
doi: 10.1137/060664124
arXiv: cs/0607008
A plane graph is l-facially k-colourable if its vertices can be coloured with k colours such that any two distinct vertices on a facial segment of length at most l are coloured differently. We prove that every plane graph is 3-facially 11-colourable. As a consequence, we derive that every 2-connected plane graph with maximum face-size at most 7 is cyclically 11-colourable. These two bounds are for one off from those that are proposed by the (3l+1)-Conjecture and the Cyclic Conjecture.
[INFO.INFO-DM] Computer Science [cs]/Discrete Mathematics [cs.DM], facial colouring, cyclic colouring, planar graphs, Computer Science - Discrete Mathematics
[INFO.INFO-DM] Computer Science [cs]/Discrete Mathematics [cs.DM], facial colouring, cyclic colouring, planar graphs, Computer Science - Discrete Mathematics
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