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arXiv 2605.08596math.GR
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有限群及其Hall子群的长度参数

Length parameters of finite groups and their Hall subgroups

University of Lincoln(林肯大学);University of Brasilia(巴西利亚大学)

Evgeny Khukhro, Pavel Shumyatsky

AI总结:

研究有限群及其Hall子群的长度参数,证明若有限群G有Hallπ-子群H,则G的非p-可解长度受H的广义Fitting高度限制。

摘要:

令π是一个包含2和奇素数p的素数集。证明若有限群G有Hallπ-子群H,则G的非p-可解长度不超过H的广义Fitting高度。证明使用了在[4]中通过有限简单群分类得到的事实:有限简单群的阶若能被p整除,则不能有幂零的Hall{2,p}-子群。作为推论,证明若此外H可解,则G的非p-可解长度不超过2l_2(H)+1,其中l_2(H)是H的2-长度。

英文摘要:

Let $π$ be a set of primes containing $2$ and an odd prime $p$. It is proved that if a finite group $G$ has a Hall $π$-subgroup $H$, then the non-$p$-soluble length of $G$ is bounded above by the generalized Fitting height of $H$. The proof uses the fact, obtained in [4] using the classification of finite simple groups, that a finite simple group of order divisible by $p$ cannot have a nilpotent Hall $\{2,p\}$-subgroup. As a corollary, it is proved that if in addition $H$ is soluble, then the non-$p$-soluble length of $G$ is bounded above by $2l_2(H)+1$, where $l_2(H)$ is the $2$-length of $H$.

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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