Sat, 24 Sep 2005 16:43:41 +0200 obua HOL4-Import: map ONTO to Fun.surj
Sat, 24 Sep 2005 13:54:35 +0200 webertj cnf_struct renamed to cnf
Sat, 24 Sep 2005 13:26:40 +0200 obua remove debug clutter
Sat, 24 Sep 2005 13:11:05 +0200 obua preliminary fix of HOL build problem
Sat, 24 Sep 2005 10:47:22 +0200 obua bug fix
Sat, 24 Sep 2005 07:57:50 +0200 webertj replay_proof optimized: now performs backwards proof search
Sat, 24 Sep 2005 07:21:46 +0200 webertj code reformatted and restructured, many minor modifications
Sat, 24 Sep 2005 07:10:57 +0200 webertj bugfix in "zchaff_with_proofs"
Sat, 24 Sep 2005 02:53:08 +0200 webertj parse_std_result_file renamed to read_std_result_file
Fri, 23 Sep 2005 23:28:59 +0200 webertj new sat tactic
Fri, 23 Sep 2005 22:58:50 +0200 webertj new sat tactic imports resolution proofs from zChaff
Fri, 23 Sep 2005 22:49:25 +0200 obua fix
Fri, 23 Sep 2005 22:31:22 +0200 wenzelm simprocs: pattern now "x" (the proc is supposed to discriminate faster than Pattern.match);
Fri, 23 Sep 2005 22:21:55 +0200 wenzelm tuned msg;
Fri, 23 Sep 2005 22:21:54 +0200 wenzelm added mk_solver';
Fri, 23 Sep 2005 22:21:53 +0200 wenzelm Simplifier.inherit_bounds;
Fri, 23 Sep 2005 22:21:52 +0200 wenzelm adm_tac/cont_tacRs: proper simpset;
Fri, 23 Sep 2005 22:21:51 +0200 wenzelm Provers/Arith/fast_lin_arith.ML: Simplifier.inherit_bounds;
Fri, 23 Sep 2005 22:21:50 +0200 wenzelm tuned order of targets;
Fri, 23 Sep 2005 22:21:49 +0200 wenzelm Provers/cancel_sums.ML: Simplifier.inherit_bounds;
Fri, 23 Sep 2005 21:02:13 +0200 webertj some typos in comments fixed
Fri, 23 Sep 2005 20:13:54 +0200 obua 1) fixed bug in type_introduction: first stage uses different namespace than second stage
Fri, 23 Sep 2005 18:47:47 +0200 wenzelm removed doc/index.html from distribution (now produced by website);
Fri, 23 Sep 2005 17:06:23 +0200 haftmann mkdir -p for symlinks
Fri, 23 Sep 2005 16:05:42 +0200 nipkow rules -> iprover
Fri, 23 Sep 2005 16:05:10 +0200 webertj spaces inserted in header
Fri, 23 Sep 2005 16:01:45 +0200 webertj header (title/ID) added
Fri, 23 Sep 2005 15:45:12 +0200 webertj typo fixed: rufute -> refute
Fri, 23 Sep 2005 15:38:22 +0200 schirmer bugfix in record_tr'
Fri, 23 Sep 2005 15:32:42 +0200 wenzelm method 'rules' renamed to 'iprover', which does *not* retrieve theorems from the Internet;
Fri, 23 Sep 2005 14:55:28 +0200 wenzelm Id;
Fri, 23 Sep 2005 13:20:47 +0200 wenzelm tuned;
Fri, 23 Sep 2005 10:26:07 +0200 paulson changed defaults
Fri, 23 Sep 2005 10:25:55 +0200 paulson ATP linkup
Fri, 23 Sep 2005 10:01:14 +0200 obua replay type_introduction fix
Fri, 23 Sep 2005 09:00:19 +0200 haftmann temporarily re-introduced overwrite_warn
Fri, 23 Sep 2005 00:52:13 +0200 obua add debug messages
Fri, 23 Sep 2005 00:11:10 +0200 nipkow renamed rules to iprover
