| Fri, 14 Oct 2011 08:35:15 -0700 | Kevin Walker | added some 'disk-like's in intro; other minor changes in intro; broke some lines | file | diff | annotate |
| Fri, 14 Oct 2011 07:48:41 -0700 | Kevin Walker | changing general map thm to remark, as suggested by referee | file | diff | annotate |