On the logic of theory change: Safe contraction

Studia Logica 44 (4):405 - 422 (1985)
This paper is concerned with formal aspects of the logic of theory change, and in particular with the process of shrinking or contracting a theory to eliminate a proposition. It continues work in the area by the authors and Peter Gärdenfors. The paper defines a notion of safe contraction of a set of propositions, shows that it satisfies the Gärdenfors postulates for contraction and thus can be represented as a partial meet contraction, and studies its properties both in general and under various natural constraints
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DOI 10.1007/BF00370430
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Peter Gärdenfors (1984). Epistemic Importance and Minimal Changes of Belief. Australasian Journal of Philosophy 62 (2):136 – 157.

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