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Geometry-Topology Seminar

Thursday, April 5, 2012 - 4:30pm

Patricia Cahn

Dartmouth College

Location

University of Pennsylvania

DRL 4C8

We introduce virtual Legendrian knots. We then construct an isomorphism between the groups of Vassiliev invariants of virtual Legendrian knots and of virtual framed knots in the total space of the spherical cotangent bundle of a surface. This builds on results of Fuchs-Tabachnikov, Goryunov, Hill and Chernov about isomorphisms of groups of Vassiliev invariants of (nonvirtual) Legendrian and topological knots. This is joint work with Asa Levi.