A theory of bisimulation for a fragment of concurrent ML with local names

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Description/Abstract

Concurrent ML is an extension of Standard ML with π-calculus-like primitives for multithreaded programming. CML has a reduction semantics, but to date there has been no labelled transition system semantics provided for the entire language. In this paper, we present a labelled transition semantics for a fragment of CML called µvCML which includes features not covered before: dynamically generated local channels and thread identifiers. We show that weak bisimilarity for µvCML is a congruence, and coincides with barbed bisimulation congruence. We also provide a variant of Sangiorgi's normal bisimulation for µvCML, and show that this too coincides with bisimilarity.