A note on the line‐distinguishing chromatic number and the chromatic index of a graph
Norma Zagaglia Salvi · Journal of Graph Theory · 1993
Abstract Let λ(G) be the line‐distinguishing chromatic number and x′(G) the chromatic index of a graph G. We prove the relation λ(G) ≥ x′(G), conjectured by Harary and Plantholt. © 1993 John Wiley & Sons, Inc.