Fri, 10 Nov 2000 19:06:30 +0100 wenzelm improved cong_definition theorems;
Fri, 10 Nov 2000 19:05:28 +0100 wenzelm simplified induction;
Fri, 10 Nov 2000 19:04:31 +0100 wenzelm added axclass power (from HOL.thy);
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