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The AGM postulates are for the belief revision (revision by a single belief), and the DP postulates for the iterated revision (revision by a finite sequence of beliefs). Li gave an R-calculus for R-configurations Δ|Γ, where Δ is a set of atomic formulas or the negations of atomic formulas, and Γ is a finite set of formulas. In this paper, two deduction systems for the revision of a theory by another...
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