The circular altitude of a graph
John Bamberg, Brian P. Corr, Alice Devillers, Daniel R. Hawtin, Irene Pivotto, Eric Swartz · arXiv (Cornell University) · 2016
In this paper we investigate a parameter of graphs, called the circular altitude, introduced by Peter Cameron. We show that the circular altitude provides a lower bound on the circular chromatic number, and hence on the chromatic number, of a graph and investigate this parameter for the iterated Mycielskian of certain graphs.