Fri, 23 Sep 2005 00:10:58 +0200 nipkow *** empty log message ***
Thu, 22 Sep 2005 23:56:15 +0200 nipkow renamed rules to iprover
Thu, 22 Sep 2005 23:55:42 +0200 nipkow fix because of list lemmas
Thu, 22 Sep 2005 23:43:55 +0200 nipkow renamed "rules" to "iprover"
Thu, 22 Sep 2005 19:06:34 +0200 huffman added theorem adm_ball
Thu, 22 Sep 2005 19:06:05 +0200 huffman cleaned up
Thu, 22 Sep 2005 18:59:41 +0200 huffman HOLCF theorem naming conventions
Thu, 22 Sep 2005 14:09:48 +0200 paulson removal of "sleep" to stop looping in Poly/ML, and replacement of funny codes by tracing statements
Thu, 22 Sep 2005 14:02:14 +0200 nipkow Fix because of new lemma in List
Thu, 22 Sep 2005 13:52:55 +0200 webertj solver "auto" does not reverse the list of solvers anymore
Thu, 22 Sep 2005 07:56:16 +0200 haftmann added fold_map_graph
Thu, 22 Sep 2005 07:56:04 +0200 haftmann added fold_map_table
Thu, 22 Sep 2005 00:30:31 +0200 isatest only show trunk in Changelog (kleing)
Wed, 21 Sep 2005 22:01:09 +0200 webertj zchaff_with_proofs does not delete zChaff\s resolve_trace file anymore
Wed, 21 Sep 2005 21:01:27 +0200 wenzelm echo HOL_USEDIR_OPTIONS;
Wed, 21 Sep 2005 21:00:57 +0200 wenzelm tuned;
Wed, 21 Sep 2005 20:26:45 +0200 wenzelm PROOFGENERAL_OPTIONS: smart fall-back on plain emacs (back again);
Wed, 21 Sep 2005 20:16:35 +0200 wenzelm updated for Isabelle2005;
Wed, 21 Sep 2005 20:16:34 +0200 wenzelm tuned;
Wed, 21 Sep 2005 19:16:16 +0200 wenzelm updated for Isabelle2005;
Wed, 21 Sep 2005 19:08:33 +0200 wenzelm obsolete;
Wed, 21 Sep 2005 18:35:31 +0200 paulson improved proof parsing
Wed, 21 Sep 2005 18:35:19 +0200 paulson trying to limit the looping
Wed, 21 Sep 2005 18:06:04 +0200 wenzelm updated for Isabelle2005;
Wed, 21 Sep 2005 18:04:49 +0200 wenzelm new header syntax;
Wed, 21 Sep 2005 17:25:32 +0200 haftmann introduces update_warn instead of overwrite_warn
Wed, 21 Sep 2005 17:21:35 +0200 haftmann added AList.make, eq_fst, apr ...
Wed, 21 Sep 2005 16:37:37 +0200 haftmann unify dist and main
Wed, 21 Sep 2005 14:46:10 +0200 wenzelm tuned;
Wed, 21 Sep 2005 14:45:55 +0200 wenzelm fixed cvs export;
Wed, 21 Sep 2005 14:23:57 +0200 wenzelm tuned;
Wed, 21 Sep 2005 14:05:47 +0200 wenzelm obsolete;
Wed, 21 Sep 2005 14:03:30 +0200 wenzelm tuned;
Wed, 21 Sep 2005 14:02:57 +0200 wenzelm the_default, the_list;
Wed, 21 Sep 2005 14:00:31 +0200 wenzelm updated;
Wed, 21 Sep 2005 14:00:28 +0200 wenzelm quote "value";
Wed, 21 Sep 2005 13:28:44 +0200 wenzelm removed "--" argument;
Wed, 21 Sep 2005 13:16:40 +0200 wenzelm isatool fixheaders;
Wed, 21 Sep 2005 12:03:41 +0200 berghofe Added new "value" command.
Wed, 21 Sep 2005 12:02:56 +0200 berghofe Simplified code generator for numerals.
Wed, 21 Sep 2005 12:02:19 +0200 berghofe Declared nat_number_of as code lemma.
