Skip to main content
8 events
when toggle format what by license comment
Dec 8, 2011 at 6:13 vote accept Sam Nolen
Dec 6, 2011 at 18:19 answer added Tom Goodwillie timeline score: 18
Dec 6, 2011 at 12:14 history edited Sam Nolen CC BY-SA 3.0
added 3 characters in body
Dec 6, 2011 at 11:20 comment added Fabian Lenhardt Another kind of obstruction appears in the Rothenberg sequence:The surgery-relevant L-theory of the group ring is only "well-behaved" if the lower K-groups of the group ring vanish.
Dec 6, 2011 at 7:41 comment added Ryan Budney Martin, the answer is yes. These have to do with the homotopy-type of concordance / pseudo-isotopy spaces. Hatcher, Wagoner, Igusa and Waldhausen are relevant authors.
Dec 6, 2011 at 7:31 comment added Martin Brandenburg Interesting, 1+. Related question: Are there interesting obstructions in even higher $K$-groups, say $K_2(\mathbb{Z}\pi)$?
Dec 6, 2011 at 6:58 answer added Tim Porter timeline score: 13
Dec 6, 2011 at 5:04 history asked Sam Nolen CC BY-SA 3.0