Mon, 14 Oct 2002 11:32:00 +0200 paulson tidying and reorganization
Mon, 14 Oct 2002 10:44:32 +0200 nipkow Ported find_intro/elim to Isar.
Fri, 11 Oct 2002 12:47:52 +0200 berghofe norm_typ -> Envir.norm_type
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