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Expressiveness of the modal mu-calculus on monotone neighborhood structures (1502.07889v1)
Published 27 Feb 2015 in cs.LO
Abstract: We characterize the expressive power of the modal mu-calculus on monotone neighborhood structures, in the style of the Janin-Walukiewicz theorem for the standard modal mu-calculus. For this purpose we consider a monadic second-order logic for monotone neighborhood structures. Our main result shows that the monotone modal mu-calculus corresponds exactly to the fragment of this second-order language that is invariant for neighborhood bisimulations.