The Bogomolov multiplier of finite simple groups

The Bogomolov multiplier of finite simple groups
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有限单群的博戈莫洛夫乘子

DOI:
10.1007/978-0-8176-4934-0
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发表时间:
2007
期刊:
arXiv: Group Theory
影响因子:
--
通讯作者:
B. Kunyavskii
B. Kunyavskii
中科院分区:
--
文献类型:
--
作者:
B. Kunyavskii

文献摘要

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有限群G的Schur乘子的子群称为G的Bogomolov乘子,G的Schur乘子是由G的任意交换子群的限制为零的所有上同调类组成的。证明了若G是拟单或几乎单的,则除PSL(3,4)的某些覆盖外,G的Bogomolov乘子是平凡的.
The subgroup of the Schur multiplier of a finite group G consisting of all cohomology classes whose restriction to any abelian subgroup of G is zero is called the Bogomolov multiplier of G. We prove that if G is quasisimple or almost simple, its Bogomolov multiplier is trivial except for the case of certain covers of PSL(3, 4).