src/HOL/Library/Commutative_Ring.thy
Tue, 19 Sep 2006 23:15:28 +0200 wenzelm tuned proofs;
Sat, 27 May 2006 17:42:02 +0200 wenzelm tuned;
Thu, 19 Jan 2006 21:22:08 +0100 wenzelm setup: theory -> theory;
Tue, 20 Sep 2005 14:10:29 +0200 wenzelm added Commutative_Ring (from Main HOL);
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