2 papers
math.CO2013
A characterization of triangulations of closed surfaces
Jorge Arocha, Javier Bracho, Natalia Garcia-Colin +1
In this paper we prove that a finite triangulation of a connected closed surface is completely determined by its intersection matrix. The \emph{intersection matrix} of a finite tri…
math.CO2012
Null and non--rainbow colorings of projective plane and sphere triangulations
Jorge L. Arocha, Amanda Montejano
For maximal planar graphs of order , we prove that a vertex--coloring containing no rainbow faces uses at most colors, and this is best poss…