures is
4112
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restricted to 'trivial' ones; COMPATIBILITY: one may have to use
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transfer:theory->thm->thm in (rare) cases;
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* improved handling of draft signatures / theories; draft thms (and
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ctyps, cterms) are automatically promoted to real ones;
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* slightly changed interfaces for oracles: admit many per theory, named
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(e.g. oracle foo = mlfun), additional name argument for invoke_oracle;
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* print_goals: optional output of const types (set show_consts and
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show_types);
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* improved output of warnings (###) and errors (***);
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* subgoal_tac displays a warning if the new subgoal has type variables;
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* removed old README and Makefiles;
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* replaced print_goals_ref hook by print_current_goals_fn and result_error_fn;
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* removed obsolete init_pps and init_database;
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* deleted the obsolete tactical STATE, which was declared by
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    fun STATE tacfun st = tacfun st st;
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* cd and use now support path variables, e.g. $ISABELLE_HOME, or ~
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(which abbreviates $HOME);
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* changed Pure/Sequence interface (see Pure/seq.ML); COMPATIBILITY:
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use isatool fixseq to adapt your ML programs (this works for fully
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qualified references to the Sequence structure only!);
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4381
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* use_thy no longer requires writable current directory; it always
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reloads .ML *and* .thy file, if either one is out of date;
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*** Classical Reasoner ***
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3744
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* Clarify_tac, clarify_tac, clarify_step_tac, Clarify_step_tac: new
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tactics that use classical reasoning to simplify a subgoal without
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splitting it into several subgoals;
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* Safe_tac: like safe_tac but uses the default claset;
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*** Simplifier ***
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* added simplification meta rules:
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    (asm_)(full_)simplify: simpset -> thm -> thm;
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* simplifier.ML no longer part of Pure -- has to be loaded by object
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logics (again);
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* added prems argument to simplification procedures;
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* HOL, FOL, ZF: added infix function `addsplits':
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  instead of `<simpset> setloop (split_tac <thms>)'
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  you can simply write `<simpset> addsplits <thms>'
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*** Syntax ***
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* TYPE('a) syntax for type reflection terms;
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3985
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* no longer handles consts with name "" -- declare as 'syntax' instead;
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* pretty printer: changed order of mixfix annotation preference (again!);
3846
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* Pure: fixed idt/idts vs. pttrn/pttrns syntactic categories;
6e074b41c735 Clarify_tac; general reorganization
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   384
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   385
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   386
*** HOL ***
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   387
4207
061919f8da9c renamed split_prem_tac to split_asm_tac
oheimb
parents: 4189
diff changeset
   388
* 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
   389
  with `addloop' of the simplifier to faciliate case splitting in premises.
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   390
4035
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   391
* HOL/TLA: Stephan Merz's formalization of Lamport's Temporal Logic of Actions;
3985
wenzelm
parents: 3982
diff changeset
   392
wenzelm
parents: 3982
diff changeset
   393
* HOL/Auth: new protocol proofs including some for the Internet
