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SUMMARY:Hunter Spink (Stanford)
DTSTART:20210902T150000Z
DTEND:20210902T160000Z
DTSTAMP:20260423T024807Z
UID:notts_ag/77
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/notts_ag/77/
 ">Log-concavity of matroid h-vectors and mixed Eulerian numbers</a>\nby Hu
 nter Spink (Stanford) as part of Online Nottingham algebraic geometry semi
 nar\n\n\nAbstract\n(Joint with Andrew Berget and Dennis Tseng) For any mat
 roid $M$\, we compute the Tutte polynomial using the mixed intersection nu
 mbers of certain tautological classes in the combinatorial Chow ring arisi
 ng from Grassmannians. Using mixed Hodge-Riemann relations\, we deduce a s
 trengthening of the log-concavity of the h-vector of a matroid complex\, i
 mproving on an old conjecture of Dawson that was resolved contemporaneousl
 y by Ardila\, Denham\, and Huh.\n
LOCATION:https://researchseminars.org/talk/notts_ag/77/
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