Wed, 21 Sep 2005 12:01:31 +0200 berghofe - Added eval_term function and value command
Wed, 21 Sep 2005 11:50:52 +0200 wenzelm tunes;
Wed, 21 Sep 2005 11:50:38 +0200 wenzelm updated for Isabelle2005;
Wed, 21 Sep 2005 11:50:20 +0200 wenzelm HOL-Complex-Matrix: fixed deps;
Wed, 21 Sep 2005 11:49:31 +0200 wenzelm tuned;
Wed, 21 Sep 2005 11:19:16 +0200 wenzelm updated for Isabelle2005;
Wed, 21 Sep 2005 10:40:28 +0200 wenzelm tuned;
Wed, 21 Sep 2005 10:39:38 +0200 haftmann (name mess cleanup)
Wed, 21 Sep 2005 10:33:59 +0200 haftmann introduced AList module
Wed, 21 Sep 2005 10:32:24 +0200 haftmann removed assoc, overwrite
Wed, 21 Sep 2005 10:32:06 +0200 haftmann added update_warn
Wed, 21 Sep 2005 00:07:32 +0200 wenzelm tuned;
Tue, 20 Sep 2005 23:36:57 +0200 wenzelm fixed proof script of lemma merges_same_conv (Why did it stop working?);
Tue, 20 Sep 2005 22:07:36 +0200 wenzelm updated;
Tue, 20 Sep 2005 22:02:06 +0200 wenzelm tuned;
Tue, 20 Sep 2005 21:51:06 +0200 wenzelm HOL/ex/Chinese.thy;
Tue, 20 Sep 2005 21:48:47 +0200 wenzelm tuned;
Tue, 20 Sep 2005 21:48:37 +0200 wenzelm more contributions;
Tue, 20 Sep 2005 21:39:00 +0200 wenzelm tuned headers;
Tue, 20 Sep 2005 21:34:20 +0200 wenzelm tuned header;
Tue, 20 Sep 2005 21:09:41 +0200 wenzelm use "ML-Systems/smlnj-basis-compat.ML" *after* Interrupt;
Tue, 20 Sep 2005 20:16:55 +0200 wenzelm fixed proof script of lemma Cond_sound (Why did it stop working anyway?);
Tue, 20 Sep 2005 19:38:35 +0200 webertj bugfix in "zchaff_with_proofs"
Tue, 20 Sep 2005 18:47:42 +0200 paulson fixed recursive-looking declaration
Tue, 20 Sep 2005 18:43:39 +0200 paulson tidying, and support for axclass/classrel clauses
Tue, 20 Sep 2005 18:42:56 +0200 paulson fixed syntax for sml/nj
Tue, 20 Sep 2005 17:01:43 +0200 webertj undone the previous change: show_hyps not supported anymore
Tue, 20 Sep 2005 16:19:51 +0200 webertj pointers to src/HOL/Tools/sat_solver.ML added in comments
Tue, 20 Sep 2005 16:17:34 +0200 haftmann introduced AList module in favor of assoc etc.
Tue, 20 Sep 2005 15:12:40 +0200 webertj new menu item show-sort-hypotheses to toggle show_hyps
Tue, 20 Sep 2005 14:20:58 +0200 wenzelm HOL/ex/Chinese.thy;
Tue, 20 Sep 2005 14:17:31 +0200 wenzelm HOL-ex: Library/Commutative_Ring.thy;
Tue, 20 Sep 2005 14:13:20 +0200 wenzelm moved Tools/comm_ring.ML to Library;
Tue, 20 Sep 2005 14:10:29 +0200 wenzelm added Commutative_Ring (from Main HOL);
Tue, 20 Sep 2005 14:06:00 +0200 wenzelm Simplifier.inherit_bounds;
Tue, 20 Sep 2005 14:04:34 +0200 wenzelm TextIO.inputLine: handle IO.Io, assuming it stems from a signal;
Tue, 20 Sep 2005 14:03:42 +0200 wenzelm get_interrupt: special handling of IO.io now in ML-Systems/smlnj-basis-compat.ML;
Tue, 20 Sep 2005 14:03:41 +0200 wenzelm removed obsolete thms_containing;
Tue, 20 Sep 2005 14:03:40 +0200 wenzelm tuned;
Tue, 20 Sep 2005 14:03:39 +0200 wenzelm tuned simprocs;
Tue, 20 Sep 2005 14:03:38 +0200 wenzelm removed Commutative_Ring hacks;
Tue, 20 Sep 2005 14:03:37 +0200 wenzelm tuned theory dependencies;
Tue, 20 Sep 2005 13:58:58 +0200 wenzelm removed Commutative_Ring.thy, added HOL/ex/Chinese.thy;
Tue, 20 Sep 2005 13:57:08 +0200 wenzelm tuned;
Tue, 20 Sep 2005 13:56:34 +0200 wenzelm Chinese Unicode example;
Tue, 20 Sep 2005 13:56:01 +0200 wenzelm tuned proofs;
Tue, 20 Sep 2005 13:33:27 +0200 chaieb The simpset of the actual theory is take, in order to handle rings defined after the method
Tue, 20 Sep 2005 13:17:55 +0200 paulson further tidying; killing of old Watcher loops
Tue, 20 Sep 2005 13:17:55 +0200 nipkow added a number of lemmas
Tue, 20 Sep 2005 13:17:32 +0200 paulson uniform handling of interrupts
Tue, 20 Sep 2005 10:36:33 +0200 chaieb algebra method added.