4035
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   394
  protocol TLS;
3985
wenzelm
parents: 3982
diff changeset
   395
4125
wenzelm
parents: 4123
diff changeset
   396
* HOL/Map: new theory of `maps' a la VDM;
3982
2a903ba8d39e HOL/Map
nipkow
parents: 3968
diff changeset
   397
4335
b0acd74da01d nat_cancel simprocs;
wenzelm
parents: 4325
diff changeset
   398
* HOL/simplifier: simplification procedures nat_cancel_sums for
b0acd74da01d nat_cancel simprocs;
wenzelm
parents: 4325
diff changeset
   399
cancelling out common nat summands from =, <, <= (in)equalities, or
b0acd74da01d nat_cancel simprocs;
wenzelm
parents: 4325
diff changeset
   400
differences; simplification procedures nat_cancel_factor for
b0acd74da01d nat_cancel simprocs;
wenzelm
parents: 4325
diff changeset
   401
cancelling common factor from =, <, <= (in)equalities over natural
4373
2f831a45d571 nat_cancel enabled by default;
wenzelm
parents: 4370
diff changeset
   402
sums; nat_cancel contains both kinds of procedures, it is installed by
2f831a45d571 nat_cancel enabled by default;
wenzelm
parents: 4370
diff changeset
   403
default in Arith.thy -- this COULD MAKE EXISTING PROOFS FAIL;
4335
b0acd74da01d nat_cancel simprocs;
wenzelm
parents: 4325
diff changeset
   404
3580
04c6ae944b5e new simproc
nipkow
parents: 3579
diff changeset
   405
* HOL/simplifier: terms of the form
4325
e72cba5af6c5 addsplits now in FOL, ZF too
paulson
parents: 4269
diff changeset
   406
  `? x. P1(x) & ... & Pn(x) & x=t & Q1(x) & ... Qn(x)'  (or t=x)
3580
04c6ae944b5e new simproc
nipkow
parents: 3579
diff changeset
   407
  are rewritten to
4035
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   408
  `P1(t) & ... & Pn(t) & Q1(t) & ... Qn(t)',
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   409
  and those of the form
4325
e72cba5af6c5 addsplits now in FOL, ZF too
paulson
parents: 4269
diff changeset
   410
  `! 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
   411
  are rewritten to
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   412
  `P1(t) & ... & Pn(t) & Q1(t) & ... Qn(t) --> R(t)',
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   413
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   414
* HOL/datatype
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   415
  Each datatype `t' now comes with a theorem `split_t_case' of the form
3580
04c6ae944b5e new simproc
nipkow
parents: 3579
diff changeset
   416
4035
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   417
  P(t_case f1 ... fn x) =
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   418
     ( (!y1 ... ym1. x = C1 y1 ... ym1 --> P(f1 y1 ... ym1)) &
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   419
        ...
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   420
       (!y1 ... ymn. x = Cn y1 ... ymn --> P(f1 y1 ... ymn))
4035
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   421
     )
6ffbc7b11abd *** empty log message ***
nipkow
parents: 3985
diff changeset
   422
4930
89271bc4e7ed extended addsplits and delsplits to handle also split rules for assumptions
oheimb
parents: 4915
diff changeset
   423
  and a theorem `split_t_case_asm' of the form
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   424
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   425
  P(t_case f1 ... fn x) =
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   426
    ~( (? y1 ... ym1. x = C1 y1 ... ym1 & ~P(f1 y1 ... ym1)) |
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   427
        ...
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   428
       (? y1 ... ymn. x = Cn y1 ... ymn & ~P(f1 y1 ... ymn))
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   429
     )
4930
89271bc4e7ed extended addsplits and delsplits to handle also split rules for assumptions
oheimb
parents: 4915
diff changeset
   430
  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
   431
  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
   432
  split_list_case and split_option_case.
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   433
4361
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
   434
* HOL/Arithmetic:
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
   435
  - `pred n' is automatically converted to `n-1'.
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
   436
    Users are strongly encouraged not to use `pred' any longer,
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
   437
    because it will disappear altogether at some point.
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
   438
  - Users are strongly encouraged to write "0 < n" rather than
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
   439
    "n ~= 0". Theorems and proof tools have been modified towards this
c77a484e4f95 pred -> -1
nipkow
parents: 4357
diff changeset
   440
    `standard'.
4357
b852e2d2a39a n ~= 0 should become 0 < n
nipkow
parents: 4335
diff changeset
   441
4502
337c073de95e nth -> !
nipkow
parents: 4410
diff changeset
   442
* HOL/Lists:
337c073de95e nth -> !
nipkow
parents: 4410
diff changeset
   443
  the function "set_of_list" has been renamed "set" (and its theorems too);
337c073de95e nth -> !
nipkow
parents: 4410
diff changeset
   444
  the function "nth" now takes its arguments in the reverse order and
337c073de95e nth -> !
nipkow
parents: 4410
diff changeset
   445
  has acquired the infix notation "!" as in "xs!n".
