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Maximal Brill-Noether loci via K3 surfaces

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We explain a strategy for distinguishing Brill-Noether loci in the moduli space of curves 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 9-19, 22, and 23.

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Brill--Noether loci in genus $\leq 12$

math.AG · 2025-07-07 · conditional · novelty 7.0

For every genus g ≤ 12, the paper identifies exactly which Brill–Noether loci are contained in which, yielding a complete relative-position classification.

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  • Brill--Noether loci in genus $\leq 12$ math.AG · 2025-07-07 · conditional · none · ref 5 · internal anchor

    For every genus g ≤ 12, the paper identifies exactly which Brill–Noether loci are contained in which, yielding a complete relative-position classification.