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On the convergence of the Hegselmann-Krause system

Author(s): Bhattacharyya, A; Braverman, Mark; Chazelle, Bernard; Nguyen, HL

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Abstract: We study convergence of the following discrete-time non-linear dynamical system: n agents are located in ℝd and at every time step, each moves synchronously to the average location of all agents within a unit distance of it. This popularly studied system was introduced by Krause to model the dynamics of opinion formation and is often referred to as the Hegselmann-Krause model. We prove the first polynomial time bound for the convergence of this system in arbitrary dimensions. This improves on the bound of nO(n) resulting from a more general theorem of Chazelle [4]. Also, we show a quadratic lower bound and improve the upper bound for one-dimensional systems to O(n 3)
Publication Date: 9-Jan-2013
Citation: Bhattacharyya, A, Braverman, M, Chazelle, B, Nguyen, HL. (2013). On the convergence of the Hegselmann-Krause system. 61 - 65. doi:10.1145/2422436.2422446
DOI: doi:10.1145/2422436.2422446
Pages: 61 - 65
Type of Material: Conference Article
Journal/Proceeding Title: ITCS 2013 - Proceedings of the 2013 ACM Conference on Innovations in Theoretical Computer Science
Version: Author's manuscript

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