Contact Info
Combinatorics & Optimization
University of Waterloo
Waterloo, Ontario
Canada N2L 3G1
Phone: 519-888-4567, ext 33038
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Thursday, June 6, 2019 2:30 PM EDT
Title: Hedetnemi's conjecture is false
Speaker: Ben Moore Affiliation: University of Waterloo Room: MC 5479Abstract:
On may 6th 2019, Yaroslav Shitov found a graph G x H such that the chromatic number of G x H is strictly smaller than the minimum of the chromatic number of G and the chromatic number of H. I will present the example.
Thursday, June 6, 2019 3:30 PM EDT
Title: Toric varieties from distributive lattices
Speaker: David Wagner Affiliation: University of Waterloo Room: MC 5417Abstract:
Given a nite lattice L, consider the ring of complex polynomials in indeterminates indexed by L, modulo the ideal generated by (XaXb-Xa^bXa_b for all a; b 2 L).