Quantales and temporal logics

  • Authors:
  • Bernhard Möller;Peter Höfner;Georg Struth

  • Affiliations:
  • Institut für Informatik, Universität Augsburg, Augsburg, Germany;Institut für Informatik, Universität Augsburg, Augsburg, Germany;Department of Computer Science, University of Sheffield, Sheffield, UK

  • Venue:
  • AMAST'06 Proceedings of the 11th international conference on Algebraic Methodology and Software Technology
  • Year:
  • 2006

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Abstract

We propose an algebraic semantics for the temporal logic CTL* and simplify it for its sublogics CTL and LTL. We abstractly represent state and path formulas over transition systems in Boolean left quantales. These are complete lattices with a multiplication that preserves arbitrary joins in its left argument and is isotone in its right argument. Over these quantales, the semantics of CTL* formulas can be encoded via finite and infinite iteration operators; the CTL and LTL operators can be related to domain operators. This yields interesting new connections between representations as known from the modal μ-calculus and Kleene/ω-algebra.