Sat, 21 Apr 2012 11:04:21 +0200 | huffman | remove duplicate of lemma id_transfer | changeset | files |
Sat, 21 Apr 2012 11:02:01 +0200 | huffman | added covariant relator set_rel, with transfer rules for set operations | changeset | files |
Sat, 21 Apr 2012 10:59:52 +0200 | huffman | renamed contravariant relator set_rel to vset_rel, to make room for new covariant relator | changeset | files |