Frankl's diversity theorem for permutations
Combinatorics
2026-02-13 v1 Discrete Mathematics
Abstract
In 1987, Frankl proved an influential stability result for the Erd\H os--Ko--Rado theorem, which bounds the size of an intersecting family in terms of its distance from the nearest (subset of) star or trivial intersecting family. It is a far-reaching extension of the Hilton--Milner theorem. In this paper, we prove its analogue for permutations on , provided is large. This provides a similar extension of a Hilton--Milner type result for permutations proved by Ellis.
Keywords
Cite
@article{arxiv.2602.11796,
title = {Frankl's diversity theorem for permutations},
author = {Eduard Inozemtsev and Andrey Kupavskii},
journal= {arXiv preprint arXiv:2602.11796},
year = {2026}
}