On restricted colorings of $(d,s)$-edge colorable graphs

TL;DR

This paper investigates the structure of $(d,s)$-edge colorable graphs, establishing conditions under which proper edge colorings can avoid specified forbidden colors while maintaining certain cycle properties.

Contribution

It introduces new results on restricted colorings of $(d,s)$-edge colorable graphs, linking cycle structures to the existence of proper colorings avoiding forbidden colors.

Findings

Existence of proper colorings avoiding forbidden lists under sparsity conditions

Characterization of $(d,s)$-edge colorable graphs with cycle constraints

Extension of coloring results to graphs with specific cycle and edge-coloring properties

Abstract

A cycle is $2$-colored if its edges are properly colored by two distinct colors. A $(d,s)$-edge colorable graph $G$ is a $d$-regular graph that admits a proper $d$-edge coloring in which every edge of $G$ is in at least $s-1$ $2$-colored $4$-cycles. Given a $(d,s)$-edge colorable graph $G$ and a list assigment $L$ of forbidden colors for the edges of $G$ satisfying certain sparsity conditions, we prove that there is a proper $d$-edge coloring of $G$ that avoids $L$, that is, a proper edge coloring $\varphi$ of $G$ such that $\varphi(e) \notin L(e)$ for every edge $e$ of $G$.