Sun, 10 Jul 2011 14:52:33 -0600 Kevin Walker very minor
Sun, 10 Jul 2011 14:43:19 -0600 Kevin Walker no splittability requirement for k=n
Tue, 05 Jul 2011 13:28:02 -0600 Kevin Walker fixing proof of 7.1.1 (product thm)
Mon, 04 Jul 2011 11:35:27 -0600 Kevin Walker remark about families of collar maps acting; misc
(0) -300 -100 -30 -10 -4 +4 +10 +30 +100 tip