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SIAM Journal on Computing
Article . 2010 . Peer-reviewed
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Article . 2010
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Article . 2010
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Conference object . 2008
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Adaptive Local Ratio

Authors: Mestre, J.;

Adaptive Local Ratio

Abstract

Local ratio is a well-known paradigm for designing approximation algorithms for combinatorial optimization problems. At a very high level, a local-ratio algorithm first decomposes the input weight function $w$ into a positive linear combination of simpler weight functions or models. Guided by this process, a solution $S$ is constructed such that $S$ is $\alpha$-approximate with respect to each model used in the decomposition. As a result, $S$ is $\alpha$-approximate under $w$ as well. These models usually have a very simple structure that remains “unchanged” throughout the execution of the algorithm. In this work we show that adaptively choosing a model from a richer spectrum of functions can lead to a better local ratio. Indeed, by turning the search for a good model into an optimization problem of its own, we get improved approximations for a data migration problem.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
2
Average
Average
Average
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