Tue, 05 Sep 2000 18:44:42 +0200 wenzelm recdef hints (attributes and modifiers);
Tue, 05 Sep 2000 18:43:54 +0200 wenzelm added 'iff' modifier;
Tue, 05 Sep 2000 18:43:22 +0200 wenzelm tuned;
Tue, 05 Sep 2000 18:43:05 +0200 wenzelm updated;
Tue, 05 Sep 2000 13:53:39 +0200 nipkow *** empty log message ***
Tue, 05 Sep 2000 13:12:00 +0200 paulson tidied, proving gcd_greatest_iff and using induct_tac
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