Francis Guthrie's approach to The Four Color Problem

Abstract

The odd wheel is the only type of 4-critical graph in which one vertex always gets a unique color. This supports Frederic Guthrie's approach to the Four Color Problem.

arXiv comment4 pages, 9 figures

References in corpus (2)

• Color identical pairs in 4-chromatic graphs
• Color fixation and color identity in 4-chromatic graphs