02/06/2015, 15:00 — 16:00 — Sala P3.10, Pavilhão de Matemática
Louis Kauffman, University of Illinois at Chicago
Virtual knot cobordism
Virtual knot theory is a stabilized version of the classical knot theory of thickened surfaces. This talk will discuss how ideas from classical knot cobordism can be generalized to virtual knot theory and how Rasmussen’s invariants giving lower bounds for the 4-ball genus of classical knots can be generalized to virtual knots.