Notions of knot concordance

Geometry Topology Working Seminar
Friday, October 7, 2016 - 2:00pm
1 hour (actually 50 minutes)
Skiles 006
Georgia Tech
The knot concordance group consists of knots in the three-sphere modulo the equivalence relation of smooth concordance. We will discuss varies ways to weaken the equivalence relation (e.g., considering locally flat concordances or concordances in more general four-manifolds) and what is known and unknown about the differences between the resulting groups.