Discussiones Mathematicae Graph Theory 31(4) (2011) 675-686
doi: 10.7151/dmgt.1572

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Oriented colouring of some graph products

N.R. Aravind

The Institute of Mathematical Sciences
Taramani, Chennai, India

N. Narayanan

C R RAO Advanced Institute for Mathematics
Statistics and Computer Science
University of Hyderabad Campus, Hyderabad, India

C.R. Subramanian

The Institute of Mathematical Sciences
Taramani, Chennai, India

Abstract

We obtain some improved upper and lower bounds on the oriented chromatic number for different classes of products of graphs.

Keywords: oriented colouring

2010 Mathematics Subject Classification: 05C15, 05C20.

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Received 5 March 2010
Revised 11 October 2010
Accepted 11 October 2010