Fri, 19 Feb 2010 11:56:11 +0100 wenzelm tuned message;
Fri, 19 Feb 2010 11:49:44 +0100 wenzelm Lin_Arith.pre_tac: inherit proper simplifier context, and get rid of posthoc renaming of bound variables;
Fri, 19 Feb 2010 16:42:37 +0100 haftmann merged
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