| Mon, 25 Jan 2010 18:52:22 +0100 | Christian Urban | properly commented out the "unused lemmas section" and moved actually used lemmas elsewhere; added two minor items to the TODO list | file | diff | annotate |
| Mon, 25 Jan 2010 17:53:08 +0100 | Christian Urban | cleaned some theorems | file | diff | annotate |
| Thu, 21 Jan 2010 12:50:43 +0100 | Cezary Kaliszyk | Lifted Peter's Sigma lemma with Ex1. | file | diff | annotate |