src/HOL/Isar_examples/Mutilated_Checkerboard.thy
Sat, 17 Oct 2009 14:43:18 +0200 wenzelm eliminated hard tabulators, guessing at each author's individual tab-width;
Mon, 31 Aug 2009 14:09:42 +0200 nipkow tuned the simp rules for Int involving insert and intervals.
Mon, 22 Jun 2009 23:48:24 +0200 wenzelm observe standard theory naming conventions;
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