English

The list chromatic index of simple graphs whose odd cycles intersect in at most one edge

Combinatorics 2017-11-21 v6

Abstract

We study the class of simple graphs G\mathcal{G}^* for which every pair of distinct odd cycles intersect in at most one edge. We give a structural characterization of the graphs in G\mathcal{G}^* and prove that every GGG \in \mathcal{G}^* satisfies the list-edge-coloring conjecture. When Δ(G)4\Delta(G) \geq 4, we in fact prove a stronger result about kernel-perfect orientations in L(G)L(G) which implies that GG is (mΔ(G):m)(m\Delta(G):m)-edge-choosable and Δ(G)\Delta(G)-edge-paintable for every m1m \geq 1.

Keywords

Cite

@article{arxiv.1507.05933,
  title  = {The list chromatic index of simple graphs whose odd cycles intersect in at most one edge},
  author = {Jessica McDonald and Gregory J. Puleo},
  journal= {arXiv preprint arXiv:1507.05933},
  year   = {2017}
}

Comments

15 pages, 8 figures. Minor fixes throughout the paper