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)
Tue, 15 Mar 2011 08:11:27 -0700 Kevin Walker thank hot topics course lecturers
Tue, 15 Mar 2011 08:01:12 -0700 Kevin Walker add definition of collaring homeo, etc.
(0) -300 -100 -30 -10 -3 +3 +10 +30 +100 tip