Fri, 24 Feb 2012 17:21:24 +0100 huffman remove ill-formed lemmas word_0_wi_Pls and word_m1_wi_Min
Fri, 24 Feb 2012 16:59:20 +0100 huffman avoid using Int.succ_def in proofs
Fri, 24 Feb 2012 16:55:29 +0100 huffman avoid using Int.succ or Int.pred in proofs
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