Natalia de Castro

collaborators

2 papers

math.CO2016

Gradation in Greyscales of Graphs

Natalia de Castro, María A. Garrido-Vizuete, Rafael Robles +1

In this work we present the notion of greyscale of a graph as a colouring of its vertices that uses colours from the real interval [0,1]. Any greyscale induces another colouring by…

math.CO2016

Contrast in Greyscales of Graphs

Natalia de Castro, María A. Garrido-Vizuete, Rafael Robles +1

A greyscale $f$ of a graph $G (V, E)$ is a mapping from $V$ to the interval $[0, 1]$ such that ${0, 1} \subseteq I m (f)$ . This function $f$ induces another mapping $f$ on $…