Processes with infinite liveness requirements

In this paper we develop a deterministic process algebra for describing and reasoning about liveness requirements of infinite behaviour systems beyond the ones usually captured by non-deterministic process models. These liveness requirements refer to the capability of processes to engage spontaneously in some actions and to wait passively for the triggering of other actions by other processes. A semantic theory based on three equivalent semantic domains (denotational, operational, and axiomatic) is developed for the language of process terms.