Very Well-Covered Graphs with the Erd\H{o}s-Ko-Rado Property
Combinatorics
2023-04-19 v2
Abstract
A family of independent -sets of a graph is an -star if every set in the family contains some fixed vertex . A graph is -EKR if the maximum size of an intersecting family of independent -sets is the size of an -star. Holroyd and Talbot conjecture that a graph is -EKR as long as , where is the minimum size of a maximal independent set. It is suspected that the smallest counterexample to this conjecture is a well-covered graph. Here we consider the class of very well-covered graphs obtained by appending a single pendant edge to each vertex of . We prove that the pendant complete graph is -EKR when and strictly so when . Pendant path graphs are also explored and the vertex whose -star is of maximum size is determined.
Keywords
Cite
@article{arxiv.2106.09067,
title = {Very Well-Covered Graphs with the Erd\H{o}s-Ko-Rado Property},
author = {Jessica De Silva and Adam B. Dionne and Aidan Dunkelberg and Pamela E. Harris},
journal= {arXiv preprint arXiv:2106.09067},
year = {2023}
}
Comments
10 pages