Wed, 11 Sep 2013 20:34:45 +0200 wenzelm tuned proofs;
Wed, 11 Sep 2013 20:16:28 +0200 wenzelm more explicit indication of 'done' as proof script element;
Thu, 12 Sep 2013 17:36:06 +0200 blanchet made tactic handle gracefully the case: codatatype ('a, 's) scheduler2 = Combine2 "'s => 'a" "'s => ('a, 's) scheduler2"
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