Fri, 31 May 1996 19:47:23 +0200 oheimb adapted some proofs for new simplifier
Fri, 31 May 1996 19:34:40 +0200 oheimb renamed le_0 to le_0_eq, to avoid confusion with le0,
Fri, 31 May 1996 19:12:00 +0200 oheimb moved mem_simps and the corresponding update of !simpset from Fun.ML to Set.ML,
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