The square of every subcubic planar graph without 4-cycles and 5-cycles is 7-choosable
Combinatorics
2025-07-02 v1
Abstract
The square of a graph , denoted by , has the same vertex set as and has an edge between two vertices if the distance between them in is at most . Thomassen (2018) and independently, Hartke, Jahanbekam and Thomas (2016) proved that if is a subcubic planar graph. A natural question is whether or not if is a subcubic planar graph. Recently, Kim and Lian (2024) proved that if is a subcubic planar graph of girth at least 6. In this paper, we prove that if is a subcubic planar graph without 4-cycles and 5-cycles, which improves the result of Kim and Lian.
Cite
@article{arxiv.2507.00426,
title = {The square of every subcubic planar graph without 4-cycles and 5-cycles is 7-choosable},
author = {Ligang Jin and Yingli Kang and Seog-Jin Kim},
journal= {arXiv preprint arXiv:2507.00426},
year = {2025}
}
Comments
10 pages