3570
d3662f90c453 set_of_list -> set
paulson
parents: 3567
diff changeset
   446
4154
17a3a2c5a35f UNIV & UNION1
paulson
parents: 4125
diff changeset
   447
* HOL/Set: UNIV is now a constant and is no longer translated to Compl{};
17a3a2c5a35f UNIV & UNION1
paulson
parents: 4125
diff changeset
   448
17a3a2c5a35f UNIV & UNION1
paulson
parents: 4125
diff changeset
   449
* 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
   450
  specialist theorems (like UN1_I) are gone.  Similarly for (INT x.B x);
17a3a2c5a35f UNIV & UNION1
paulson
parents: 4125
diff changeset
   451
4575
e59cf7d816fe HOL/record;
wenzelm
parents: 4502
diff changeset
   452
* HOL/record: extensible records with schematic structural subtyping
e59cf7d816fe HOL/record;
wenzelm
parents: 4502
diff changeset
   453
(single inheritance); EXPERIMENTAL version demonstrating the encoding,
e59cf7d816fe HOL/record;
wenzelm
parents: 4502
diff changeset
   454
still lacks various theorems and concrete record syntax;
e59cf7d816fe HOL/record;
wenzelm
parents: 4502
diff changeset
   455
4125
wenzelm
parents: 4123
diff changeset
   456
3715
6e074b41c735 Clarify_tac; general reorganization
paulson
parents: 3697
diff changeset
   457
*** HOLCF ***
3535
19bd6c8274c4 defs may now be conditional;
wenzelm
parents: 3511
diff changeset
   458
4125
wenzelm
parents: 4123
diff changeset
   459
* removed "axioms" and "generated by" sections;
wenzelm
parents: 4123
diff changeset
   460
4123
9600dd68d35b *** empty log message ***
oheimb
parents: 4112
diff changeset
   461
* replaced "ops" section by extended "consts" section, which is capable of
4125
wenzelm
parents: 4123
diff changeset
   462
  handling the continuous function space "->" directly;
wenzelm
parents: 4123
diff changeset
   463
wenzelm
parents: 4123
diff changeset
   464
* domain package:
wenzelm
parents: 4123
diff changeset
   465
  . proves theorems immediately and stores them in the theory,
wenzelm
parents: 4123
diff changeset
   466
  . creates hierachical name space,
wenzelm
parents: 4123
diff changeset
   467
  . now uses normal mixfix annotations (instead of cinfix...),
wenzelm
parents: 4123
diff changeset
   468
  . minor changes to some names and values (for consistency),
wenzelm
parents: 4123
diff changeset
   469
  . e.g. cases -> casedist, dists_eq -> dist_eqs, [take_lemma] -> take_lemmas,
wenzelm
parents: 4123
diff changeset
   470
  . separator between mutual domain defs: changed "," to "and",
wenzelm
parents: 4123
diff changeset
   471
  . improved handling of sort constraints;  now they have to
wenzelm
parents: 4123
diff changeset
   472
    appear on the left-hand side of the equations only;
4123
9600dd68d35b *** empty log message ***
oheimb
parents: 4112
diff changeset
   473
9600dd68d35b *** empty log message ***
oheimb
parents: 4112
diff changeset
   474
* fixed LAM <x,y,zs>.b syntax;
3567
e2539e1980b4 added simplification meta rules;
wenzelm
parents: 3561
diff changeset
   475
3744
wenzelm
parents: 3719
diff changeset
   476
* added extended adm_tac to simplifier in HOLCF -- can now discharge
wenzelm
parents: 3719
diff changeset
   477
adm (%x. P (t x)), where P is chainfinite and t continuous;
3579
8bd9b4b3b61d *** empty log message ***
wenzelm
parents: 3570
diff changeset
   478
8bd9b4b3b61d *** empty log message ***
wenzelm
parents: 3570
diff changeset
   479
3719
6a142dab2a08 Safe_tac; qed_spec_mp in FOL
paulson
parents: 3715
diff changeset
   480
*** FOL and ZF ***
6a142dab2a08 Safe_tac; qed_spec_mp in FOL
paulson
parents: 3715
diff changeset
   481
4207
061919f8da9c renamed split_prem_tac to split_asm_tac
oheimb
parents: 4189
diff changeset
   482
* 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
   483
  with `addloop' of the simplifier to faciliate case splitting in premises.
