Wednesday, April 3, 2019

Wednesday, April 3, 2019 — 4:30 PM EDT

Title: A proof of the Hell-Nešetřil Dichotomy via Siggers Polymorphisms

Speaker: Ben Moore Affiliation: University of Waterloo Room: MC 4020

Abstract:

In 2017, the constraint satisfaction dichotomy was proven via techniques from universal algebra. If we restrict this theorem to graphs, we get the Hell-Nešetřil Dichotomy, which is a statement about colouring graphs.

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