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System of Spheres-based Multiple Contractions

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Abstract

We propose a new class of multiple contraction operations — the system of spheres-based multiple contractions — which are a generalization of Grove’s system of spheres-based (singleton) contractions to the case of contractions by (possibly non-singleton) sets of sentences. Furthermore, we show that this new class of functions is a subclass of the class of the partial meet multiple contractions.

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Correspondence to Eduardo Fermé.

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M. D. L. Reis was supported by Fundação para a Ciência e a Tecnologia (FCT) through the grant SFRH/BD/30175/2006 financed by national funds from Ministério da Ciência, Tecnologia e Ensino Superior (MCTES) from Portugal.

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Fermé, E., Reis, M.D.L. System of Spheres-based Multiple Contractions. J Philos Logic 41, 29–52 (2012). https://doi.org/10.1007/s10992-011-9197-z

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  • DOI: https://doi.org/10.1007/s10992-011-9197-z

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