| Fri, 08 Jan 2010 10:08:01 +0100 | Cezary Kaliszyk | Proved concat_empty. | file | diff | annotate |
| Thu, 07 Jan 2010 16:51:38 +0100 | Cezary Kaliszyk | Replacing equivp by reflp in the assumptions leads to non-provable subgoals in the gen_pre lemmas. | file | diff | annotate |