Fri, 13 Dec 1996 10:20:55 +0100 paulson Streamlined some proofs
Fri, 13 Dec 1996 10:18:48 +0100 paulson Streamlined many proofs
Fri, 13 Dec 1996 10:17:35 +0100 paulson Addition of the Hash constructor
Tue, 10 Dec 1996 15:13:53 +0100 wenzelm fixed alternative quantifier symbol syntax;
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