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 4178
diff changeset
   484
3744
wenzelm
parents: 3719
diff changeset
   485
* qed_spec_mp, qed_goal_spec_mp, qed_goalw_spec_mp are available, as
wenzelm
parents: 3719
diff changeset
   486
in HOL, they strip ALL and --> from proved theorems;
wenzelm
parents: 3719
diff changeset
   487
3719
6a142dab2a08 Safe_tac; qed_spec_mp in FOL
paulson
parents: 3715
diff changeset
   488
3579
8bd9b4b3b61d *** empty log message ***
wenzelm
parents: 3570
diff changeset
   489
3006
wenzelm
parents: 3002
diff changeset
   490
New in Isabelle94-8 (May 1997)
wenzelm
parents: 3002
diff changeset
   491
------------------------------
2654
6efa602921d1 *** empty log message ***
wenzelm
parents: 2653
diff changeset
   492
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   493
*** General Changes ***
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   494
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   495
* 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
   496
still somewhat experimental); old Makefiles etc. still functional;
2971
c1e1e8406fb2 *** empty log message ***
wenzelm
parents: 2927
diff changeset
   497
3205
816a1f9fd620 *** empty log message ***
wenzelm
parents: 3116
diff changeset
   498
* new 'Isabelle System Manual';
816a1f9fd620 *** empty log message ***
wenzelm
parents: 3116
diff changeset
   499
2825
a94dba60d5f2 *** empty log message ***
wenzelm
parents: 2773
diff changeset
   500
* INSTALL text, together with ./configure and ./build scripts;
2773
36fdd908a26c *** empty log message ***
wenzelm
parents: 2756
diff changeset
   501
3006
wenzelm
parents: 3002
diff changeset
   502
* reimplemented type inference for greater efficiency, better error
wenzelm
parents: 3002
diff changeset
   503
messages and clean internal interface;
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   504
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   505
* 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
   506
setting goals_limit);
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   507
3006
wenzelm
parents: 3002
diff changeset
   508
wenzelm
parents: 3002
diff changeset
   509
*** Syntax ***
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   510
3116
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
   511
* supports alternative (named) syntax tables (parser and pretty
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
   512
printer); internal interface is provided by add_modesyntax(_i);
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
   513
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   514
* 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
   515
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
   516
"symbols" syntax table;
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   517
2705
d6e83a02061d *** empty log message ***
wenzelm
parents: 2654
diff changeset
   518
* added token_translation interface (may translate name tokens in
2756
643cba384a61 *** empty log message ***
wenzelm
parents: 2747
diff changeset
   519
arbitrary ways, dependent on their type (free, bound, tfree, ...) and
3116
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
   520
the current print_mode); IMPORTANT: user print translation functions
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
   521
are responsible for marking newly introduced bounds
b890bae4273e *** empty log message ***
wenzelm
parents: 3107
diff changeset
   522
(Syntax.mark_boundT);
2705
d6e83a02061d *** empty log message ***
wenzelm
parents: 2654
diff changeset
   523
2730
865995b744f5 *** empty log message ***
wenzelm
parents: 2726
diff changeset
   524
* token translations for modes "xterm" and "xterm_color" that display
3006
wenzelm
parents: 3002
diff changeset
   525
names in bold, underline etc. or colors (which requires a color
wenzelm
parents: 3002
diff changeset
   526
version of xterm);
2730
865995b744f5 *** empty log message ***
wenzelm
parents: 2726
diff changeset
   527
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   528
* 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
   529
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   530
* added typed_print_translation (like print_translation, but may
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   531
access type of constant);
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   532
3006
wenzelm
parents: 3002
diff changeset
   533
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   534
*** Classical Reasoner ***
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   535
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   536
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
   537
some limitations.  Blast_tac...
