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

Events by date

Thursday, February 27, 2020

Thursday, February 27, 2020 — 1:00 PM EST

Title: Linear Programming and Extremal Expanders

Speaker: Sabrina Lato Affiliation: University of Waterloo Room: MC 5417

Abstract:

Nozaki proved a linear programming bound on the number of vertices that depends on the eigenvalues of a graph.

Thursday, February 27, 2020 — 2:30 PM EST

Title: An equivariant basis for the cohomology of Springer fibers

Speaker: Ed Richmond Affiliation: Oklahoma State University Room: MC 5417

Abstract:

Springer fibers are subvarieties of the flag variety that play an important role in combinatorics and geometric representation theory. In this talk, I will discuss joint work with Martha Precup where we analyze the equivariant cohomology of Springer fibers in type A.

Thursday, February 27, 2020 — 4:00 PM EST

Title: Excluding an asymmetric group labelled graph

Speaker: Farbod Yadegarian Affiliation: University of Waterloo Room: MC 5479

Abstract:

There are several models of group labelled graphs. In the simpler, undirected model, for an abelian group Γ, every edge e receives a label γ(e) in Γ. 

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