Wed, 17 Jun 2015 22:29:12 +0200 wenzelm tuned proofs -- slightly faster;
Wed, 17 Jun 2015 22:12:08 +0200 wenzelm tuned proofs -- much faster;
Wed, 17 Jun 2015 20:05:21 +0200 wenzelm tuned proofs;
Wed, 17 Jun 2015 22:06:56 +0200 nipkow tuned
Wed, 17 Jun 2015 20:22:01 +0200 nipkow merged
Wed, 17 Jun 2015 20:21:40 +0200 nipkow added funs and lemmas
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