| 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 |
| Wed, 12 Oct 2011 15:10:54 -0700 | Kevin Walker | operad action only up to homotopy; still need to think about this a bit | file | diff | annotate |
| Sun, 25 Sep 2011 22:31:22 -0600 | Kevin Walker | remove TOP; searched of "topological" and "PL" to find places where we mention TOP | file | diff | annotate |