关于简单经典群谱的几乎可识别性

IF 0.7 Q2 MATHEMATICS
A. Staroletov
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引用次数: 3

摘要

有限群$G$的元素阶的集合称为{em谱}}。具有相同光谱的基团被称为{em等光谱}。已知如果$G$有一个非平凡的正规可溶子群,则存在无穷多个与$G$ $等谱的对非同构群。如果$G$是一个不可定义的简单群,情况就大不相同了。最近证明了如果$L$是一个维数至少为62的简单经典群,并且$G$是一个与$L$ $等值谱的有限群,那么$Lleq GleqAut L$ $是同构的。我们表明,如果62被38取代,断言仍然为真。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
On almost recognizability by spectrum of simple classical groups
‎The set of element orders of a finite group $G$ is called the {em spectrum}‎. ‎Groups with coinciding spectra are said to be {em isospectral}‎. ‎It is known that if $G$ has a nontrivial normal soluble subgroup then there exist infinitely many pairwise non-isomorphic‎ ‎groups isospectral to $G$‎. ‎The situation is quite different if $G$ is a nonabelain simple group‎. ‎Recently it was proved that if $L$ is a simple classical group of dimension at least 62 and $G$ is a finite group‎ ‎isospectral to $L$‎, ‎then up to isomorphism $Lleq GleqAut L$‎. ‎We show that the assertion remains true‎ ‎if 62 is replaced by 38‎.
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来源期刊
CiteScore
0.90
自引率
0.00%
发文量
1
审稿时长
30 weeks
期刊介绍: International Journal of Group Theory (IJGT) is an international mathematical journal founded in 2011. IJGT carries original research articles in the field of group theory, a branch of algebra. IJGT aims to reflect the latest developments in group theory and promote international academic exchanges.
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