Plane Graphs without 4- and 5-Cycles and without Ext-Triangular 7-Cycles are 3-Colorable

Ligang Jin, Ying-li Kang, Michael Schubert, Yingqian Wang. Plane Graphs without 4- and 5-Cycles and without Ext-Triangular 7-Cycles are 3-Colorable. SIAM J. Discrete Math., 31(3):1836-1847, 2017. [doi]

Abstract

Abstract is missing.