On the $\delta$-chromatic numbers of the Cartesian products of graphs

Wipawee Tangjai, Witsarut Pho-on, Panupong Vichitkunakorn

In this work, we study the $\delta$-chromatic number of a graph which is the chromatic number of the $\delta$-complement of a graph. We give a structure of the $\delta$-complements and sharp boun…