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   538
  + ignores addss, addbefore, addafter; this restriction is intrinsic
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   539
  + ignores elimination rules that don't have the correct format
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   540
	(the conclusion MUST be a formula variable)
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   541
  + ignores types, which can make HOL proofs fail
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   542
  + 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
   543
    [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
   544
  + 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
   545
3107
wenzelm
parents: 3042
diff changeset
   546
* substitution with equality assumptions no longer permutes other
wenzelm
parents: 3042
diff changeset
   547
assumptions;
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   548
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   549
* 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
   550
setwrapper to setWrapper and compwrapper to compWrapper; added safe wrapper
3107
wenzelm
parents: 3042
diff changeset
   551
(and access functions for it);
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   552
3317
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
   553
* improved combination of classical reasoner and simplifier: 
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
   554
  + functions for handling clasimpsets
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
   555
  + improvement of addss: now the simplifier is called _after_ the
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
   556
    safe steps.
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
   557
  + safe variant of addss called addSss: uses safe simplifications
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
   558
    _during_ the safe steps. It is more complete as it allows multiple 
2cfb98c49c42 adapted entry for addss, addSss
oheimb
parents: 3316
diff changeset
   559
    instantiations of unknowns (e.g. with slow_tac).
3006
wenzelm
parents: 3002
diff changeset
   560
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   561
*** Simplifier ***
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   562
3006
wenzelm
parents: 3002
diff changeset
   563
* added interface for simplification procedures (functions that
wenzelm
parents: 3002
diff changeset
   564
produce *proven* rewrite rules on the fly, depending on current
wenzelm
parents: 3002
diff changeset
   565
redex);
wenzelm
parents: 3002
diff changeset
   566
wenzelm
parents: 3002
diff changeset
   567
* ordering on terms as parameter (used for ordered rewriting);
wenzelm
parents: 3002
diff changeset
   568
3107
wenzelm
parents: 3042
diff changeset
   569
* 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
   570
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   571
* 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
   572
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
   573
functions setsolver and addsolver have been renamed to setSolver and
3107
wenzelm
parents: 3042
diff changeset
   574
addSolver; added safe_asm_full_simp_tac;
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   575
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   576
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   577
*** HOL ***
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   578
3042
21cd332b65d3 induct_tac
nipkow
parents: 3006
diff changeset
   579
* a generic induction tactic `induct_tac' which works for all datatypes and
3107
wenzelm
parents: 3042
diff changeset
   580
also for type `nat';
3042
21cd332b65d3 induct_tac
nipkow
parents: 3006
diff changeset
   581
3316
nipkow
parents: 3227
diff changeset
   582
* a generic case distinction tactic `exhaust_tac' which works for all
nipkow
parents: 3227
diff changeset
   583
datatypes and also for type `nat';
nipkow
parents: 3227
diff changeset
   584
nipkow
parents: 3227
diff changeset
   585
* each datatype comes with a function `size';
nipkow
parents: 3227
diff changeset
   586
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   587
* patterns in case expressions allow tuple patterns as arguments to
3107
wenzelm
parents: 3042
diff changeset
   588
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
   589
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   590
* primrec now also works with type nat;
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   591
3338
b99d750f6a37 Added recdef
paulson
parents: 3321
diff changeset
   592
* recdef: a new declaration form, allows general recursive functions to be
b99d750f6a37 Added recdef
paulson
parents: 3321
diff changeset
   593
defined in theory files.  See HOL/ex/Fib, HOL/ex/Primes, HOL/Subst/Unify.
