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arXiv 0911.0628math.GR
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可数线性群的Aschbacher-O 'Nan-Scott定理

An Aschbacher--O'Nan--Scott theorem for countable linear groups

Tsachik Gelander, Yair Glasner

摘要:

本文将有限群的经典Aschbacher-O 'Nan-Scott定理推广到可数线性群类.这依赖于在以前的论文中进行的原始动作的分析。与有限群的情况不同,我们在这里证明了本原作用的数量取决于类型:几乎简单类型的线性群允许无限多(实际上是无法解释的)本原作用,而仿射群和对角群只允许一个。本原置换表示的丰富性对于刚性群如单群和算术群特别有趣。

英文摘要:

The purpose of this note is to extend the classical Aschbacher--O'Nan--Scott theorem for finite groups to the class of countable linear groups. This relies on the analysis of primitive actions carried out in a previous paper. Unlike the situation for finite groups, we show here that the number of primitive actions depends on the type: linear groups of almost simple type admit infinitely (and in fact unaccountably) many primitive actions, while affine and diagonal groups admit only one. The abundance of primitive permutation representations is particularly interesting for rigid groups such as simple and arithmetic ones.

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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