R. Bruni, F. Honsell, M. Lenisa, and M. Miculan

Modeling fresh names in pi-calculus using abstractions

Technical Report TR-21-02, Dipartimento di Matematica e Informatica, Università di Udine, Italy, 2002


In this paper, we model fresh names in the pi-calculus using abstractions w.r.t. a new binding operator theta. Both the theory and the metatheory of the pi-calculus benefit from this simple extension. The operational semantics of this new calculus is finitely branching. Bisimulation can be given without mentioning any constraint on names, thus allowing for a straightforward definition of a coalgebraic semantics. This is cast within a category of coalgebras over algebras with infinitely many unary operators, in order to capitalize on theta. Following previous work by Montanari and Pistore, we present also a finite representation for finitary processes and a finite state verification procedure for bisimilarity, based on the new notion of theta-automaton. Finally, we improve previous encodings of the pi-calculus in the Calculus of Inductive Constructions.


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