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Compositional Reasoning for Explicit Resource Management in Channel-Based Concurrency

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&nbsp;[&hellip;]

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Characterising Testing Preorders for Finite Probabilistic Processes

Yuxin Deng ; Matthew Hennessy ; Rob van Glabbeek ; Carroll Morgan.

In 1992 Wang & Larsen extended the may- and must preorders of De Nicola and Hennessy to processes featuring probabilistic as well as nondeterministic choice. They concluded with two problems that have remained open throughout the years, namely to find complete axiomatisations and alternative&nbsp;[&hellip;]

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Security Policies as Membranes in Systems for Global Computing

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,&nbsp;[&hellip;]

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