| Wed, 01 Jul 2020 17:32:11 +0000 | haftmann | moved to Word_Lib | changeset | files |
| Wed, 01 Jul 2020 17:32:10 +0000 | haftmann | more explicit proofs | changeset | files |
| Wed, 01 Jul 2020 22:11:30 +0200 | wenzelm | clarified options --- potentially more robust; | changeset | files |