| Wed, 14 Sep 2011 13:39:03 +0000 | urbanc | polished the non-regularity proof | file | diff | annotate |
| Wed, 14 Sep 2011 13:00:44 +0000 | urbanc | clarified proof about non-regularity | file | diff | annotate |
| Mon, 05 Sep 2011 20:59:50 +0000 | urbanc | tuning on the derivatives and closures theories | file | diff | annotate |