Fri, 05 Dec 2008 15:52:12 +0000 paulson Updated comments.
Thu, 29 Jan 2009 09:35:51 +0000 chaieb dded theorems setsum_reindex_nonzero, setsum_mono_zero_left, setsum_mono_zero_right, setsum_mono_zero_cong_left, setsum_mono_zero_cong_right, setsum_delta, strong_setprod_reindex_cong, setprod_delta
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