Tue, 27 May 1997 14:38:49 +0200 wenzelm added 1.09.28 note;
Tue, 27 May 1997 13:26:42 +0200 paulson New theorems suggested by Florian Kammueller
Tue, 27 May 1997 13:26:11 +0200 paulson Restoration of the two "bypassed" theorems Union_quotient and quotient_disj
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