Tue, 20 Sep 2005 08:24:18 +0200 haftmann improved eq_fst and eq_snd, removed some deprecated stuff
Tue, 20 Sep 2005 08:23:59 +0200 haftmann added make and find
Tue, 20 Sep 2005 08:21:49 +0200 haftmann slight adaptions to library changes
Tue, 20 Sep 2005 08:20:22 +0200 haftmann infix operator precedence
Tue, 20 Sep 2005 00:16:29 +0200 webertj using curried Inttab.update_new function now
Mon, 19 Sep 2005 23:45:59 +0200 webertj SAT solver interface modified to support proofs of unsatisfiability
Mon, 19 Sep 2005 23:23:51 +0200 wenzelm shrink: compress terms and types;
Mon, 19 Sep 2005 23:22:51 +0200 wenzelm added String.isSuffix;
Mon, 19 Sep 2005 22:35:39 +0200 obua maybe the last bug fix (sigh)?
Mon, 19 Sep 2005 19:49:09 +0200 obua Removed superfluous HOL/Matrix/cplex/ROOT.ML.
Mon, 19 Sep 2005 18:30:22 +0200 paulson further simplification of the Isabelle-ATP linkup
Mon, 19 Sep 2005 16:42:11 +0200 haftmann added make function
Mon, 19 Sep 2005 16:39:27 +0200 haftmann removed some deprecated assocation list functions
Mon, 19 Sep 2005 16:38:35 +0200 haftmann introduced AList module
Mon, 19 Sep 2005 15:12:13 +0200 paulson simplification of the Isabelle-ATP code; hooks for batch generation of problems
Mon, 19 Sep 2005 14:20:45 +0200 kleing update usage message
Mon, 19 Sep 2005 12:05:08 +0200 wenzelm obsolete;
Sun, 18 Sep 2005 15:20:08 +0200 wenzelm converted to Isar theory format;
Sun, 18 Sep 2005 14:25:48 +0200 wenzelm converted to Isar theory format;
Sat, 17 Sep 2005 20:49:14 +0200 wenzelm converted to Isar theory format;
Sat, 17 Sep 2005 20:16:35 +0200 wenzelm tuned;
Sat, 17 Sep 2005 20:14:30 +0200 wenzelm converted to Isar theory format;
Sat, 17 Sep 2005 19:17:35 +0200 wenzelm moved quick_and_dirty to Pure/ROOT.ML;
Sat, 17 Sep 2005 19:17:34 +0200 wenzelm pretty_thm_aux: ora masked by quick_and_dirty;
Sat, 17 Sep 2005 19:17:33 +0200 wenzelm added quick_and_dirty (from Isar/skip_proofs.ML);
Sat, 17 Sep 2005 19:12:58 +0200 wenzelm manually generated from Isabelle/HOLCF/IOA/Complex/Import;
Sat, 17 Sep 2005 18:25:11 +0200 wenzelm tuned document;
Sat, 17 Sep 2005 18:24:57 +0200 wenzelm tuned;
Sat, 17 Sep 2005 18:11:30 +0200 wenzelm added with_charset: string -> ('a -> 'b) -> 'a -> 'b;
Sat, 17 Sep 2005 18:11:29 +0200 wenzelm tuned comments;
Sat, 17 Sep 2005 18:11:28 +0200 wenzelm pretty_thm_aux: aconv hyps;
Sat, 17 Sep 2005 18:11:27 +0200 wenzelm removed obsolete BasisLibrary;
Sat, 17 Sep 2005 18:11:26 +0200 wenzelm Hebrew: HTML.with_charset;
Sat, 17 Sep 2005 18:11:25 +0200 wenzelm removed obsolete BasisLibrary;
Sat, 17 Sep 2005 18:11:24 +0200 wenzelm added quickcheck_params (from Main.thy);
Sat, 17 Sep 2005 18:11:23 +0200 wenzelm removed spurious PolyML.exception_trace;
Sat, 17 Sep 2005 18:11:22 +0200 wenzelm moved setup ResAxioms.clause_setup to Main.thy (it refers to all previous theories);
Sat, 17 Sep 2005 18:11:21 +0200 wenzelm minor cleanup, moved stuff in its proper place;
Sat, 17 Sep 2005 18:11:20 +0200 wenzelm generate: added HOL-Complex-Generate-HOLLight;
Sat, 17 Sep 2005 18:11:19 +0200 wenzelm added code generator setup (from Main.thy);
Sat, 17 Sep 2005 18:11:18 +0200 wenzelm lemmas [code] = imp_conv_disj (from Main.thy) -- Why does it need Datatype?
