Sun, 09 May 2010 09:39:01 -0700 huffman merged
Sat, 08 May 2010 17:06:58 -0700 huffman add lemmas one_less_inverse and one_le_inverse
Sun, 09 May 2010 15:28:44 +0200 krauss do not redeclare [simp] rules, to avoid "duplicate rewrite rule" warnings
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