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arXiv 2407.09178math.AGmath.CV
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双曲凯勒流形的全纯拉格朗日纤维化II

Shafarevich-Tate groups of holomorphic Lagrangian fibrations II

Anna Abasheva

AI总结:

本文研究了双曲凯勒流形的全纯拉格朗日纤维化II,探讨了Shafarevich-Tate扭的性质及其与凯勒流形的关系。

摘要:

设X是一个紧凯勒流形,其上有一个拉格朗日纤维化π:X→B。X的Shafarevich-Tate扭是另一个全纯辛流形,其上有一个拉格朗日纤维化π^φ:X^φ→B,它在基底上局部同构于π。特别地,π^φ的纤维与π相同。一个扭X^φ对应于X的Shafarevich-Tate群中的一个元素φ。我们证明当φ的某个倍数位于Shafarevich-Tate群的连通分支中时,X^φ是凯勒的,并给出了X^φ与凯勒流形双射的必要条件。

英文摘要:

Let $X$ be a compact hyperkähler manifold with a Lagrangian fibration $π\colon X\to B$. A Shafarevich-Tate twist of $X$ is a holomorphic symplectic manifold with a Lagrangian fibration $π^φ\colon X^φ\to B$ which is isomorphic to $π$ locally over the base. In particular, $π^φ$ has the same fibers as $π$. A twist $X^φ$ corresponds to an element $φ$ in the Shafarevich-Tate group of $X$. We show that $X^φ$ is Kähler when a multiple of $φ$ lies in the connected component of unity of the Shafarevich-Tate group and give a necessary condition for $X^φ$ to be bimeromorphic to a Kähler manifold.

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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