Coloring even-hole-free graphs with no star cutset

05/04/2018

∙

by   Ngoc Khang Le, et al.

∙

0

∙

share

A hole is a chordless cycle of length at least 4. A graph is even-hole-free if it does not contain any hole of even length as an induced subgraph. In this paper, we study the class of even-hole-free graphs with no star cutset. We give the optimal upper bound for its chromatic number in terms of clique number and a polynomial-time algorithm to color any graph in this class. The latter is, in fact, a direct consequence of our proof that this class has bounded rank-width.