Clausal resolution for normal modal logics

  • Authors:
  • Cláudia Nalon;Clare Dixon

  • Affiliations:
  • Departamento de Ciência da Computação, Universidade de Brasília, Caixa Postal 4466, CEP:70.910-090, Brasília, DF, Brazil;Department of Computer Science, University of Liverpool, Liverpool, L69 3BX, United Kingdom

  • Venue:
  • Journal of Algorithms
  • Year:
  • 2007

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Abstract

We present a clausal resolution-based method for normal modal logics. Differently from other approaches, where inference rules are based on the syntax of a particular set of axioms, we focus on the restrictions imposed on the binary accessibility relation for each particular normal logic. We provide soundness and completeness results for all fifteen families of multi-modal normal logics whose accessibility relations have the property of being non-restricted, reflexive, serial, transitive, Euclidean, or symmetric.