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arXiv 1704.08652math.AG
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当Albanese射是正特征的代数纤维空间时?

When is the Albanese morphism an algebraic fiber space in positive characteristic?

Sho Ejiri

摘要:

本文研究了具有正特征的Albanese态射。在一般纤维是$F$ -纯的假设下,我们证明了具有nef反典范除子的簇的Albanese态射是代数纤维空间。此外,我们考虑了态射的$F$ -分裂的概念,并研究了Albanese态射的$F$ -分裂。证明了$F$ -分裂簇具有$F$ -分裂Albanese态射,并且$F$ -分裂Albanese态射是代数纤维空间.作为应用,我们给出了阿贝尔簇的一个新的刻画。

英文摘要:

In this paper, we study the Albanese morphisms in positive characteristic. We prove that the Albanese morphism of a variety with nef anti-canonical divisor is an algebraic fiber space, under the assumption that the general fiber is $F$-pure. Furthermore, we consider a notion of $F$-splitting for morphisms, and investigate it of the Albanese morphisms. We show that an $F$-split variety has $F$-split Albanese morphism, and that the $F$-split Albanese morphism is an algebraic fiber space. As an application, we provide a new characterization of abelian varieties.

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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