Fri, 26 Aug 2011 21:11:23 +0200 haftmann separating predicates and sets syntactically
Fri, 26 Aug 2011 18:24:22 +0200 haftmann merged
Fri, 26 Aug 2011 18:23:33 +0200 haftmann avoid intermixing set and predicates; dropped lemmas mem_rsp and mem_prs (now in Quotient_Set.thy)
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