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arxiv: 1812.05510 · v1 · pith:PYM54BHLnew · submitted 2018-12-13 · 💻 cs.DM · math.CO

Oriented Colourings of Graphs with Maximum Degree Three and Four

classification 💻 cs.DM math.CO
keywords degreemaximumorientedcolouringfourgraphorientationthree
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We show that any orientation of a graph with maximum degree three has an oriented 9-colouring, and that any orientation of a graph with maximum degree four has an oriented 69-colouring. These results improve the best known upper bounds of 11 and 80, respectively.

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