Thu, 09 Aug 2001 22:07:39 +0200 wenzelm tuned;
Thu, 09 Aug 2001 20:48:57 +0200 oheimb corrected initialization of locals, streamlined Impl
Thu, 09 Aug 2001 19:33:22 +0200 oheimb corrected semantics of [iff] concerning rules with premises
Thu, 09 Aug 2001 18:51:41 +0200 oheimb replaced 1 by 1'
Thu, 09 Aug 2001 18:12:15 +0200 paulson revisions and indexing
Thu, 09 Aug 2001 10:17:45 +0200 oheimb added pair_imageI (also as intro rule)
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