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Geometry-Topology Seminar

Thursday, January 26, 2023 - 5:15pm

Rebekah Palmer

Temple University

Location

University of Pennsylvania

DRL 4C8

Studying totally geodesic surfaces has been essential in understanding the geometry and topology of hyperbolic 3-manifolds.  Recently, Bader-Fisher-Miller-Stover showed that containing infinitely many such surfaces compels a manifold to be arithmetic.  We are hence interested in counting totally geodesic surfaces in hyperbolic 3-manifolds in the finite (possibly zero) case.  In joint work with Khánh Lê, we expand an obstruction, due to Calegari, to the existence of these surfaces.  On the flipside, we prove the uniqueness of known totally geodesic surfaces by considering their behavior in the universal cover.  This talk will explore this progress for both the uniqueness and the absence.