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A stochastic interpretation of propositional dynamic logic: expressivity

Published online by Cambridge University Press:  12 March 2014

Ernst-Erich Doberkat*
Affiliation:
Chair for Software Technology and Department of Mathematics, Technische Universität Dortmund, 44227 Dortmund, Germany, E-mail: ernst-erich.doberkat@udo.edu

Abstract

We propose a probabilistic interpretation of Propositional Dynamic Logic (PDL). We show that logical and behavioral equivalence are equivalent over general measurable spaces. This is done first for the fragment of straight line programs and then extended to cater for the nondeterministic nature of choice and iteration, expanded to PDL as a whole. Bisimilarity is also discussed and shown to be equivalent to logical and behavioral equivalence, provided the base spaces are Polish spaces. We adapt techniques from coalgebraic stochastic logic and point out some connections to Souslin's operation from descriptive set theory. This leads to a discussion of complete stochastic Kripke models and model completion, which permits an adequate treatment of the test operator.

Information

Type
Research Article
Copyright
Copyright © Association for Symbolic Logic 2012

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