Thu, 24 Jul 2014 13:01:49 +0200 kuncar prevent beta-contraction in proving extra assumptions for abs_eq
Thu, 24 Jul 2014 11:54:15 +0200 wenzelm more robust notation BNF_Def.convol, which is private to main HOL, but may cause syntax ambiguities nonetheless (e.g. List.thy);
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