Until-Since Temporal Logic Based on Parallel Time with Common Past. Deciding Algorithms

  • Authors:
  • V. Rybakov

  • Affiliations:
  • Department of Computing and Mathematics, Manchester Metropolitan University, John Dalton Building, Chester Street, Manchester M1 5GD, U.K.

  • Venue:
  • LFCS '07 Proceedings of the international symposium on Logical Foundations of Computer Science
  • Year:
  • 2007

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Abstract

We present a framework for constructing algorithms recognizing admissible inference rules (consecutions) in temporal logics with Until and Since based on Kripke/Hintikka structures modeling parallel time with common past. Logics $\mathcal{PTL}_\alpha$ with various branching factor $\alpha\in {\mathcal N} \cup \{\omega\}$ after common past are considered. The offered technique looks rather flexible, for instance, with similar approach we showed [33] that temporal logic based on sheafs of integer numbers with common origin is decidable by admissibility. In this paper we extend obtained algorithms to logics $\mathcal{PTL}_\alpha$. We prove that any logic $\mathcal{PTL}_\alpha$ is decidable w.r.t. admissible consecutions (inference rules), as a consequence, we solve satisfiability problem and show that any $\mathcal{PTL}_\alpha$ itself is decidable.