Improved Approximation Algorithms for Metric Facility Location Problems (2002)
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| Venue: | In Proceedings of the 5th International Workshop on Approximation Algorithms for Combinatorial Optimization |
| Citations: | 100 - 11 self |
BibTeX
@INPROCEEDINGS{Mahdian02improvedapproximation,
author = {Mohammad Mahdian and Yinyu Ye and Jiawei Zhang},
title = {Improved Approximation Algorithms for Metric Facility Location Problems},
booktitle = {In Proceedings of the 5th International Workshop on Approximation Algorithms for Combinatorial Optimization},
year = {2002},
pages = {229--242}
}
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Abstract
In this paper we present a 1.52-approximation algorithm for the metric uncapacitated facility location problem, and a 2-approximation algorithm for the metric capacitated facility location problem with soft capacities. Both these algorithms improve the best previously known approximation factor for the corresponding problem, and our soft-capacitated facility location algorithm achieves the integrality gap of the standard LP relaxation of the problem. Furthermore, we will show, using a result of Thorup, that our algorithms can be implemented in quasi-linear time.
