Acta Informatica

, Volume 43, Issue 2, pp 73–130 | Cite as

Fairness of Actions in System Computations

  • F. CorradiniEmail author
  • M. R. Di Berardini
  • W. Vogler
Original Article


This paper contrasts two important features of parallel system computations: fairness and timing. The study is carried out at a specification system level by resorting to a well-known process description language. The language is extended with labels which allow to filter out those process executions that are not (weakly) fair [as in Costa and Stirling (Acta Inf. 21:417–441, 1984) and in Costa and Stirling (Inf. Comput. 73:207–244, 1987)], and with upper time bounds for the process activities (as in Corradini et al. Acta Inf. 38:735–792, 2002). We show that fairness and timing are closely related. Two main results are stated. First, we show that each everlasting (or non-Zeno) timed process execution is fair. Second, we provide a characterization for fair executions of untimed processes in terms of timed process executions. This results in a finite representation of fair executions using regular expressions.


Induction Hypothesis Operational Semantic System Computation Operational Rule Execution Sequence 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  1. 1.Dipartimento di Matematica e InformaticaUniversità di CamerinoCamerinoItaly
  2. 2.Institut für InformatikUniversität AugsburgAugsburgGermany

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