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A polynomial bound for the number of maximal systems of imprimitivity of a finite transitive permutation group
Forum Mathematicum ( IF 0.8 ) Pub Date : 2020-05-01 , DOI: 10.1515/forum-2019-0222
Andrea Lucchini 1 , Mariapia Moscatiello 1 , Pablo Spiga 2
Affiliation  

Abstract We show that there exists a constant a such that, for every subgroup H of a finite group G, the number of maximal subgroups of G containing H is bounded above by a | G : H | 3 / 2 {a\lvert G:H\rvert^{3/2}} . In particular, a transitive permutation group of degree n has at most a ⁢ n 3 / 2 {an^{3/2}} maximal systems of imprimitivity. When G is soluble, generalizing a classic result of Tim Wall, we prove a much stronger bound, that is, the number of maximal subgroups of G containing H is at most | G : H | - 1 {\lvert G:H\rvert-1} .

中文翻译:

有限传递置换群的最大非原性系统数目的多项式界限

摘要 我们证明存在一个常数 a 使得对于有限群 G 的每个子群 H,包含 H 的 G 的最大子群的数量以 a | 为界。: 高 | 3 / 2 {a\lvert G:H\rvert^{3/2}} . 特别地,一个 n 阶传递置换群至多具有 ⁢ n 3 / 2 {an^{3/2}} 个最大非原性系统。当 G 可解时,推广 Tim Wall 的经典结果,我们证明了一个更强的界,即包含 H 的 G 的最大子群数至多为 | : 高 | - 1 {\lvert G:H\rvert-1} .
更新日期:2020-05-01
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