Paramodulation with Non-Monotonic Orderings and Simplification

  • Authors:
  • Miquel Bofill;Albert Rubio

  • Affiliations:
  • Dept. Informàtica i Matemàtica Aplicada, Universitat de Girona, Girona, Spain 17071;Dept. Llenguatges i Sistemes Informàtics, Universitat Politècnica de Catalunya, Barcelona, Spain 08034

  • Venue:
  • Journal of Automated Reasoning
  • Year:
  • 2013

Quantified Score

Hi-index 0.00

Visualization

Abstract

Ordered paramodulation and Knuth-Bendix completion are known to remain complete when using non-monotonic orderings. However, these results do not imply the compatibility of the calculus with essential redundancy elimination techniques such as demodulation, i.e., simplification by rewriting, which constitute the primary mode of computation in most successful automated theorem provers. In this paper we present a complete ordered paramodulation calculus for non-monotonic orderings which is compatible with powerful redundancy notions including demodulation, hence strictly improving the previous results and making the calculus more likely to be used in practice. As a side effect, we obtain a Knuth-Bendix completion procedure compatible with simplification techniques, which can be used for finding, whenever it exists, a convergent term rewrite system for a given set of equations and a (possibly non-totalizable) reduction ordering.