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1:00 pm Tuesday, August 30, 2011 VIGRE TOPOLOGY SEMINAR: "Towards a geometric characterization of topologically slice knots"by Tim Cochran (Rice University) in HB 427- I describe on-going joint work with Prudence Heck in which we attempt to characterize what knots can be proved to be slice knots, in the topological category, using the current technology of 4-dim surgery. This entails trying to characterize which knots bound disks in 4-space wherein the fundamental group of the exterior is "small" (for example solvable or sub-exponential growth, or contains no free non-abelian subgroups). I will give the background and describe some of our results. This talk might be rough going for "firsties".
Submitted by cochran@rice.edu |