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arXiv 1205.1900cs.DScs.DM
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区间的强无着色

Strong Conflict-Free Coloring of Intervals

Luisa Gargano, Adele A. Rescigno

摘要:

我们考虑直线上的一组点关于一族区间的k-强无冲突着色:直线上的每个点必须被赋予一种颜色,使得着色必须是无冲突的,在这个意义上,在每个区间I中至少有k种颜色,每种颜色在I中只出现一次。在本文中,我们提出了一个多项式算法的一般问题,该算法有一个近似因子5-2/k时,k \geq 2和近似因子2,k=1。在特殊情况下,家庭包含所有可能的区间上的给定的一组点,我们表明,2近似算法存在,任何k \geq 1。

英文摘要:

We consider the k-strong conflict-free coloring of a set of points on a line with respect to a family of intervals: Each point on the line must be assigned a color so that the coloring has to be conflict-free, in the sense that in every interval I there are at least k colors each appearing exactly once in I. In this paper, we present a polynomial algorithm for the general problem; the algorithm has an approximation factor 5-2/k when k\geq2 and approximation factor 2 for k=1. In the special case the family contains all the possible intervals on the given set of points, we show that a 2 approximation algorithm exists, for any k\geq1.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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