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Geometry Seminar: Eduardo Reyes (University of California, Berkeley): Approximating hyperbolic lattices by cubulations

Ort: MPI für Mathematik in den Naturwissenschaften Leipzig, Inselstr. 22, E2 10 (Leon-Lichtenstein)

Vortrag in der Reihe: Geometry Seminar The fundamental group of an n-dimensional closed hyperbolic manifold admits a natural isometric action on the hyperbolic space H^n. If n is at most 3 or the manifold is arithmetic of simplest type, then the group also admits many geometric actions on CAT(0) cube complexes. I will talk about a joint work with Nic Brody in which we approximate the asymptotic geometry of the action on H^n by the actions on these complexes, solving a conjecture of Futer and Wise. The main tool is a codimension-1 generalization of the space of geodesic currents introduced by Bonahon. In the 3-dimensional case, we also use some results about minimal surfaces in hyperbolic 3-manifolds.

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Beginn: Dec. 5, 2023, 1:30 p.m.

Ende: Dec. 5, 2023, 3 p.m.