Abstract
Given a \(\varPi ^{\mu }_2\) formula of the modal \(\mu \) calculus, it is decidable whether it is equivalent to a \(\varSigma ^{\mu }_2\) formula.
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assuming \(| Act |=2\); otherwise trees with one successor per label.
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Achnowledgements
We thank the anonymous reviewers for their thoughtful comments and corrections. The work presented here has been supported by an EPSRC doctoral studentship at the University of Edinburgh.
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Lehtinen, K., Quickert, S. (2017). \(\varSigma ^{\mu }_2\) is decidable for \(\varPi ^{\mu }_2\) . In: Kari, J., Manea, F., Petre, I. (eds) Unveiling Dynamics and Complexity. CiE 2017. Lecture Notes in Computer Science(), vol 10307. Springer, Cham. https://doi.org/10.1007/978-3-319-58741-7_28
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