| Fri, 28 Jan 2011 19:17:40 +0000 | urbanc | slightly tuned the main lemma and the finiteness proofs | file | diff | annotate |
| Fri, 28 Jan 2011 11:52:11 +0000 | zhang | More improvement | file | diff | annotate |
| Thu, 27 Jan 2011 16:58:11 +0000 | urbanc | added my changes again | file | diff | annotate |