Fixed point ratios for finite primitive groups and applications
Fixed point ratios for finite primitive groups and applications
复制标题
有限基元组和应用的定点比率
DOI:
10.1016/j.aim.2022.108778
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发表时间:
2022
影响因子:
1.7
通讯作者:
Guralnick, Robert M.
中科院分区:
文献类型:
--
作者:
Burness, Timothy C.;Guralnick, Robert M.
Let G be a finite primitive permutation group on a set Ω and recall that the fixed point ratio of an element x∈ G, denoted fpr (x), is the proportion of points in Ω fixed by x. Fixed point ratios in this setting have been studied for many decades, finding a wide range of applications. In this paper, we are interested in comparing fpr (x) with the order of x. Our main theorem provides a classification of the triples (G, Ω, x) as above with the property that x has prime order r and fpr (x)> 1/(r+ 1). There are several applications. Firstly, we extend earlier work of Guralnick and Magaard by determining the primitive permutation groups of degree m with minimal degree at most 2 m/3. Secondly, our main result plays a key role in recent joint work with Moretó and Navarro on the commuting probability of p-elements in finite groups. Finally, we use our main theorem to investigate the minimal index of a primitive permutation group, which allows us to answer a question of Bhargava.
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影响因子:
0.9
作者:
Timothy C. Burness
通讯作者:
Timothy C. Burness
DOI:
10.4007/annals.2021.193.2.5
发表时间:
2020-06
期刊:
arXiv: Group Theory
影响因子:
--
作者:
Timothy C. Burness;R. Guralnick;Scott Harper
通讯作者:
Timothy C. Burness;R. Guralnick;Scott Harper
影响因子:
1
作者:
Burness, Timothy C.;Harper, Scott
通讯作者:
Harper, Scott
DOI:
10.1006/jabr.2000.8357
发表时间:
2000
期刊:
--
影响因子:
--
作者:
R. Guralnick;W. Kantor
通讯作者:
R. Guralnick;W. Kantor
影响因子:
0.6
作者:
Walter M. Potter
通讯作者:
Walter M. Potter