Flip colouring of graphs II
Combinatorics
2025-11-05 v3
Abstract
We give results concerning two problems on the recently introduced \textit{flip colourings of graphs}. For positive integers with , we say that a regular graph is a -\textit{flip graph} if there exists a red/blue edge colouring such that the red degree of every vertex is , the blue degree of every vertex is , yet in the closed neighbourhood of every vertex there are more blue edges than red edges. We prove that for integers with , small constructions of -flip graphs on vertices are possible. Furthermore, we prove that there exist -flip sequences where , such that can be arbitrarily large whilst is constant for .
Keywords
Cite
@article{arxiv.2401.02315,
title = {Flip colouring of graphs II},
author = {Xandru Mifsud},
journal= {arXiv preprint arXiv:2401.02315},
year = {2025}
}
Comments
15 pages, 6 figures. Final journal version; to appear in BICA