Tue, 27 Mar 2012 09:54:39 +0200 huffman rename lemmas {div,mod}_eq -> {div,mod}_nat_unique, for consistency with minus_unique, inverse_unique, etc.
Tue, 27 Mar 2012 09:44:56 +0200 huffman simplify some proofs
Mon, 26 Mar 2012 21:03:30 +0200 wenzelm merged
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