5 results
Andrea Cerone ; Matthew Hennessy ; Massimo Merro.
We present a timed process calculus for modelling wireless networks in which individual stations broadcast and receive messages; moreover the broadcasts are subject to collisions. Based on a reduction semantics for the calculus we define a contextual equivalence to compare the external behaviour of […]
Published on March 31, 2015
Giovanni Bernardi ; Matthew Hennessy.
Session types are used to describe and structure interactions between independent processes in distributed systems. Higher-order types are needed in order to properly structure delegation of responsibility between processes. In this paper we show that higher-order web-service contracts can be used […]
Published on June 29, 2016
Adrian Francalanza ; Edsko DeVries ; Matthew Hennessy.
We define a pi-calculus variant with a costed semantics where channels are treated as resources that must explicitly be allocated before they are used and can be deallocated when no longer required. We use a substructural type system tracking permission transfer to construct coinductive proof […]
Published on June 26, 2014
Giovanni Bernardi ; Matthew Hennessy.
In the standard testing theory of DeNicola-Hennessy one process is considered to be a refinement of another if every test guaranteed by the former is also guaranteed by the latter. In the domain of web services this has been recast, with processes viewed as servers and tests as clients. In this way […]
Published on April 14, 2015
Daniele Gorla ; Matthew Hennessy ; Vladimiro Sassone.
We propose a simple global computing framework, whose main concern is code migration. Systems are structured in sites, and each site is divided into two parts: a computing body, and a membrane, which regulates the interactions between the computing body and the external environment. More precisely, […]
Published on December 20, 2005