Star coloring high girth planar graphs
The electronic journal of combinatorics, Tome 15 (2008)
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A star coloring of a graph is a proper coloring such that no path on four vertices is 2-colored. We prove that every planar graph with girth at least 9 can be star colored using 5 colors, and that every planar graph with girth at least 14 can be star colored using 4 colors; the figure 4 is best possible. We give an example of a girth 7 planar graph that requires 5 colors to star color.
Craig Timmons. Star coloring high girth planar graphs. The electronic journal of combinatorics, Tome 15 (2008). doi: 10.37236/848
@article{10_37236_848,
author = {Craig Timmons},
title = {Star coloring high girth planar graphs},
journal = {The electronic journal of combinatorics},
year = {2008},
volume = {15},
doi = {10.37236/848},
zbl = {1165.05326},
url = {http://geodesic.mathdoc.fr/articles/10.37236/848/}
}
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