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Two ways of assigning meaning to a language with uniform concurrency are presented and compared. The language has uninterpreted elementary actions from which statements are composed using sequential composition, nondeterministic choice, parallel composition with communication, and recursion. The first semantics uses infinite streams in the sense which is a refinement of the linear time semantics of...
A survey is given of work performed by the authors in recent years concerning the semantics of imperative concurrency. Four sample languages are presented for which a number of operational and denotational semantic models are developed. All languages have parallel execution through interleaving, and the last three have as well a form of synchronization. Three languages are uniform, i.e., they have...
Parallel programs with shared variables are studied under a semantics which assumes the fair execution of all parallel components. We present transformations which reduce this fair semantics to a simple interleaving semantics with help of random assignments z:=?. In fact, different notions of fairness are considered: impartiality, liveness, weak and strong fairness. All transformations preserve the...
We are aiming at a classification of semantical models for Communicating Processes that will enable us to recommend certain models which are just detailed enough for particular applications. But before such an aim can be fully realised, more sophisticated models of processes should be studied. For example, we have not considered the notion of state so far. This would allow to add assignment...
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