Sat, 19 Dec 2009 06:07:33 -0800 merged
huffman [Sat, 19 Dec 2009 06:07:33 -0800] rev 34148
merged
Fri, 18 Dec 2009 20:13:23 -0800 generalize lemma add_minus_cancel, add lemma minus_add, simplify some proofs
huffman [Fri, 18 Dec 2009 20:13:23 -0800] rev 34147
generalize lemma add_minus_cancel, add lemma minus_add, simplify some proofs
Fri, 18 Dec 2009 19:00:11 -0800 rename equals_zero_I to minus_unique (keep old name too)
huffman [Fri, 18 Dec 2009 19:00:11 -0800] rev 34146
rename equals_zero_I to minus_unique (keep old name too)
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