Wed, 21 Apr 2010 12:38:20 +0200 Christian Urban merged
Wed, 21 Apr 2010 12:37:44 +0200 Christian Urban incomplete tests
Wed, 21 Apr 2010 12:37:19 +0200 Christian Urban added an improved version of the induction principle for permutations
Wed, 21 Apr 2010 10:34:10 +0200 Cezary Kaliszyk Working lifting of concat with inline proofs of second level preservation.
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