相关论文: Randomized k-server algorithms for growth-rate bou…

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This paper has been withdrawn by the author due to an extended and largely modified version of the paper was published in arXiv (see arXiv:0807.3694, Disjoint minimal graphs).

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This paper is withdrawn. The revised paper appears in chao-dyn/9904020

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The author was informed that the result in the original version had been obtained earlier by K. Ueda (arXiv:math/0503355 [math.AG]). The paper is retracted.

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A modified version of this paper is under process and with a new title and abstract. Hence, this version of the article is completely withdrawn.

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We study the k-median and k-center problems in probabilistic graphs. We analyze the hardness of these problems, and propose several algorithms with improved approximation ratios compared with the existing proposals.

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