Coloring and Maximum Weight Independent Set of Rectangles
Coloring and Maximum Weight Independent Set of Rectangles
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独立矩形组的着色和最大重量
DOI:
10.1137/1.9781611976465.54
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发表时间:
2020
期刊:
影响因子:
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通讯作者:
Bartosz Walczak
中科院分区:
文献类型:
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作者:
Parinya Chalermsook;Bartosz Walczak
In 1960, Asplund and Grunbaum proved that every intersection graph of axis-parallel rectangles in the plane admits an $O(\omega^2)$-coloring, where $\omega$ is the maximum size of a clique. We present the first asymptotic improvement over this six-decade-old bound, proving that every such graph is $O(\omega\log\omega)$-colorable and presenting a polynomial-time algorithm that finds such a coloring. This improvement leads to a polynomial-time $O(\log\log n)$-approximation algorithm for the maximum weight independent set problem in axis-parallel rectangles, which improves on the previous approximation ratio of $O(\frac{\log n}{\log\log n})$.