Fair Subtyping for Multi-Party Session Types

Luca Padovani 1, *
Abstract : We study a theory of session types in which we add a liveness property to the familiar safety one. In this setting, some subtype relations between session types that hold in other theories and that are commonly regarded as harmless become unsound. We present various equivalent definitions of the subtyping relation, we relate it with the standard ones, and we give algorithms for deciding it. Incidentally, we provide an original and remarkably simple coinductive characterization of the fair testing preorder for nondeterministic, sequential processes consisting of internal choices of outputs and external choices of inputs.
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Wolfgang Meuter; Gruia-Catalin Roman. 13th Conference on Coordination Models and Languages (COORDINATION), Jun 2011, Reykjavik, Iceland. Springer, Lecture Notes in Computer Science, LNCS-6721, pp.127-141, 2011, Coordination Models and Languages. 〈10.1007/978-3-642-21464-6_9〉
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Luca Padovani. Fair Subtyping for Multi-Party Session Types. Wolfgang Meuter; Gruia-Catalin Roman. 13th Conference on Coordination Models and Languages (COORDINATION), Jun 2011, Reykjavik, Iceland. Springer, Lecture Notes in Computer Science, LNCS-6721, pp.127-141, 2011, Coordination Models and Languages. 〈10.1007/978-3-642-21464-6_9〉. 〈hal-00546531v2〉

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