Cycles and paths through vertices whose degrees are at least the bipartite-hole-number
Abstract
The bipartite-hole-number of a graph , denoted by , is the minimum integer such that there exist positive integers and with , satisfying the property that for any two disjoint sets with and , there is at least one edge between and . In 1992, Bollob\'as and Brightwell, and independently Shi, proved that every -connected graph of order contains a cycle passing through all vertices whose degrees are at least . Motivated by their result, we show that in any -connected graph of order , there exists a cycle containing all vertices whose degrees are at least . Moreover, we prove that for any pair of vertices in a connected graph , if their degrees are at least , then there exists a path joining them that contains all vertices whose degrees are at least . The results extend two existing ones.
Cite
@article{arxiv.2506.09750,
title = {Cycles and paths through vertices whose degrees are at least the bipartite-hole-number},
author = {Chengli Li and Feng Liu and Yurui Tang},
journal= {arXiv preprint arXiv:2506.09750},
year = {2025}
}
Comments
arXiv admin note: text overlap with arXiv:2504.04493