Mon, 23 Oct 2006 17:46:11 +0200 krauss Fixed bug in the handling of congruence rules
Mon, 23 Oct 2006 16:56:35 +0200 haftmann (added entry)
Mon, 23 Oct 2006 16:49:21 +0200 haftmann switched merge_alists'' to AList.merge'' whenever appropriate
Mon, 23 Oct 2006 11:18:50 +0200 paulson new single-step proofs
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