| Mon, 12 Dec 2011 15:01:37 -0800 | Kevin Walker | remove lemma 3.2.3 (support-shrink lemma); it was only used once | file | diff | annotate |
| Thu, 08 Dec 2011 17:41:42 -0800 | Kevin Walker | minor - Section 4 | file | diff | annotate |
| Mon, 26 Sep 2011 16:33:54 -0600 | Kevin Walker | straighten out 1-cat vs system of fields in Section 4, per referee | file | diff | annotate |