| Thu, 17 May 2007 19:12:47 +0200 | huffman | generalize class restrictions on some lemmas | changeset | files |
| Thu, 17 May 2007 18:32:17 +0200 | huffman | added classes ring_no_zero_divisors and dom (non-commutative version of idom); | changeset | files |
| Thu, 17 May 2007 13:37:24 +0200 | paulson | Added three items to the signature | changeset | files |