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Graphs and Matroids Seminar - Zach WalshExport this event to calendar

Wednesday, June 26, 2019 — 3:30 PM EDT

Title: Quadratically Dense Matroids

Speaker: Zach Walsh
Affiliation: University of Waterloo
Room: MC 5479

Abstract:

We discuss recent work proving that for any integer $t\ge 2$, any maximum-sized simple $\mathbb C$-representable matroid $M$ of large rank with no $U_{2,t+3}$-minor satisfies $|M|=t{r(M)\choose 2}+r(M)$. It was not our intention to prove this result, so we will first explain our original motivation. We assume only basic knowledge of matroid theory.

Joint work with Jim Geelen and Peter Nelson.

Location 
MC - Mathematics & Computer Building
5479
200 University Avenue West

Waterloo, ON N2L 3G1
Canada

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