A survey of multiple contractions

Journal of Logic, Language and Information 3 (1):39-75 (1994)
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Abstract

The AGM theory of belief contraction is extended tomultiple contraction, i.e. to contraction by a set of sentences rather than by a single sentence. There are two major variants: Inpackage contraction all the sentences must be removed from the belief set, whereas inchoice contraction it is sufficient that at least one of them is removed. Constructions of both types of multiple contraction are offered and axiomatically characterized. Neither package nor choice contraction can in general be reduced to contractions by single sentences; in the finite case choice contraction allows for reduction.

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Author Profiles

Sven Ove Hansson
Royal Institute of Technology, Stockholm
André Fuhrmann
Goethe University Frankfurt

Citations of this work

The Ethics of Nudge.Luc Bovens - 2008 - In Mats J. Hansson & Till Grüne-Yanoff (eds.), Preference Change: Approaches from Philosophy, Economics and Psychology. Berlin: Springer, Theory and Decision Library A. pp. 207-20.
Logic of belief revision.Sven Ove Hansson - 2008 - Stanford Encyclopedia of Philosophy.
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