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Geometry and Topology Seminar

Friday, February 19, 2021
3:00pm to 4:00pm
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Knot Floer homology and relative adjunction inequalities
Katherine Raoux, Department of Mathematics, Michigan State University,

In this talk, we present a relative adjunction inequality for 4-manifolds with boundary. We begin by constructing generalized Heegaard Floer tau-invariants associated to a knot in a 3-manifold and a nontrivial Floer class. Given a 4-manifold with boundary, the tau-invariant associated to a Floer class provides a lower bound for the genus of a properly embedded surface, provided that the Floer class is in the image of the cobordism map induced by the 4-manifold. We will also discuss some applications to links and contact manifolds. This is joint work with Matthew Hedden.

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