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arXiv · 2601.14709

Brill--Noether Generality of Curves and K3 Surfaces

Irina Shatova
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Abstract

Lazarsfeld proved Brill--Noether generality of any smooth curve in the linear system $|H|$ where $(X,H)$ is a polarized K3 surface with $\operatorname{Pic}(X) = \mathbb{Z}\cdot H$. Mukai introduced the notion of Brill--Noether generality for quasi-polarized K3 surfaces. We prove Brill--Noether generality of any smooth curve in the linear system $|H|$ where $(X,H)$ is a Brill--Noether general quasi-polarized K3 surface. We also prove that Petri homomorphism is an isomorphism for each extremal line bundle on a general curve $C \in |H|$.

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Irina Shatova. 2026-01-21. Brill--Noether Generality of Curves and K3 Surfaces. https://arxiv.org/abs/2601.14709

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