| Tue, 15 Mar 2011 16:49:49 -0700 | Kevin Walker | tried to clarify the spirally nature of the axioms in the intro to the ncat section; other word-smithing in that intro; added remark about C(0-sphere) | file | diff | annotate |
| Tue, 15 Mar 2011 08:01:12 -0700 | Kevin Walker | add definition of collaring homeo, etc. | file | diff | annotate |