English

On the EKR Module property

Combinatorics 2024-04-17 v2

Abstract

In the recent years, the generalization of the Erd\H{o}s-Ko-Rado (EKR) theorem to permutation groups has been of much interest. A transitive group is said to satisfy the EKR-module property if the characteristic vector of every maximum intersecting set is a linear combination of the characteristic vectors of cosets of stabilizers of points. This generalization of the well-know permutation group version of the Erd\H{o}s-Ko-Rado (EKR) theorem, was introduced by K. Meagher. In this article, we present several infinite families of permutation groups satisfying the EKR-module property, which shows that permutation groups satisfying this property are quite diverse.

Keywords

Cite

@article{arxiv.2207.05947,
  title  = {On the EKR Module property},
  author = {Cai Heng Li and Venkata Raghu Tej},
  journal= {arXiv preprint arXiv:2207.05947},
  year   = {2024}
}

Comments

Revised and trimmed for better readability. To appear in Algebraic Combinatorics

R2 v1 2026-06-25T00:52:10.573Z