System of Spheres-based Multiple Contractions

Journal of Philosophical Logic 41 (1):29-52 (2012)
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.
Keywords Belief change  Theory contraction  Multiple contraction  Possible worlds semantics  System of spheres
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    References found in this work BETA
    André Fuhrmann (1991). Theory Contraction Through Base Contraction. Journal of Philosophical Logic 20 (2):175 - 203.
    André Fuhrmann & Sven Ove Hansson (1994). A Survey of Multiple Contractions. Journal of Logic, Language and Information 3 (1):39-75.

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