Improper colouring of weighted grid and hexagonal graphs - Archive ouverte HAL Access content directly
Journal Articles Discrete Mathematics, Algorithms and Applications Year : 2010

Improper colouring of weighted grid and hexagonal graphs

(1) , (1) , (2) , (3)


We study a weighted improper colouring problem motivated by a frequency allocation problem. It consists of associating to each vertex a set of p(v) (weight) distinct colours (frequencies), such that the set of vertices having a given colour induces a graph of degree at most k (the case k = 0 corresponds to a proper coloring). The objective is to minimize the number of colors. We propose approximation algorithms to compute such colouring for general graphs. We apply these to obtain good approximation ratio for grid and hexagonal graphs. Furthermore we give exact results for the 2-dimensional grid and the triangular lattice when the weights are all the same.
Fichier principal
Vignette du fichier
weight-finalrev2.pdf (219.03 Ko) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

inria-00526530 , version 1 (14-10-2010)



Jean-Claude Bermond, Frédéric Havet, Florian Huc, Claudia Linhares Sales. Improper colouring of weighted grid and hexagonal graphs. Discrete Mathematics, Algorithms and Applications, 2010, 2 (3), pp.395-411. ⟨10.1142/S1793830910000747⟩. ⟨inria-00526530⟩
150 View
85 Download



Gmail Facebook Twitter LinkedIn More