Sat, 03 Sep 2011 09:26:11 -0700 huffman remove duplicate lemma finite_choice in favor of finite_set_choice
Sat, 03 Sep 2011 09:12:19 -0700 huffman simplify proof
Sat, 03 Sep 2011 08:01:49 -0700 huffman shorten some proofs
Fri, 02 Sep 2011 20:58:31 -0700 huffman remove redundant simp rules ceiling_floor and floor_ceiling
Sat, 03 Sep 2011 22:05:25 +0200 wenzelm misc tuning and simplification of proofs;
Sat, 03 Sep 2011 21:15:35 +0200 wenzelm Document.removed_versions on Scala side;
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