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Monday, October 26, 2020

Monday, October 26, 2020 — 11:30 to 11:30 AM EDT

Title: Pseuodrandom Cliquefree Graphs, Finite Geometry, and Spectra

Speaker: Ferdinand Ihringer Affiliation: Ghent University, Belgium Zoom: Contact Soffia Arnadottir

Abstract:

A regular graph is called optimally pseudorandom if its second largest eigenvalue in absolute value is, up to a constant factor, as small as possible. Determining the largest degree of an optimally pseudorandom graph without a clique of size s is a well-known open problem in extremal graph theory.

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