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Please note: The University of Waterloo is closed for all events until further notice.

Events by date

Friday, June 18, 2021

Friday, June 18, 2021 — 11:30 to 11:30 AM EDT

Title: The spectral radius of graphs with no odd wheels

Speaker: Dheer Noal Desai Affiliation: University of Delaware Zoom: Contact Soffia Arnadottir

Abstract:

The odd wheel W_{2k+1} is the graph formed by joining a vertex to a cycle of length 2k. In this talk, we will investigate the largest value of the spectral radius of the adjacency matrix of an n-vertex graph that does not contain W_{2k+1}.

Friday, June 18, 2021 — 3:30 PM EDT

Title: Lattice Walk Enumeration: Analytic, algebraic and geometric aspects

Speaker: Marni Mishna  Affliliation: Simon Fraser University Zoom: Contact Emma Watson

Abstract:

This talk will examine the rich topic of lattice path enumeration. A very classic object of combinatorics, lattice walks withstand study from a variety of perspectives. Even the simple task of classifying the two dimensional walks restricted to the first quadrant has brought into play a surprising diversity of techniques from algebra to analysis to geometry. We will consider walks under a few different lenses.

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