A linear time approximation scheme for computing geometric maximum k-star

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Facility dispersion seeks to locate the facilities as far away from each other as possible, which has attracted a multitude of research attention recently due to the pressing need on dispersing facilities in various scenarios. In this paper, as a facility dispersion problem, the geometric maximum k-star problem is considered. Given a set P of n points in the Euclidean plane, a k-star is defined as selecting k points from P and linking k - 1 points to the center point. The maximum k-star problem asks to compute a k-star on P with the maximum total length over its k - 1 edges. A linear time approximation scheme is proposed for this problem. It approximates the maximum k-star within a factor of (1+ ∩) O(n+1/4 log 1)time for any > 0. To the best of the authors' knowledge, this work presents the first linear time approximation scheme on the facility dispersion problems. © 2012 Springer Science+Business Media, LLC.

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Journal of Global Optimization