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arXiv 1707.00643math.AGcs.CG
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Picard数2的某个K3曲面上的秩2不稳定Lazarsfeld-Mukai丛

Unstable Lazarsfeld-Mukai bundles of rank 2 on a certain K3 surface of Picard number 2

Kenta Watanabe

摘要:

令$g$和$c$是满足$g\geq3$和$0\leq c\leq \lfloor\frac{g-1}{2}\rfloor$的任意整数。已知存在极化K3表面$(X,H)$,使得$X$是Picard数为2的K3表面,并且$H$是$X$上的截面亏格为$g$和Clifford指数为$c$的非常充分的线丛,由Johnsen和Knutsen([J-K]和[Kn])。本文给出了一个秩为2的Lazarssen-Mukai丛与属于线性系统$|H|$的光滑曲线$C$和$C$上的基点自由束相关联的不具有$H$ -斜率稳定性的充要条件.

英文摘要:

Let $g$ and $c$ be any integers satisfying $g\geq3$ and $0\leq c\leq \lfloor\frac{g-1}{2}\rfloor$. It is known that there exists a polarized K3 surface $(X,H)$ such that $X$ is a K3 surface of Picard number 2, and $H$ is a very ample line bundle on $X$ of sectional genus $g$ and Clifford index $c$, by Johnsen and Knutsen([J-K] and [Kn]). In this paper, we give a necessary and sufficient condition for a Lazarsfeld-Mukai bundles of rank 2 associated with a smooth curve $C$ belonging to the linear system $|H|$ and a base point free pencil on $C$ not to be $H$-slope stable.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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