Wed, 10 Aug 2011 17:02:03 -0700 huffman follow standard naming scheme for sgn_vec_def
Wed, 10 Aug 2011 16:35:50 -0700 huffman remove several redundant and unused theorems about derivatives
Wed, 10 Aug 2011 15:56:48 -0700 huffman remove redundant lemma
Wed, 10 Aug 2011 14:25:56 -0700 huffman simplify proof of lemma bounded_component
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