src/HOL/Isar_examples/MutilatedCheckerboard.thy
Wed, 13 Jun 2007 18:30:11 +0200 wenzelm tuned proofs: avoid implicit prems;
Wed, 07 Feb 2007 17:46:03 +0100 berghofe Adapted to changes in Finite_Set theory.
Wed, 23 Nov 2005 22:26:13 +0100 wenzelm tuned induction proofs;
Wed, 16 Nov 2005 17:50:35 +0100 wenzelm tuned;
Thu, 10 Nov 2005 21:14:05 +0100 wenzelm tuned proofs;
Fri, 17 Jun 2005 16:12:49 +0200 haftmann migrated theory headers to new format
Thu, 30 May 2002 10:12:52 +0200 nipkow Modifications due to enhanced linear arithmetic.
Tue, 30 Oct 2001 17:37:25 +0100 wenzelm tuned induct proofs;
Sat, 06 Oct 2001 00:02:46 +0200 wenzelm * sane numerals (stage 2): plain "num" syntax (removed "#");
Fri, 05 Oct 2001 21:52:39 +0200 wenzelm sane numerals (stage 1): added generic 1, removed 1' and 2 on nat,
Mon, 06 Nov 2000 22:56:07 +0100 wenzelm improved: 'induct' handle non-atomic goals;
Fri, 03 Nov 2000 21:33:53 +0100 wenzelm adapted "obtain" proofs;
Sun, 17 Sep 2000 22:19:02 +0200 wenzelm isar-strip-terminators;
Tue, 12 Sep 2000 22:13:23 +0200 wenzelm renamed atts: rulify to rule_format, elimify to elim_format;
Thu, 07 Sep 2000 21:10:11 +0200 wenzelm updated attribute names;
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