Sat, 17 Sep 2005 18:11:17 +0200 wenzelm HTML.with_charset;
Sat, 17 Sep 2005 17:35:26 +0200 wenzelm converted to Isar theory format;
Sat, 17 Sep 2005 14:02:31 +0200 wenzelm tuned document;
Sat, 17 Sep 2005 12:51:03 +0200 wenzelm obsolete;
Sat, 17 Sep 2005 12:50:57 +0200 wenzelm plain test session, includes example;
Sat, 17 Sep 2005 12:18:08 +0200 wenzelm theory_to_proof: check theory of initial proof state, which must not be changed;
Sat, 17 Sep 2005 12:18:07 +0200 wenzelm added auto_fix (from proof.ML);
Sat, 17 Sep 2005 12:18:06 +0200 wenzelm export put_facts;
Sat, 17 Sep 2005 12:18:05 +0200 wenzelm interpretation: use goal commands without target -- no storing of results;
Sat, 17 Sep 2005 12:18:04 +0200 wenzelm theorem(_i): empty target;
Sat, 17 Sep 2005 12:18:03 +0200 wenzelm pretty_thm_aux: observe asms context;
Sat, 17 Sep 2005 12:18:02 +0200 wenzelm tuned;
Sat, 17 Sep 2005 12:18:00 +0200 wenzelm Cube: converted to Isar, use locales;
Sat, 17 Sep 2005 11:49:29 +0200 obua 1) mapped .. and == constants
Sat, 17 Sep 2005 01:50:01 +0200 huffman use interpretation command
Fri, 16 Sep 2005 23:55:23 +0200 huffman add HOLCF entries for pcpodef, cont_proc, fixrec;
Fri, 16 Sep 2005 23:01:29 +0200 wenzelm converted to Isar theory format;
Fri, 16 Sep 2005 21:02:15 +0200 obua fixed HOL-light/Isabelle syntax incompatability via more protect_xxx functions
Fri, 16 Sep 2005 20:30:44 +0200 huffman add header
Fri, 16 Sep 2005 16:07:22 +0200 ballarin tuned
Fri, 16 Sep 2005 14:46:31 +0200 ballarin interpretation uses primitive goal interface
Fri, 16 Sep 2005 14:44:52 +0200 ballarin tuned
Fri, 16 Sep 2005 11:39:09 +0200 paulson PARTIAL conversion to Vampire8
Fri, 16 Sep 2005 11:38:49 +0200 paulson catching exception Io
Fri, 16 Sep 2005 02:20:50 +0200 huffman rearranged
Fri, 16 Sep 2005 01:42:57 +0200 huffman use mem operator
Fri, 16 Sep 2005 01:34:53 +0200 huffman fix names in hypreal_arith.ML
Thu, 15 Sep 2005 23:53:33 +0200 huffman merge Hyperreal/Transfer.thy and Hyperreal/StarType.thy into Hyperreal/StarDef.thy
Thu, 15 Sep 2005 23:46:22 +0200 huffman merged Transfer.thy and StarType.thy into StarDef.thy; renamed Ifun2_of to starfun2; cleaned up
Thu, 15 Sep 2005 23:16:04 +0200 huffman add header
Thu, 15 Sep 2005 22:16:23 +0200 chaieb The SMLNJ Problem fixed...
