Sat, 06 Dec 2008 20:25:31 -0800 | huffman | fix proofs | changeset | files |
Sat, 06 Dec 2008 19:39:53 -0800 | huffman | change lemmas to avoid using neg | changeset | files |
Fri, 05 Dec 2008 17:35:22 -0800 | huffman | simplify less_nat_number_of | changeset | files |