Mon, 26 Nov 2001 23:24:27 +0100 wenzelm added Pure/Isar/rule_context.ML;
Mon, 26 Nov 2001 23:23:33 +0100 wenzelm gcd_dvd1 and gcd_dvd2 proven simultaneously;
Mon, 26 Nov 2001 18:34:17 +0100 wenzelm moved lemmas to theory Hilbert_Choice;
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