Grünbaum colorings of toroidal triangulations
Michael O. Albertson, Hannah Alpert, sarah‐marie belcastro, Ruth Haas · Journal of Graph Theory · 2009
Abstract We prove that if G is a triangulation of the torus and χ(G)≠5, then there is a 3‐coloring of the edges of G so that the edges bounding every face are assigned three different colors. © 2009 Wiley Periodicals, Inc. J Graph Theory 63: 68–81, 2010