| Fri, 08 Dec 2017 19:25:47 +0000 | haftmann | dedicated theory for group closure | changeset | files |
| Fri, 08 Dec 2017 17:57:29 +0100 | wenzelm | clarified error; | changeset | files |
| Fri, 08 Dec 2017 16:02:44 +0100 | wenzelm | removed somewhat pointless warning; | changeset | files |
| Fri, 08 Dec 2017 15:03:54 +0100 | wenzelm | uniform use of original theory; | changeset | files |