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Towards a unified approach to encodability and separation results for process calculi. (English) Zbl 1209.68336
Summary: We present a unified approach to evaluate the relative expressive power of process calculi. In particular, we identify a small set of criteria (that have already been somehow presented in the literature) that an encoding should satisfy to be considered a valid means for language comparison. We argue that the combination of such criteria is a valid proposal by noting that: (i) several well-known encodings appeared in the literature satisfy them; (ii) this notion is not trivial, because some known encodings do not satisfy all the criteria we have proposed; (iii) several well-known separation results can be formulated in terms of our criteria; and (iv) some widely believed (but never formally proved) separation results can be proved by using the criteria we propose. Moreover, the criteria defined induce general proof-techniques for separation results that can be easily instantiated to cover known case-studies.

##### MSC:
 68Q85 Models and methods for concurrent and distributed computing (process algebras, bisimulation, transition nets, etc.)
##### Keywords:
process calculi; expressiveness; encodings
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##### References:
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