1994 | ReviewPaper | Buchkapitel
Algebraic theories for name-passing calculi
verfasst von : Joachim Parrow, Davide Sangiorgi
Erschienen in: A Decade of Concurrency Reflections and Perspectives
Verlag: Springer Berlin Heidelberg
Enthalten in: Professional Book Archive
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In a theory of processes the names are atomic data items which can be exchanged and tested for identity, but which admit no other functions or predicates. A well-known example of a calculus for name-passing is the π-calculus, where names additionally are used as communication ports. We provide complete axiomatisations of late and early bisimulation equivalences in such calculi. Since neither of the equivalences is a congruence we also axiomatise the corresponding largest congruences. We consider a few variations of the signature of the language; among these, a calculus of deterministic processes which is reminiscent of sequential functional programs with a conditional construct. Most of our axioms have been shown to be independent. The structure of the systems reveals the symmetries of the calculi and equivalences since they differ only by a few simple axioms.