Abstract
In this paper we introduce the notion of Σ-colouring of a graph G: For given subsets Σ(v) of neighbours of v, for every v∈V (G), this is a proper colouring of the vertices of G such that, in addition, vertices that appear together in some Σ(v) receive different colours. This concept generalises the notion of colouring the square of graphs and of cyclic colouring of graphs embedded in a surface. We prove a general result for graphs embeddable in a fixed surface, which implies asymptotic versions of Wegner’s and Borodin’s Conjecture on the planar version of these two colourings. Using a recent approach of Havet et al., we reduce the problem to edge-colouring of multigraphs, and then use Kahn’s result that the list chromatic index is close to the fractional chromatic index.
Our results are based on a strong structural lemma for graphs embeddable in a fixed surface, which also implies that the size of a clique in the square of a graph of maximum degree Δ embeddable in some fixed surface is at most \( \frac{3} {2}\Delta \) plus a constant.
Similar content being viewed by others
References
G. Agnarsson and M. M. Halldórsson: Coloring powers of planar graphs, SIAM J. Discrete Math. 16 (2003), 651–662.
J. A. Bondy and U. S. R. Murty: Graph Theory, Grad. Texts in Math. 244, Springer-Verlag, New York, 2008.
O. V. Borodin: Solution of the Ringel problem on vertex-face coloring of planar graphs and coloring of 1-planar graphs (in Russian), Metody Diskret. Analyz. 41 (1984), 12–26.
O. V. Borodin, H. J. Broersma, A. Glebov and J. van den Heuvel: Minimal degrees and chromatic numbers of squares of planar graphs (in Russian), Diskretn. Anal. Issled. Oper. Ser. 1 8, no. 4 (2001), 9–33.
O. V. Borodin, H. J. Broersma, A. Glebov and J. van den Heuvel: A new upper bound on the cyclic chromatic number, J. Graph Theory 54 (2007), 58–72.
O. V. Borodin, D. P. Sanders and Y. Zhao: On cyclic colorings and their generalizations, Discrete Math. 203 (1999), 23–40.
N. Cohen and J. van den Heuvel: An exact bound on the clique number of the square of a planar graph, in preparation.
R. Diestel: Graph Theory, Grad. Texts in Math. 173, Springer-Verlag, Berlin, 2005.
J. Edmonds: Maximum matching and a polyhedron with 0;1-vertices, J. Res. Nat. Bur. Standards Sect. B 69B (1965), 125–130.
F. Havet, J. van den Heuvel, C. McDiarmid and B. Reed: List colouring squares of planar graphs, Preprint (2008), arxiv.org/abs/0807.3233.
P. Hell and K. Seyffarth: Largest planar graphs of diameter two and fixed maximum degree, Discrete Math. 111 (1993), 313–322.
T. J. Hetherington and D. R. Woodall: List-colouring the square of a K4-minorfree graph, Discrete Math. 308 (2008), 4037–4043.
J. van den Heuvel and S. McGuinness: Coloring the square of a planar graph, J. Graph Theory 42 (2003), 110–124.
T. R. Jensen and B. Toft: Graph Coloring Problems, John-Wiley & Sons, New York, 1995.
T. K. Jonas: Graph coloring analogues with a condition at distance two: L(2; 1)-labelings and list λ-labelings, Ph.D. Thesis, University of South Carolina, 1993.
J. Kahn: Asymptotics of the chromatic index for multigraphs, J. Combin. Theory Ser. B 68 (1996), 233–254.
J. Kahn: Asymptotics of the list-chromatic index for multigraphs, Random Structures Algorithms 17 (2000), 117–156.
J. Kahn and P. M. Kayll: On the stochastic independence properties of hard-core distributions Combinatorica 17 (1997), 369–391.
A. V. Kostochka and D. R. Woodall: Choosability conjectures and multicircuits, Discrete Math. 240 (2001), 123–143.
C. W. Lee: Some recent results on convex polytopes, in: J. C. Lagarias and M. J. Todd, eds., Mathematical Developments Arising from Linear Programming, Contemp. Math. 114 (1990), 3–19.
K.-W. Lih, W. F. Wang and X. Zhu: Coloring the square of a K4-minor free graph, Discrete Math. 269 (2003), 303–309.
W. Mader: Homomorphiesätze für Graphen, Math. Ann. 178 (1968), 154–168.
B. Mohar and C. Thomassen: Graphs on Surfaces, Johns Hopkins University Press, Baltimore, 2001.
M. Molloy and B. Reed: Graph Colouring and the Probabilistic Method, Algorithms Combin. 23, Springer-Verlag, Berlin, 2002.
M. Molloy and M. R. Salavatipour: A bound on the chromatic number of the square of a planar graph, J. Combin. Theory Ser. B 94 (2005), 189–213.
O. Ore and M. D. Plummer: Cyclic coloration of plane graphs, in: Recent Progress in Combinatorics; Proceedings of the Third Waterloo Conference on Combinatorics, Academic Press, San Diego (1969) 287–293.
Y. Rabinovich, A. Sinclair and A. Wigderson: Quadratic dynamical systems, in: Proceedings of the 33rd Annual Conference on Foundations of Computer Science (FOCS), (1992), 304–313.
N. Robertson and P. Seymour: Graph minors XVI. Excluding a non-planar graph, J. Combin. Theory Ser. B 81 (2003), 43–76.
D. P. Sanders and Y. Zhao: A new bound on the cyclic chromatic number, J. Combin. Theory Ser. B 83 (2001), 102–111.
A. Schrijver: Combinatorial Optimization; Polyhedra and Efficiency, Algorithms Combin. 24, Springer-Verlag, Berlin, 2003.
C. E. Shannon: A theorem on colouring lines of a network, J. Math. Physics 28 (1949), 148–151.
V. G. Vizing: On an estimate of the chromatic class of a p-graph (in Russian), Metody Diskret. Analiz. 3 (1964), 25–30.
G. Wegner: Graphs with given diameter and a coloring problem, Technical Report, University of Dortmund, 1977.
S. A. Wong: Colouring graphs with respect to distance, M.Sc. Thesis, Department of Combinatorics and Optimization, University of Waterloo, 1996.
Author information
Authors and Affiliations
Corresponding author
Additional information
This paper benefited greatly from helpful comments of anonymous referees. The authors would like to thank the referees for careful reading of the paper and for their constructive suggestions.
The research for this paper was started during a visit of LE and JvdH to the Mascotte research group at INRIA Sophia-Antipolis, where OA was a PhD student (joint with École Polytechnique). The authors like to thank the members of Mascotte for their hospitality.
JvdH’s visit to INRIA Sophia-Antipolis was partly supported by a grant from the Alliance Programme of the British Council.
Part of this research has been conducted while OA was visiting McGill University in Montreal. He warmly thanks Bruce Reed for providing the possibility for such a visit.
Rights and permissions
About this article
Cite this article
Amini, O., Esperet, L. & Van Den Heuvel, J. A unified approach to distance-two colouring of graphs on surfaces. Combinatorica 33, 253–296 (2013). https://doi.org/10.1007/s00493-013-2573-2
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00493-013-2573-2