| Fri, 11 Feb 2011 13:30:37 +0000 | urbanc | included comments by Xingyuan | file | diff | annotate |
| Thu, 10 Feb 2011 21:00:40 +0000 | urbanc | simplified a bit the proof | file | diff | annotate |
| Thu, 10 Feb 2011 13:10:16 +0000 | urbanc | more things | file | diff | annotate |
| Thu, 10 Feb 2011 12:32:45 +0000 | urbanc | latest on the paper | file | diff | annotate |
| Thu, 10 Feb 2011 08:40:38 +0000 | urbanc | more on the paper | file | diff | annotate |
| Thu, 10 Feb 2011 05:57:56 +0000 | urbanc | more on paper | file | diff | annotate |