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Erschienen in: Journal of Combinatorial Optimization 1/2017

17.08.2016

Centralized and decentralized rumor blocking problems

verfasst von: Xin Chen, Qingqin Nong, Yan Feng, Yongchang Cao, Suning Gong, Qizhi Fang, Ker-I Ko

Erschienen in: Journal of Combinatorial Optimization | Ausgabe 1/2017

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Abstract

This paper consists of two parts. In the first part, we study a centralized rumor blocking problem with a novel social objective function different from those in the literature. We will show that this objective function is non-decreasing and submodular and hence corresponding rumor blocking problem has a greedy approximation with objective function value at least \(1-1/e\) of the optimal. In the second part, we study a decentralized rumor blocking problem with two selfish protectors, which falls into a 2-player non-cooperate game model. We will show that this game is a basic valid utility system and hence the social utility of any Nash equilibrium in the game is at least a half of the optimal social utility.

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Metadaten
Titel
Centralized and decentralized rumor blocking problems
verfasst von
Xin Chen
Qingqin Nong
Yan Feng
Yongchang Cao
Suning Gong
Qizhi Fang
Ker-I Ko
Publikationsdatum
17.08.2016
Verlag
Springer US
Erschienen in
Journal of Combinatorial Optimization / Ausgabe 1/2017
Print ISSN: 1382-6905
Elektronische ISSN: 1573-2886
DOI
https://doi.org/10.1007/s10878-016-0067-z

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