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A sound and complete R-calculi with respect to contraction and minimal change

  • Wei Li*
  • , Yuefei Sui
  • *Corresponding author for this work
  • CAS - Institute of Computing Technology

Research output: Contribution to journalArticlepeer-review

Abstract

AGM postulates are for belief revision (revision by a single belief), and DP postulates are for iterated revision (revision by a finite sequence of beliefs). R-calculus is given for R-configurations Δ{pipe}Γ, where Δ is a set of atomic formulas or the negations of atomic formulas, and Γ is a finite set of formulas. We shall give two R-calculi C and M (sets of deduction rules) such that for any finite consistent sets Γ, Δ of formulas in the propositional logic, there is a consistent set Θ ⊆ Γ of formulas such that Δ{pipe}Γ {long rightwards double arrow} Δ, Θ is provable and Θ is a contraction of Γ by Δ or a minimal change of Γ by Δ; and prove that C and M are sound and complete with respect to the contraction and the minimal change, respectively.

Original languageEnglish
Pages (from-to)184-191
Number of pages8
JournalFrontiers of Computer Science
Volume8
Issue number2
DOIs
StatePublished - Apr 2014

Keywords

  • R-calculus
  • belief revision
  • contraction
  • minimal change

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