Thu, 17 Nov 2011 18:31:00 +0100 huffman Groups.thy: generalize several lemmas from class ab_group_add to class group_add
Thu, 17 Nov 2011 15:07:46 +0100 huffman HOL-Word: removed more duplicate theorems
Thu, 17 Nov 2011 14:52:05 +0100 huffman HOL-Word: removed many duplicate theorems (see NEWS)
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