Clique coloring of dense random graphs

Noga Alon, Michael Krivelevich

Published 2016-12-20Version 1

The clique chromatic number of a graph G=(V,E) is the minimum number of colors in a vertex coloring so that no maximal (with respect to containment) clique is monochromatic. We prove that the clique chromatic number of the binomial random graph G=G(n,1/2) is, with high probability, \Omega(log n). This settles a problem of McDiarmid, Mitsche and Pralat who proved that it is O(log n) with high probability.