An expressive temporal logic for real time

  • Authors:
  • Yoram Hirshfeld;Alexander Rabinovich

  • Affiliations:
  • School of Computer Science, Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel;School of Computer Science, Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel

  • Venue:
  • MFCS'06 Proceedings of the 31st international conference on Mathematical Foundations of Computer Science
  • Year:
  • 2006

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Abstract

We add to the standard temporal logic with the modalities ”Until” and ”Since”, a sequence of “counting modalities”: For each n the modality Cn(X), which says that X will be true at least at n points in the next unit of time, and its past counterpart ${\overleftarrow{C}_n}$, which says that X has happened at least n times in the last unit of time. We prove that this temporal logic is as expressive as can be hoped for; all the modalities that can be expressed in a strong natural decidable predicate logic framework, are expressible in this temporal logic.