src/HOL/Isar_Examples/Mutilated_Checkerboard.thy
2011-12-28 wenzelm 2011-12-28 reverted some changes for set->predicate transition, according to "hg log -u berghofe -r Isabelle2007:Isabelle2008"; tuned proofs;
2010-12-02 wenzelm 2010-12-02 more antiquotations; removed some slightly outdated text;
2010-07-01 wenzelm 2010-07-01 misc tuning and modernization;
2010-03-01 haftmann 2010-03-01 replaced a couple of constsdefs by definitions (also some old primrecs by modern ones)
2009-10-20 wenzelm 2009-10-20 modernized session Isar_Examples;