Intersection density of transitive groups with cyclic point stabilizers
Abstract
For a permutation group acting on a set , a subset of is said to be an intersecting set if for every pair of elements there exists such that . The intersection density of a transitive permutation group is the maximum value of the quotient where is a stabilizer of a point and runs over all intersecting sets in . If is a largest intersecting set in then is said to have the Erd\H{o}s-Ko-Rado (EKR)-property. This paper is devoted to the study of transitive permutation groups, with point stabilizers of prime order with a special emphasis given to orders 2 and 3, which do not have the EKR-property. Among other, constructions of infinite family of transitive permutation groups having point stabilizer of order with intersection density and of infinite families of transitive permutation groups having point stabilizer of order with arbitrarily large intersection density are given.
Keywords
Cite
@article{arxiv.2201.11015,
title = {Intersection density of transitive groups with cyclic point stabilizers},
author = {Ademir Hujdurović and István Kovács and Klavdija Kutnar and Dragan Marušič},
journal= {arXiv preprint arXiv:2201.11015},
year = {2022}
}
Comments
14 pages