Safety and Liveness Properties for Real Traces and a Direct Translation from LTL to Monoids

  • Authors:
  • Volker Diekert;Paul Gastin

  • Affiliations:
  • -;-

  • Venue:
  • Formal and Natural Computing - Essays Dedicated to Grzegorz Rozenberg [on occasion of his 60th birthday, March 14, 2002]
  • Year:
  • 2002

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Abstract

For infinite words there are well-known characterizations of safety and liveness properties. We extend these results to real Mazurkiewicz traces. This is possible due to a result, which has been established recently: Every first-order definable real trace language is definable in linear temporal logic using future tense operators, only. We show that the canonical choice for a topological characterization of safety and liveness properties is given by the Scott topology. In this paper we use an algebraic approach where we work with aperiodic monoids. Therefore we also give a direct translation from temporal logic to aperiodic monoids which is of independent interest.