A survey of multiple contractions |
| |
Authors: | André Fuhrmann Sven Ove Hansson |
| |
Affiliation: | (1) Department of Philosophy, University of Konstanz, 78 434 Konstanz, Germany;(2) Department of Philosophy, Uppsala University, Villavägen 5, 752 36 Uppsala, Sweden |
| |
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. |
| |
Keywords: | belief revision belief contraction theory change |
本文献已被 SpringerLink 等数据库收录! |
|