Fri, 14 May 2004 16:52:53 +0200 paulson removed a premise of card_inj_on_le
Fri, 14 May 2004 16:50:33 +0200 paulson removal of locale coset
Fri, 14 May 2004 16:50:13 +0200 paulson deleted redundant proof lines
Fri, 14 May 2004 16:49:42 +0200 paulson new lemmas
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