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arXiv 1807.03550math.GR
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元素的共轭类、特征标和乘积

Conjugacy classes, characters and products of elements

Robert M. Guralnick, Alexander Moretó

摘要:

最近,Baumslag和Wiegold证明了有限群$G$是幂零的当且仅当对每个互质序的$x,y\in G$有$o(xy)=o(x)o(y)$.受此结果的启发,我们研究了具有$(xy)^G=x^Gy^G$性质的群和具有$χ(xy)=χ(x)χ(y)$性质的群,其中$G$的每个复不可约特征标$χ$和每个两两互质序的非平凡$x, y \in G$都有$(xy)^G=x^Gy^G$性质。我们还考虑了几种削弱关于$x$和$y$的假设的方法。虽然鲍姆斯拉格和韦戈尔德的结果是完全初等的,但我们在这里的一些论点依赖于有限单群的分类(部分)。

英文摘要:

Recently, Baumslag and Wiegold proved that a finite group $G$ is nilpotent if and only if $o(xy)=o(x)o(y)$ for every $x,y\in G$ of coprime order. Motivated by this result, we study the groups with the property that $(xy)^G=x^Gy^G$ and those with the property that $χ(xy)=χ(x)χ(y)$ for every complex irreducible character $χ$ of $G$ and every nontrivial $x, y \in G$ of pairwise coprime order. We also consider several ways of weakening the hypothesis on $x$ and $y$. While the result of Baumslag and Wiegold is completely elementary, some of our arguments here depend on (parts of) the classification of finite simple groups.

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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