Fri, 14 Feb 1997 12:19:42 +0100 nipkow Made troublesome simplifier warning dependent on trace_simp.
Fri, 14 Feb 1997 11:40:53 +0100 nipkow Modified and shortened adm_disj lemmas.
Fri, 14 Feb 1997 10:57:17 +0100 paulson Deleted a useless definition
Fri, 14 Feb 1997 10:41:02 +0100 paulson Added optimization: do nothing for empty list
Fri, 14 Feb 1997 10:40:23 +0100 paulson A bit more pattern-matching in eta_contract
Fri, 14 Feb 1997 10:38:48 +0100 paulson Tidying and a corrected comment
Fri, 14 Feb 1997 10:36:33 +0100 paulson Added a new challenge problem
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