b99d750f6a37 Added recdef
paulson
parents: 3321
diff changeset
   594
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   595
* the constant for negation has been renamed from "not" to "Not" to
3107
wenzelm
parents: 3042
diff changeset
   596
harmonize with FOL, ZF, LK, etc.;
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   597
3107
wenzelm
parents: 3042
diff changeset
   598
* HOL/ex/LFilter theory of a corecursive "filter" functional for
wenzelm
parents: 3042
diff changeset
   599
infinite lists;
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   600
3227
9190438471ea *** empty log message ***
wenzelm
parents: 3205
diff changeset
   601
* HOL/Modelcheck demonstrates invocation of model checker oracle;
9190438471ea *** empty log message ***
wenzelm
parents: 3205
diff changeset
   602
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   603
* 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
   604
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
   605
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   606
* more examples in HOL/MiniML and HOL/Auth;
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   607
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   608
* more default rewrite rules for quantifiers, union/intersection;
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   609
3321
c609a0119fd8 arbitrary
nipkow
parents: 3317
diff changeset
   610
* a new constant `arbitrary == @x.False';
c609a0119fd8 arbitrary
nipkow
parents: 3317
diff changeset
   611
3107
wenzelm
parents: 3042
diff changeset
   612
* HOLCF/IOA replaces old HOL/IOA;
wenzelm
parents: 3042
diff changeset
   613
2653
f1a6997cdc06 described changes for HOLCF-Version without rules and arities
slotosch
parents: 2649
diff changeset
   614
* HOLCF changes: derived all rules and arities 
f1a6997cdc06 described changes for HOLCF-Version without rules and arities
slotosch
parents: 2649
diff changeset
   615
  + axiomatic type classes instead of classes 
f1a6997cdc06 described changes for HOLCF-Version without rules and arities
slotosch
parents: 2649
diff changeset
   616
  + typedef instead of faking type definitions
2747
9fdc1461085f Tidied and updated
paulson
parents: 2732
diff changeset
   617
  + eliminated the internal constants less_fun, less_cfun, UU_fun, UU_cfun etc.
2730
865995b744f5 *** empty log message ***
wenzelm
parents: 2726
diff changeset
   618
  + 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
   619
  + eliminated the types void, one, tr
f1a6997cdc06 described changes for HOLCF-Version without rules and arities
slotosch
parents: 2649
diff changeset
   620
  + 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
   621
  + eliminated blift from Lift3.thy (use Def instead of blift)
3107
wenzelm
parents: 3042
diff changeset
   622
  all eliminated rules are derived as theorems --> no visible changes ;
2649
2edc5b01e5a7 improved description of recent changes
oheimb
parents: 2639
diff changeset
   623
3006
wenzelm
parents: 3002
diff changeset
   624
3002
223e5d65faaa Reorganized under headings. Also documented Blast_tac and LFilter
paulson
parents: 2993
diff changeset
   625
*** ZF ***
2553
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
   626
2865
77daca16b2f4 ZF.thy is again usable
paulson
parents: 2825
diff changeset
   627
* 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
   628
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
   629
as ZF_cs addSIs [equalityI];
2553
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
   630
2554
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   631
2732
84fc9c3b6bf0 *** empty log message ***
wenzelm
parents: 2731
diff changeset
   632
2553
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
   633
New in Isabelle94-7 (November 96)
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
   634
---------------------------------
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
   635
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
   636
* allowing negative levels (as offsets) in prlev and choplev;
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
   637
2554
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   638
* super-linear speedup for large simplifications;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   639
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   640
* FOL, ZF and HOL now use miniscoping: rewriting pushes
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   641
quantifications in as far as possible (COULD MAKE EXISTING PROOFS
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   642
FAIL); can suppress it using the command Delsimps (ex_simps @
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   643
all_simps); De Morgan laws are also now included, by default;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   644
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   645
* improved printing of ==>  :  ~:
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   646
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   647
* new object-logic "Sequents" adds linear logic, while replacing LK
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   648
and Modal (thanks to Sara Kalvala);
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   649
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   650
* HOL/Auth: correctness proofs for authentication protocols;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   651
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   652
* HOL: new auto_tac combines rewriting and classical reasoning (many
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   653
examples on HOL/Auth);
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   654
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   655
* HOL: new command AddIffs for declaring theorems of the form P=Q to
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   656
the rewriter and classical reasoner simultaneously;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   657
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   658
* function uresult no longer returns theorems in "standard" format;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   659
regain previous version by: val uresult = standard o uresult;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   660
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   661
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   662
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   663
New in Isabelle94-6
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   664
-------------------
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   665
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   666
* oracles -- these establish an interface between Isabelle and trusted
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   667
external reasoners, which may deliver results as theorems;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   668
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   669
* proof objects (in particular record all uses of oracles);
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   670
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   671
* Simp_tac, Fast_tac, etc. that refer to implicit simpset / claset;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   672
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   673
* "constdefs" section in theory files;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   674
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   675
* "primrec" section (HOL) no longer requires names;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   676
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   677
* internal type "tactic" now simply "thm -> thm Sequence.seq";
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   678
