Thu, 17 Jun 1999 10:39:30 +0200 | paulson | addition of drop_... operators with new results and simplification of old ones | changeset | files |
Thu, 17 Jun 1999 10:36:03 +0200 | paulson | renamed UNION_... to UN_..., INTER_... to INT_... (to fit the convention) | changeset | files |
Thu, 17 Jun 1999 10:35:01 +0200 | paulson | many new guarantees laws | changeset | files |