English

A note on $G$-intersecting families

Combinatorics 2016-05-25 v1

Abstract

Consider a graph GG and a kk-uniform hypergraph H\mathcal{H} on common vertex set [n][n]. We say that H\mathcal{H} is GG-intersecting if for every pair of edges in X,YHX,Y \in \mathcal{H} there are vertices xXx \in X and yYy \in Y such that x=yx = y or xx and yy are joined by an edge in GG. This notion was introduced by Bohman, Frieze, Ruszink\'o and Thoma who proved a natural generalization of the Erd\H{o}s-Ko-Rado Theorem for GG-intersecting kk-uniform hypergraphs for GG sparse and k=O(n1/4)k = O( n^{1/4} ). In this note, we extend this result to k=O(n)k = O\left( \sqrt{n} \right).

Keywords

Cite

@article{arxiv.1605.07241,
  title  = {A note on $G$-intersecting families},
  author = {Tom Bohman and Ryan R. Martin},
  journal= {arXiv preprint arXiv:1605.07241},
  year   = {2016}
}

Comments

6 pages

R2 v1 2026-06-22T14:07:45.773Z