A near-linear constant-factor approximation for euclidean bipartite matching?
A near-linear constant-factor approximation for euclidean bipartite matching?
复制标题
欧氏二分匹配的近线性常数因子近似?
DOI:
10.1145/997817.997856
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发表时间:
2004
期刊:
影响因子:
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通讯作者:
Kasturi R. Varadarajan
中科院分区:
文献类型:
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作者:
P. Agarwal;Kasturi R. Varadarajan
In the Euclidean bipartite matching problem, we are given a set <i>R</i> of "red" points and a set <i>B</i> of "blue" points in ℝ<sup>3</sup> where |<i>R</i>| = |<i>B</i>| = <i>n</i>, and we want to pair up each red point with a distinct blue point so that the sum of distances between the paired points is minimized. We present an approximation algorithm that given any parameter 0 < <i>ε</i> < 1 runs in <i>O</i>(<i>n</i><sup>1+ε</sup>) expected time and returns a matching whose expected cost is within a multiplicative factor <i>O</i>(log (1/<i>ε</i>)) of the optimal. The dimension <i>d</i> is considered to be a fixed constant.