Algebraic Geometry Seminar

Title: Maximal Brill-Noether loci
Speaker: Asher Auel
Speaker Info: Dartmouth College
Brief Description:
Special Note:

Brill-Noether theory answers the question of whether a general curve of genus g admits a linear system of rank r and degree d. A refined Brill-Noether theory hopes to answer the question of whether a general such curve also admits a linear system of rank r’ and degree d'. In other words, we want to know about the relative position between Brill-Noether loci in the moduli space of curves of genus g. I'll explain a strategy for distinguishing Brill-Noether loci by studying the lifting of linear systems on curves in polarized K3 surfaces, which motivates a conjecture identifying the maximal Brill-Noether loci with respect to containment. Via an analysis of the stability of Lazarsfeld-Mukai bundles, we obtain new lifting results for linear systems of rank 3 which suffice to prove the maximal Brill-Noether loci conjecture in genus up to 23. This is joint work with Richard Haburcak.
Date: Friday, April 21, 2023
Time: 11:00am
Where: Tech MG28
Contact Person: Yuchen Liu
Contact email: yuchenl@northwestern.edu
Contact Phone:
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