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arXiv 2501.01360math.GR
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关于换位子具有覆盖条件的群

Groups with a covering condition on commutators

Eloisa Detomi, Marta Morigi, Pavel Shumyatsky

AI总结:

本文研究满足换位子 (k,n)-覆盖条件的群,证明其导群含有一个特征子群 B,使得指数 [G':B] 与 |B'| 均为 (k,n)-有界,从而推广了多个已有结果。

摘要:

给定一个群 G 和正整数 k,n,记 B_n=B_n(G) 为 G 中所有满足 |x^G|≤n 的元素 x 的集合;若存在 G 的子集 S 使得 |S|≤k 且 G 的所有换位子都包含在乘积 SB_n 中,则称 G 满足换位子的 (k,n)-覆盖条件。满足该条件的群的重要性在近期关于概率幂零的二类有限群的研究中得以揭示。本文得到的主要结果是如下定理。设 G 为满足换位子 (k,n)-覆盖条件的群,则 G' 含有一个特征子群 B,使得 [G':B] 与 |B'| 均为 (k,n)-有界。该结果推广了若干先前具有类似性质的结论。

英文摘要:

Given a group G and positive integers k,n, we let B_n=B_n(G) denote the set of all elements x in G such that |x^G|\leq n, and we say that G satisfies the (k,n)-covering condition for commutators if there is a subset S in G such that |S|\leq k and all commutators of G are contained in the product SB_n. The importance of groups satisfying this condition was revealed in the recent study of probabilistically nilpotent finite groups of class two. The main result obtained in this paper is the following theorem. Let G be a group satisfying the (k,n)-covering condition for commutators. Then G' contains a characteristic subgroup B such that [G':B] and |B'| are both (k,n)-bounded. This extends several earlier results of similar flavour.

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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