src/HOL/Library/Perm.thy
Fri, 22 Jul 2016 11:00:43 +0200 wenzelm tuned proofs -- avoid unstructured calculation;
Fri, 22 Jul 2016 08:02:37 +0200 wenzelm tuned proofs -- avoid improper use of "this";
Mon, 11 Jul 2016 10:43:27 +0200 wenzelm tuned;
Mon, 04 Jul 2016 19:46:20 +0200 haftmann basic facts about almost everywhere fix bijections
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