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arXiv 2004.11715math.AG
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双有理自同构群的有限子群是类至多为2的“几乎”幂零群

Finite subgroups of the birational automorphism group are 'almost' nilpotent of class at most two

Attila Guld

摘要:

我们称一个群$G$为类至多为$c$ $(c\in\mathbb{N})$的幂零Jordan群,如果存在一个常数$J\in\mathbb{Z}^+$使得每个有限子群$H\leqq G$包含一个类至多为$c$且指数至多为$J$的幂零子群$K\leqq H$.证明了特征为零的域上簇的双有理自同构群是至多2类的幂零若当群。

英文摘要:

We call a group $G$ nilpotently Jordan of class at most $c$ $(c\in\mathbb{N})$ if there exists a constant $J\in\mathbb{Z}^+$ such that every finite subgroup $H\leqq G$ contains a nilpotent subgroup $K\leqq H$ of class at most $c$ and index at most $J$. We show that the birational automorphism group of a variety over a field of characteristic zero is nilpotently Jordan of class at most two.

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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