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   679
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   680
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   681
New in Isabelle94-5
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   682
-------------------
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   683
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   684
* reduced space requirements;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   685
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   686
* automatic HTML generation from theories;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   687
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   688
* theory files no longer require "..." (quotes) around most types;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   689
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   690
* new examples, including two proofs of the Church-Rosser theorem;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   691
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   692
* non-curried (1994) version of HOL is no longer distributed;
1b160cd50130 *** empty log message ***
wenzelm
parents: 2553
diff changeset
   693
2553
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
   694
2557
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   695
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   696
New in Isabelle94-4
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   697
-------------------
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   698
2747
9fdc1461085f Tidied and updated
paulson
parents: 2732
diff changeset
   699
* greatly reduced space requirements;
2557
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   700
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   701
* theory files (.thy) no longer require \...\ escapes at line breaks;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   702
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   703
* searchable theorem database (see the section "Retrieving theorems" on 
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   704
page 8 of the Reference Manual);
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   705
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   706
* new examples, including Grabczewski's monumental case study of the
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   707
Axiom of Choice;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   708
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   709
* The previous version of HOL renamed to Old_HOL;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   710
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   711
* The new version of HOL (previously called CHOL) uses a curried syntax 
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   712
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
   713
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   714
* Mutually recursive inductive definitions finally work in HOL;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   715
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   716
* 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
   717
translates to the operator "split";
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   718
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   719
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   720
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   721
New in Isabelle94-3
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   722
-------------------
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   723
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   724
* new infix operator, addss, allowing the classical reasoner to 
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   725
perform simplification at each step of its search.  Example:
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   726
	fast_tac (cs addss ss)
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   727
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   728
* a new logic, CHOL, the same as HOL, but with a curried syntax 
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   729
for functions.  Application looks like f a b instead of f(a,b).  Also pairs 
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   730
look like (a,b) instead of <a,b>;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   731
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   732
* PLEASE NOTE: CHOL will eventually replace HOL!
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   733
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   734
* 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
   735
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
   736
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   737
* In ZF, integer numerals now denote two's-complement binary integers.
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   738
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
   739
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   740
* Many new examples: I/O automata, Church-Rosser theorem, equivalents 
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   741
of the Axiom of Choice;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   742
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   743
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   744
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   745
New in Isabelle94-2
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   746
-------------------
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   747
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   748
* Significantly faster resolution;  
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   749
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   750
* 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
   751
freely;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   752
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   753
* Database of theorems for FOL, HOL and ZF.  New
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   754
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
   755
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   756
* 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
   757
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
   758
(theory_of_thm);
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   759
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   760
* Bugs fixed in the inductive definition and datatype packages;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   761
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   762
* 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
   763
and HOL_dup_cs obsolete;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   764
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   765
* 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
   766
have been removed;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   767
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   768
* Simpler definition of function space in ZF;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   769
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   770
* new results about cardinal and ordinal arithmetic in ZF;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   771
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   772
* '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
   773
types;
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   774
dffebc6ab0a1 More news items, dating back to 1995
paulson
parents: 2556
diff changeset
   775
2553
ed941505cab7 Isabelle NEWS -- history of user-visible changes;
wenzelm
parents:
diff changeset
   776
$Id$