Fri, 28 Sep 2012 15:05:16 +0200 wenzelm tuned proofs;
Fri, 28 Sep 2012 15:23:32 +0200 blanchet simplified simpset
Fri, 28 Sep 2012 15:14:11 +0200 blanchet fixed simplification of prod and sum relators to avoid issues with e.g. codata ('a, 'b) k = K "'a + 'b"
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