Three semantics of the output operation for generative communication

  • Nadia Busi
  • Roberto Gorrieri
  • Gianluigi Zavattaro
Regular Papers
Part of the Lecture Notes in Computer Science book series (LNCS, volume 1282)


A simple, yet Turing powerful, calculus based on generative communication is introduced; among its primitives, it contains a conditional input operation that tests for presence (or absence) of an output, reminiscent of the inp predicate of Linda. We study three different operational semantics for the output operation, called instantaneous, ordered and unordered. The associated behavioural semantics are obtained as the coarsest congruence contained in the corresponding strong barbed semantics. We prove that when the output operation is instantaneous, the obtained semantics is a sort of asynchronous bisimulation; on the contrary, for the ordered semantics, as well as for the unordered one, the resulting semantics is a small variant of the classic (synchronous) bisimulation. A further result is that the language under unordered semantics is no more Turing powerful, hence the language becomes strictly less expressive.


Operational Semantic Parallel Composition Label Transition System Tuple Space Random Access Machine 
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 Berlin Heidelberg 1997

Authors and Affiliations

  • Nadia Busi
    • 1
  • Roberto Gorrieri
    • 2
  • Gianluigi Zavattaro
    • 2
  1. 1.Dipartimento di MatematicaUniversità di SienaSienaItaly
  2. 2.Dipartimento di Scienze dell'InformazioneUniversità di BolognaBolognaItaly

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