| Fri, 08 Jan 2010 10:08:01 +0100 | Cezary Kaliszyk | Proved concat_empty. | file | diff | annotate |
| Wed, 06 Jan 2010 09:19:23 +0100 | Cezary Kaliszyk | Tried to prove the lemma manually; only left with quotient proofs. | file | diff | annotate |
| Wed, 06 Jan 2010 08:24:37 +0100 | Cezary Kaliszyk | Sledgehammer bug. | file | diff | annotate |