Computer Science ›› 2014, Vol. 41 ›› Issue (11): 99-102,106.doi: 10.11896/j.issn.1002-137X.2014.11.019

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Axiomatizing Weak Covariant-contravariant Simulation Semantics

ZHANG Wei   

  • Online:2018-11-14 Published:2018-11-14

Abstract: Process algebra,as one of the important tools for describing and analyzing concurrent and distributed systems,becomes a central branch of research in concurrency theory.Simulation is considered as one of the fundamental notions for describing the refinement relation between processes.Covariant-contravariant simulation generalizes plain simulation and distinguishes the types of actions.Intuitively,it captures the fact that it is not always the case that “the larger the number of behaviors,the better”.But covariant-contravariant simulation ignores the difference between observable actions and silent actions.This paper presented the notion of a weak covariant-contravariant simulation and provided its axiomatic system.The soundness and ground-completeness are established in this system.Furthermore,we proved that such system is also ω-complete.

Key words: Process algebra,Covariant-contravariant simulation,Soundness,Completeness

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