Mon, 21 Dec 2009 08:32:04 +0100 haftmann prefer prefix "iso" over potentially misleading "is"; tuned
Mon, 21 Dec 2009 08:32:03 +0100 haftmann moved lemmas o_eq_dest, o_eq_elim here
Sat, 19 Dec 2009 09:07:04 -0800 huffman add 'morphisms' option to domain_isomorphism command
Sat, 19 Dec 2009 06:07:33 -0800 huffman merged
Fri, 18 Dec 2009 20:13:23 -0800 huffman generalize lemma add_minus_cancel, add lemma minus_add, simplify some proofs
Fri, 18 Dec 2009 19:00:11 -0800 huffman rename equals_zero_I to minus_unique (keep old name too)
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