Thu, 15 Sep 2005 20:38:47 +0200 chaieb getting it work for SMLNJ
Thu, 15 Sep 2005 20:27:48 +0200 wenzelm * Improved efficiency of the Simplifier etc.;
Thu, 15 Sep 2005 20:25:04 +0200 wenzelm incorporated into NEWS;
Thu, 15 Sep 2005 20:24:53 +0200 wenzelm incorporated HOL/Hyperreal/CHANGES;
Thu, 15 Sep 2005 17:46:00 +0200 paulson massive tidy-up and simplification
Thu, 15 Sep 2005 17:45:17 +0200 paulson moving Commutative_Ring to the correct theory
Thu, 15 Sep 2005 17:44:53 +0200 paulson comment
Thu, 15 Sep 2005 17:18:57 +0200 wenzelm poly -doDisplay;
Thu, 15 Sep 2005 17:17:06 +0200 wenzelm TableFun/Symtab: curried lookup and update;
Thu, 15 Sep 2005 17:17:05 +0200 wenzelm TableFun/Symtab: curried lookup and update;
Thu, 15 Sep 2005 17:17:04 +0200 wenzelm fixed type;
Thu, 15 Sep 2005 17:17:03 +0200 wenzelm fixed ML;
Thu, 15 Sep 2005 17:17:02 +0200 wenzelm The Hebrew Alef-Bet -- Unicode example;
Thu, 15 Sep 2005 17:17:01 +0200 wenzelm added Hebrew.thy;
Thu, 15 Sep 2005 17:16:56 +0200 wenzelm TableFun/Symtab: curried lookup and update;
Thu, 15 Sep 2005 17:16:55 +0200 wenzelm fixed document;
Thu, 15 Sep 2005 17:16:54 +0200 wenzelm added HOL/ex/Hebrew.thy;
Thu, 15 Sep 2005 17:16:53 +0200 wenzelm obsolete;
Thu, 15 Sep 2005 17:16:53 +0200 wenzelm command 'thms_containing' has been discontinued in favour of 'find_theorems';
Thu, 15 Sep 2005 16:15:22 +0200 aspinall Revert previous attribute name change, problem can be avoided in JAXB.
Thu, 15 Sep 2005 13:36:10 +0200 wenzelm forget_proof: Sign.local_path o Sign.restore_naming ProtoPure.thy -- workaround to omission in locale goals;
Thu, 15 Sep 2005 13:35:21 +0200 wenzelm extend: NameSpace.default_naming;
Thu, 15 Sep 2005 11:15:52 +0200 paulson the experimental tagging system, and the usual tidying
Thu, 15 Sep 2005 10:33:35 +0200 aspinall Change PGIP attribute name class->messageclass to avoid Java keyword clash.
Thu, 15 Sep 2005 10:00:01 +0200 haftmann AList, the_*
Thu, 15 Sep 2005 08:16:22 +0200 haftmann fixed type annotation
Thu, 15 Sep 2005 07:35:38 +0200 haftmann added gen_list to Pretty module
Wed, 14 Sep 2005 23:55:49 +0200 wenzelm @{term [source] ...} in subsections probably more robust;
Wed, 14 Sep 2005 23:31:09 +0200 wenzelm tuned;
Wed, 14 Sep 2005 23:15:00 +0200 wenzelm hide: added option '(open)';
Wed, 14 Sep 2005 23:14:59 +0200 wenzelm imports Commutative_Ring instead of Main, since the latter hides our names;
Wed, 14 Sep 2005 23:14:58 +0200 wenzelm hide the rather generic names used in theory Commutative_Ring;
Wed, 14 Sep 2005 23:14:57 +0200 wenzelm renamed Guard/NS_Public, Guard/OtwayRees, Guard/Yahalom.thy to avoid clash with plain Auth versions;
Wed, 14 Sep 2005 23:06:02 +0200 schirmer ... prem19
Wed, 14 Sep 2005 23:04:59 +0200 schirmer added prem10 - prem19
Wed, 14 Sep 2005 23:03:52 +0200 schirmer removed syntax fun_map_comp;
Wed, 14 Sep 2005 23:00:03 +0200 chaieb Unfortunately patched to use IntInf.int instead of just int (SML compatibility)
Wed, 14 Sep 2005 22:18:55 +0200 wenzelm Method comm_ring for proving equalities in commutative rings.
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