On the Chromatic Number of the Visibility Graph of a Set of Points in the Plane
On the Chromatic Number of the Visibility Graph of a Set of Points in the Plane
复制标题
关于平面上点集可见图的色数
DOI:
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发表时间:
2005
影响因子:
0.8
通讯作者:
D. Wood
中科院分区:
文献类型:
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作者:
Jan Kára;A. Pór;D. Wood
AbstractThe visibility graph V(P) of a point set P subseteq R2 has vertex set P, such that two points v,w ∈ P are adjacent whenever there is no other point
in P on the line segment between v and w. We study the chromatic number of
V(P). We characterise the 2- and 3-chromatic visibility graphs. It is an open
problem whether the chromatic number of a visibility graph is bounded by its clique
number. Our main result is a super-polynomial lower bound on the chromatic number
(in terms of the clique number).