2014
DOI: 10.1016/j.tcs.2013.03.010
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Online Sum-Radii Clustering

Abstract: Abstract. In Online Sum-Radii Clustering, n demand points arrive online and must be irrevocably assigned to a cluster upon arrival. The cost of each cluster is the sum of a fixed opening cost and its radius, and the objective is to minimize the total cost of the clusters opened by the algorithm. We show that the deterministic competitive ratio of Online Sum-Radii Clustering for general metric spaces is Θ(log n), where the upper bound follows from a primal-dual algorithm and holds for general metric spaces, and… Show more

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Cited by 6 publications
(3 citation statements)
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“…The problems are complicated by situations where the set of clients may change over time, for example documents in a very large database that must be efficiently searchable and maintained. This then leads to various models: online [14,16], incremental [13], streaming, or dynamic. The dynamic setting, where clients may not only arrive but also depart, has been empirically studied at least since 1993 [12], and is the focus of the present paper, with the joint goals of maintaining clusterings whose objective value is close to optimal, and of updating the cluster quickly after each event.…”
Section: Introductionmentioning
confidence: 99%
“…The problems are complicated by situations where the set of clients may change over time, for example documents in a very large database that must be efficiently searchable and maintained. This then leads to various models: online [14,16], incremental [13], streaming, or dynamic. The dynamic setting, where clients may not only arrive but also depart, has been empirically studied at least since 1993 [12], and is the focus of the present paper, with the joint goals of maintaining clusterings whose objective value is close to optimal, and of updating the cluster quickly after each event.…”
Section: Introductionmentioning
confidence: 99%
“…Finally, the dynamic environments defined for OFL [52]- [54] can be defined for other optimization problems, such as the Dynamic Sum-Radii Clustering in the Online Setting problem [52], [76]. Many of the techniques used there seem to be generic and hence can be applied to solve these dynamic variants.…”
Section: Discussion and Open Problemsmentioning
confidence: 99%
“…Koutris [53] reviewed several results for network leasing problems, and presented a randomized O(K lg n/ lg lg n)-competitive algorithm for the online facility leasing problem. Fotakis and Koutris [32] also proposed the online sum-radii clustering problem, which is related to the parking permit problem.…”
Section: Related Workmentioning
confidence: 99%