Centralized and decentralized rumor blocking problems

Xin Chen, Qingqin Nong, Yanwei Feng, Yongchang Cao, Suning Gong, Qizhi Fang, Ker-I Ko

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


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 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.
Original languageEnglish
Pages (from-to)314-329
Number of pages16
JournalJournal of Combinatorial Optimization
Issue number1
StatePublished - Jul 2017


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