Fri, 17 Oct 1997 10:58:44 +0200 paulson Better simplification eliminates a command from proof of psubset_card
Fri, 17 Oct 1997 10:57:48 +0200 paulson New simprules imp_disj1,2 and some comments
Fri, 17 Oct 1997 09:04:02 +0200 nipkow Added image_eqI to simpset.
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