Graphs with Chromatic Roots in the Interval $(1,2)$

  • Gordon F. Royle

Abstract

We present an infinite family of 3-connected non-bipartite graphs with chromatic roots in the interval $(1,2)$ thus resolving a conjecture of Jackson's in the negative. In addition, we briefly consider other graph classes that are conjectured to have no chromatic roots in $(1,2)$.

Published
2007-08-31
Article Number
N18