William Newman of Ohio State University (OSU) : Chow rings of moduli spaces of genus 0 curves with collisions

Posted by Philip Engel , part of the Algebraic Geometry Seminar.

At

Sept. 14, 2026, 3 p.m.

In

427 SEO

Abstract

Simplicially stable spaces are alternative compactifications of M_{g,n} generalizing Hassett’s moduli spaces of weighted stable curves. We give presentations of the Chow rings of these spaces in genus 0. When considering the special case of \bar M_{0,n}, this gives a new proof of Keel’s presentation of CH(\bar M_{0,n}).