### Some articles on *operators, revision, revision operator, operator*:

Belief Revision - Contraction

... The

... The

**operators**of**revision**and contractions are related by the Levi and Harper identities Eight postulates have been defined for contraction ... Whenever a**revision operator**satisfies the eight postulates for**revision**, its corresponding contraction**operator**satisfies the eight postulates for contraction, and vice versa ... If a contraction**operator**satisfies at least the first six postulates for contraction, translating it into a**revision operator**and then back into a ...Belief Revision - Conditions Equivalent To The AGM Postulates

... The AGM postulates are equivalent to several different conditions on the

... The AGM postulates are equivalent to several different conditions on the

**revision operator**in particular, they are equivalent to the**revision operator**... Each**revision operator**satisfying the AGM postulates is associated to a set of preference relations, one for each possible belief base, such that the models of are exactly the minimal of all ... The**revision operator**and its associated family of orderings are related by the fact that is the set of formulae whose set of models contains all the minimal models of ...Main Site Subjects

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