Sun, 04 Sep 2011 10:29:38 -0700 huffman replace lemma expi_imaginary with reoriented lemma cis_conv_exp
Sun, 04 Sep 2011 10:05:52 -0700 huffman remove redundant lemmas expi_add and expi_zero
Sun, 04 Sep 2011 09:49:45 -0700 huffman remove redundant lemmas about LIMSEQ
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