Bisimulations and divergence

Behavioral preorders based on the idea of bisimulation equivalence and providing explicit treatments of the phenomenon of divergence in communicating systems are investigated. Particular study is made of those preorders in the context of R. Milner's (1980) calculus of communicating systems. The precongruence relations generated by the preorders are characterized and axiomated on the classes of finite closed terms and sequential terms. A compositional verification technique based on the theory of the preorders is introduced and illustrated.<
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