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北美退伍军人节(Veterans Day),12 日无更新
arXiv 2101.11541math.GR
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部分GVZ-群

Partial GVZ-groups

Shawn T. Burkett, Mark L. Lewis

摘要:

根据文献,一个群$G$称为中心型群,如果$G$有一个不可约特征标在$G\setminus Z(G)$上为零。受此定义的启发,如果$χ$在$G\setminus Z(χ)$上消失,则我们说字符$χ\in {\rm Irr}(G)$具有中心类型,其中$Z(χ)$是$χ$的中心。所有不可约特征标都有中心类型的群以前在文献中被称为GVZ-群(和其他几个名字)。本文研究了群$G$,它具有一个非平凡的正规子群$N$,使得$G$的每一个特征标要么在其核中包含$N$,要么具有中心类型.这些基团的结构令人惊讶地受到限制,并且与中心型基团和GVZ-基团具有许多共同之处。

英文摘要:

Following the literature, a group $G$ is called a group of central type if $G$ has an irreducible character that vanishes on $G\setminus Z(G)$. Motivated by this definition, we say that a character $χ\in {\rm Irr}(G)$ has central type if $χ$ vanishes on $G\setminus Z(χ)$, where $Z(χ)$ is the center of $χ$. Groups where every irreducible character has central type have been studied previously under the name GVZ-groups (and several other names) in the literature. In this paper, we study the groups $G$ that possess a nontrivial, normal subgroup $N$ such that every character of $G$ either contains $N$ in its kernel or has central type. The structure of these groups is surprisingly limited and has many aspects in common with both central type groups and GVZ-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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