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Thursday, September 29, 2016 — 3:30 PM EDT

Title: Circle Graph Obstructions

Speaker: Edward Lee
Affiliation: University of Waterloo
Room: MC 5479

Abstract:

A circle graph is the intersection graph of a set of chords drawn on a circle.  We present a graphic proof of Bouchet's characterization of the class of circle graphs. 

Friday, September 23, 2016 — 3:30 PM EDT

Title: Convex Drawings of K(n)   

Speaker: Bruce Richter
Affiliation: University of Waterloo
Room: MC 5501

Abstract:

Bruce Richter's Abstract

Thursday, September 22, 2016 — 3:30 PM EDT

Title: Unavoidable minors for k-connectivity: a generalization of the Grid Theorem (Part 2 of 2)

Speaker: Benson Joeris
Affiliation: University of Waterloo
Room: MC 5479

Abstract:

Friday, September 16, 2016 — 3:30 PM EDT

Title: Loci of Complex Polynomials

Speaker: Hristo Sendov
Affiliation: University of Western Ontario
Room: MC 5501

Abstract for Tutte Colloquium

Thursday, September 15, 2016 — 3:30 PM EDT

Title: Stronger Rolle's Theorem for Complex Polynomials

Speaker: Hristo Sendov
Affiliation: University of Western Ontario
Room: MC 5501

Abstract:

Thursday, September 15, 2016 — 3:30 PM EDT

Title: Unavoidable minors for k-connectivity: a generalization of the Grid Theorem

Speaker: Benson Joeris
Affiliation: University of Waterloo
Room: MC 5479

Abstract:

Thursday, September 15, 2016 — 2:00 PM EDT

Title: New spectral bounds on the chromatic number

Speaker: Sina Rezazadeh
Affiliation: University of Waterloo
Room: MC 6486

Abstract:

Thursday, September 8, 2016 — 2:00 PM EDT

Title: Cospectral graphs, cospectral complements

Speaker: Chris Godsil
Affiliation: University of Waterloo
Room: MC 6486

Abstract:

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