The influence of weakly $SΦ$-supplemented subgroups on fusion systems of finite groups
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arXiv
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| Format: | Preprint |
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2023
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| _version_ | 1866910542642282496 |
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| author | Zhang, Shengmin Shen, Zhencai |
| author_facet | Zhang, Shengmin Shen, Zhencai |
| contents | Let $G$ be a finite group and $H$ be a subgroup of $G$. Then $H$ is called a weakly $SΦ$-supplemented subgroup of $G$, if there exists a subgroup $T$ of $G$ such that $G =HT$ and $H \cap T \leq Φ(H) H_{sG}$, where $H_{sG}$ denotes the subgroup of $H$ generated by all subgroups of $H$ which are $S$-permutable in $G$. Let $p$ be a prime, $S$ be a $p$-group and $\mathcal{F}$ be a saturated fusion system over $S$. Then $\mathcal{F}$ is said to be supersolvable, if there exists a series of $S$, namely $1 = S_0 \leq S_1 \leq \cdots \leq S_n = S$, such that $S_{i+1}/S_i$ is cyclic, $i=0,1,\cdots, n-1$, $S_i$ is strongly $\mathcal{F}$-closed, $i=0,1,\cdots,n$. In this paper, we investigate the structure of fusion system $\mathcal{F}_S (G)$ under the assumption that certain subgroups of $S$ are weakly $SΦ$-supplemented in $G$, and obtain several new characterizations of supersolvability of $\mathcal{F}_S (G)$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_01072 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | The influence of weakly $SΦ$-supplemented subgroups on fusion systems of finite groups Zhang, Shengmin Shen, Zhencai Group Theory 20D10, 20D15, 20D20 Let $G$ be a finite group and $H$ be a subgroup of $G$. Then $H$ is called a weakly $SΦ$-supplemented subgroup of $G$, if there exists a subgroup $T$ of $G$ such that $G =HT$ and $H \cap T \leq Φ(H) H_{sG}$, where $H_{sG}$ denotes the subgroup of $H$ generated by all subgroups of $H$ which are $S$-permutable in $G$. Let $p$ be a prime, $S$ be a $p$-group and $\mathcal{F}$ be a saturated fusion system over $S$. Then $\mathcal{F}$ is said to be supersolvable, if there exists a series of $S$, namely $1 = S_0 \leq S_1 \leq \cdots \leq S_n = S$, such that $S_{i+1}/S_i$ is cyclic, $i=0,1,\cdots, n-1$, $S_i$ is strongly $\mathcal{F}$-closed, $i=0,1,\cdots,n$. In this paper, we investigate the structure of fusion system $\mathcal{F}_S (G)$ under the assumption that certain subgroups of $S$ are weakly $SΦ$-supplemented in $G$, and obtain several new characterizations of supersolvability of $\mathcal{F}_S (G)$. |
| title | The influence of weakly $SΦ$-supplemented subgroups on fusion systems of finite groups |
| topic | Group Theory 20D10, 20D15, 20D20 |
| url | https://arxiv.org/abs/2402.01072 |