arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.05473math.AG
收藏

阿贝尔簇的不变Brauer群

Invariant Brauer group of an abelian variety

Martin Orr, Alexei N. Skorobogatov, Domenico Valloni, Yuri G. Zarhin

摘要:

我们研究了一个新的对象,可以附加到一个阿贝尔簇或复杂的环面:不变Brauer群,最近定义的杨曹。在复数域上,这是一个初等阿贝尔2-群,其秩有一个明确的上界。我们展示了许多情况下,不变的布劳尔群是零,并构造复杂的阿贝尔簇在每一个维度从2开始,简单和非简单的,不变的布劳尔群的顺序为2。我们还讨论了有限特征域和非闭域上的情形。

英文摘要:

We study a new object that can be attached to an abelian variety or a complex torus: the invariant Brauer group, as recently defined by Yang Cao. Over the field of complex numbers this is an elementary abelian 2-group with an explicit upper bound on the rank. We exhibit many cases in which the invariant Brauer group is zero, and construct complex abelian varieties in every dimension starting with 2, both simple and non-simple, with invariant Brauer group of order 2. We also address the situation in finite characteristic and over non-closed fields.

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。

↑