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Monday, September 28, 2020

Monday, September 28, 2020 — 11:30 to 11:30 AM EDT

Title: Strongly cospectral vertices, Cayley graphs and other things

Speaker: Soffia Arnadottir Affiliation: University of Waterloo Zoom: Contact Soffia Arnadottir

Abstract:

In this talk we will look at a connection between the number of pairwise strongly cospectral vertices in a translation graph (a Cayley graph of an abelian group) and the multiplicities of its eigenvalues. We will use this connection to give an upper bound on the number of pairwise strongly cospectral vertices in cubelike graphs.

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