Oriented Coloring: Complexity and Approximation

  • Jean-François Culus
  • Marc Demange
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3831)


This paper is devoted to an oriented coloring problem motivated by a task assignment model. A recent result established the NP-completeness of deciding whether a digraph is k-oriented colorable; we extend this result to the classes of bipartite digraphs and circuit-free digraphs. Finally, we investigate the approximation of this problem: both positive and negative results are devised.


Greedy Algorithm Chromatic Number Oriented Graph Information Processing Letter Mixed Graph 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Jean-François Culus
    • 1
  • Marc Demange
    • 2
  1. 1.UTM, équipe Grimm – SMASHToulouseFrance
  2. 2.département SID Avenue Bernard HIRSHESSECCergy PontoiseFrance

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