Talks
Spring 2019
![](https://old.simons.berkeley.edu/sites/default/files/styles/workshop_main/public/graph-01.png?itok=iLJdtG-6)
Simplicial Generation of Chow Rings of Matroids
Wednesday, September 9th, 2020, 9:00 am–9:50 am
Speaker:
Chris Eur (Stanford University)
We introduce a new set of generators for the Chow ring of a matroid. Geometrically, these generators behave like base-point-free divisors on a projective variety, and combinatorially, they encode matroid operations called principal truncations. By combining the theory of Lorentzian (a.k.a. strongly log-concave) polynomials with the properties of these generators, we obtain a simplified proof of the degree one Hodge-Riemann relations for matroids, which is the combinatorially relevant portion of the Hodge theory of matroids by Adiprasito-Huh-Katz.