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arXiv 2303.07784math.GTmath.ATmath.GR
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大型有限群在流形上的作用

Actions of large finite groups on manifolds

Ignasi Mundet i Riera

AI总结:

本文综述有限群在拓扑流形上作用的最新成果,涵盖群代数结构与作用几何性质两方面,给出作用限制在指数仅依赖于流形$X$的子群时的相关信息。

摘要:

本文综述了有限群在拓扑流形上作用的若干最新研究成果。对于有限群$G$在流形$X$上的给定作用,这些成果给出了作用限制在$G$的某个子群上的相关信息,该子群的指数有仅依赖于$X$的上界。部分成果涉及群的代数结构,例如群是否为阿贝尔群、幂零群,或是否存在大小受控的生成子集;其他成果则涉及作用的几何性质,例如不动点的存在性、稳定子群的集合,或在上同调上的作用。

英文摘要:

In this paper we survey some recent results on actions of finite groups on topological manifolds. Given an action of a finite group $G$ on a manifold $X$, these results provide information on the restriction of the action to a subgroup of $G$ of index bounded above by a number depending only on $X$. Some of these results refer to the algebraic structure of the group, such as being abelian, or nilpotent, or admitting a generating subset of controlled size; other results refer to the geometry of the action, e.g. to the existence of fixed points, to the collection of stabilizer subgroups, or to the action on cohomology.

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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