Fri, 01 Feb 2008 08:32:10 +0100 haftmann fixed record problem
Fri, 01 Feb 2008 02:38:41 +0100 huffman add lemmas prod_lessI and Pair_less_iff [simp]
Thu, 31 Jan 2008 22:00:31 +0100 huffman add lemma is_lub_lambda
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