Conservative Retractions of Propositional Logic Theories by Means of Boolean Derivatives: Theoretical Foundations

  • Authors:
  • Gonzalo A. Aranda-Corral;Joaquín Borrego-Díaz;M. Magdalena Fernández-Lebrón

  • Affiliations:
  • Departamento de Ciencias de la Computación e Inteligencia Artificial,;Departamento de Ciencias de la Computación e Inteligencia Artificial,;Departamento de Matemática Aplicada I E.T.S. Ingeniería Informática, Universidad de Sevilla, Sevilla, Spain 41012

  • Venue:
  • Calculemus '09/MKM '09 Proceedings of the 16th Symposium, 8th International Conference. Held as Part of CICM '09 on Intelligent Computer Mathematics
  • Year:
  • 2009

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Abstract

We present a specialised (polynomial-based) rule for the propositional logic called the Independence Rule , which is useful to compute the conservative retractions of propositional logic theories. In this paper we show the soundness and completeness of the logical calculus based on this rule, as well as other applications. The rule is defined by means of a new kind of operator on propositional formulae. It is based on the boolean derivatives on the polynomial ring ${\mathbb F}_2[{\bf x}]$.