On finite 𝜎-tower groups

IF 0.4 3区 数学 Q4 MATHEMATICS Journal of Group Theory Pub Date : 2022-08-02 DOI:10.1515/jgth-2022-0058
Jinzhuan Cai, Zhigang Wang, I. N. Safonova, A. Skiba
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引用次数: 1

Abstract

Abstract In this paper, 𝐺 is a finite group and 𝜎 a partition of the set of all primes ℙ, that is, σ = { σ i ∣ i ∈ I } \sigma=\{\sigma_{i}\mid i\in I\} , where P = ⋃ i ∈ I σ i \mathbb{P}=\bigcup_{i\in I}\sigma_{i} and σ i ∩ σ j = ∅ \sigma_{i}\cap\sigma_{j}=\emptyset for all i ≠ j i\neq j . If 𝑛 is an integer, we write σ ⁢ ( n ) = { σ i ∣ σ i ∩ π ⁢ ( n ) ≠ ∅ } \sigma(n)=\{\sigma_{i}\mid\sigma_{i}\cap\pi(n)\neq\emptyset\} and σ ⁢ ( G ) = σ ⁢ ( | G | ) \sigma(G)=\sigma(\lvert G\rvert) . A group 𝐺 is said to be 𝜎-primary if 𝐺 is a σ i \sigma_{i} -group for some i = i ⁢ ( G ) i=i(G) and 𝜎-soluble if every chief factor of 𝐺 is 𝜎-primary. We say that 𝐺 is a 𝜎-tower group if either G = 1 G=1 or 𝐺 has a normal series 1 = G 0 < G 1 < ⋯ < G t - 1 < G t = G 1=G_{0}
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有限的𝜎-tower群
摘要:𝐺是一个有限群,而φ是所有素数集合的一个划分,即σ = { σ i∣i∈i } \sigma={\sigma_{I}\mid I\in I},其中P =∈I σ I \mathbb{P}=\bigcup_{I\in I}\sigma_{I} σ I∩σ j =∅ \sigma_{I}\cap\sigma_{j}=\emptyset 对于所有I≠j I\neq J。如果𝑛是整数,我们写∑∑(n) = { σ I∣σ I∩π≠∅ } \sigma(n)={\sigma_{I}\mid\sigma_{I}\cap\pi(n)\neq\emptyset}和σ _ (G) = σ _ (| G |) \sigma(g)=\sigma(\lvert g\rvert) . 如果𝐺是σ i,则称群𝐺为𝜎-primary \sigma_{I} -group对于i=i∑(G) i=i(G)和𝜎-soluble如果𝐺的每个主因子都是𝜎-primary。我们说𝐺是一个𝜎-tower群,如果G=1 G=1或𝐺有一个正规级数1= g0 < g1 <⋯< gt - 1 < gt = g1 =G_{0}< g_{1}<\cdots< g_{t-1}< g_{t}=G使得g1 / g1 - 1g_{I}/ g_{i-1} 是σ I \sigma_{I} -group, σ i∈σ≠(G) \sigma_{I}\in\sigma(G), G/G i G/G_{I} g1 - 1g_{i-1} σ I ' \sigma_{I}^{\prime} -group for所有I =1,…,t I =1,\ldots,t。如果存在子群链A=A 0≤A 1≤⋯≤A t = G A=A_,则称𝐺中的一个子群的变量为𝜎-subnormal{0}\leq a……{1}\leq\cdots\leq a……{t}=G使得A i - 1∑⊴∑A i a__{i-1}\trianglelefteq a……{I} 或者A i / (A i - 1) A i A_{I}/(a){i-1}){a……{I}} 是𝜎-primary对于所有I =1,…,t I =1,\ldots,t。在本文中,[A. N.]Skiba,关于有限群的𝜎-subnormal和𝜎-permutable子群,[j] .代数436(2015),1 - 16,证明了一个𝜎-soluble群G≠1g\neq 1,∑∑(G) | = n \lvert\sigma(g)\rvert如果=n的每一个(n+1) (n+1)极大子群都是𝐺中的𝜎-subnormal,则=n是一个𝜎-tower群。
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来源期刊
Journal of Group Theory
Journal of Group Theory 数学-数学
CiteScore
1.00
自引率
0.00%
发文量
45
审稿时长
6 months
期刊介绍: The Journal of Group Theory is devoted to the publication of original research articles in all aspects of group theory. Articles concerning applications of group theory and articles from research areas which have a significant impact on group theory will also be considered. Topics: Group Theory- Representation Theory of Groups- Computational Aspects of Group Theory- Combinatorics and Graph Theory- Algebra and Number Theory
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