| Thu, 17 Aug 2017 14:28:01 +0200 | wenzelm | clarified imports; | changeset | files |
| Thu, 17 Aug 2017 14:13:34 +0200 | wenzelm | more complete session (amending 783861a66a60); | changeset | files |
| Thu, 17 Aug 2017 07:27:17 +0200 | nipkow | added lemma | changeset | files |