Algebraic Geometry Seminar
Ana-Maria Castravet
University of Arizona Tucson
Hypergraphs and moduli of curves
Abstract: We give many examples of extremal divisors, rigid curves, and birational
morphisms with unexpected properties for the Grothendieck--Knudsen moduli
space $\bar M_{0,n}$ of stable rational curves. The basic tool is an
isomorphism between $M_{0,n}$ and the Brill--Noether locus of a very
special reducible curve corresponding to a hypergraph. This is joint work
with Jenia Tevelev.
Friday October 24, 2008 at 4:00 PM in SEO 636