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https://doi.org/10.7151/dmgt

Discussiones Mathematicae Graph Theory

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Discussiones Mathematicae Graph Theory

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Discussiones Mathematicae Graph Theory  17(1) (1997)   127-132
DOI: https://doi.org/10.7151/dmgt.1045

ON GENERALIZED LIST COLOURINGS OF GRAPHS

Mieczysław Borowiecki

Institute of Mathematics
Technical University of Zielona Góra
Podgórna 50, 65-246 Zielona Góra, Poland
e-mail: m.borowiecki@im.uz.zgora.pl

Izak Broere

Department of Mathematics
Rand Afrikaans University
P.O. Box 524, Auckland Park, 2006 South Africa
e-mail: ib@rau3.rau.ac.za

Peter Mihók

Mathematical Institute of Slovak Academy of Sciences
Grešákova 6, 040 01 Košice, Slovakia
e-mail: mihok@Košice.upjs.sk

Abstract

Vizing [15] and Erdős et al. [8] independently introduce the idea of considering list-colouring and k-choosability. In the both papers the choosability version of Brooks' theorem [4] was proved but the choosability version of Gallai's theorem [9] was proved independently by Thomassen [14] and by Kostochka et al. [11]. In [3] some extensions of these two basic theorems to (P,k)-choosability have been proved.

In this paper we prove some extensions of the well-known bounds for the P-chromatic number to the (P,k)-choice number and then an extension of Brooks' theorem.

Keywords: hereditary property of graphs, list colouring, vertex partition number.

1991 Mathematics Subject Classification: 05C15, 05C70.

References

[1] M. Borowiecki, I. Broere, M. Frick, P. Mihók and G. Semanišin, A survey of hereditary properties of graphs, Discussiones Mathematicae Graph Theory 17 (1997) 5-50, doi: 10.7151/dmgt.1037.
[2] M. Borowiecki and P. Mihók, Hereditary Properties of Graphs, in: Advances in Graph Theory (Vishwa International Publications, 1991) 41-68.
[3] M. Borowiecki, E. Drgas-Burchardt, Generalized list colourings of graphs, Discussiones Math. Graph Theory 15 (1995) 185-193, doi: 10.7151/dmgt.1016.
[4] R.L. Brooks, On colouring the nodes of a network, Proc. Cambridge Phil. Soc. 37 (1941) 194-197, doi: 10.1017/S030500410002168X.
[5] G. Chartrand and H.H. Kronk, The point arboricity of planar graphs, J. London Math. Soc. 44 (1969) 612-616, doi: 10.1112/jlms/s1-44.1.612.
[6] G. Chartrand and L. Lesniak, Graphs and Digraphs, Second Edition, (Wadsworth & Brooks/Cole, Monterey, 1986).
[7] G. Dirac, A property of 4-chromatic graphs and remarks on critical graphs, J. London Math. Soc. 27 (1952) 85-92, doi: 10.1112/jlms/s1-27.1.85.
[8] P. Erdős, A.L. Rubin and H. Taylor, Choosability in graphs, in: Proc. West Coast Conf. on Combin., Graph Theory and Computing, Congressus Numerantium XXVI (1979) 125-157.
[9] T. Gallai, Kritiche Graphen I, Publ. Math. Inst. Hung. Acad. Sci. 8 (1963) 373-395.
[10] T.R. Jensen and B. Toft, Graph Colouring Problems, (Wiley-Interscience Publications, New York, 1995).
[11] A.V. Kostochka, M. Stiebitz and B. Wirth, The colour theorems of Brooks and Gallai extended, Discrete Math. 162 (1996) 299-303, doi: 10.1016/0012-365X(95)00294-7.
[12] P. Mihók, An extension of Brooks' theorem, in: Proc. Fourth Czechoslovak Symp. on Combin., Combinatorics, Graphs, Complexity (Prague, 1991) 235-236.
[13] S.K. Stein, B-sets and planar graphs, Pacific J. Math. 37 (1971) 217-224.
[14] C. Thomassen, Color-critical graphs on a fixed surface (Report, Technical University of Denmark, Lyngby, 1995).
[15] V.G. Vizing, Colouring the vertices of a graph in prescribed colours, Diskret. Analiz 29 (1976) 3-10 (in Russian).

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