| Mon, 05 Sep 2011 12:07:16 +0000 | urbanc | added section about SUBSEQ and SUPSEQ | file | diff | annotate |
| Sun, 04 Sep 2011 00:21:41 +0000 | urbanc | removed the last two sorry's | file | diff | annotate |
| Fri, 02 Sep 2011 09:53:56 +0000 | urbanc | cleaned up proofs | file | diff | annotate |