Abstract
We suggest a new characterization that draws finer lines between branching-time and linear-time formulas of the logic CTL*. We define three types of linearity, strong linearity, sub-linearity and equi-linearity, each of which contains all LTL formulas. We prove that these notions are distinct. Moreover, strong linearity implies sub-linearity which implies equi-linearity. We investigate these notions over Kripke structures with and without fairness and show that they do not coincide. We give a syntactic characterization for linear ∀CTL* formulas. Finally, we discuss the practical implication of the new characterization.
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© 1994 Springer-Verlag Berlin Heidelberg
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Grumberg, O., Kurshan, R.P. (1994). How linear can branching-time be?. In: Gabbay, D.M., Ohlbach, H.J. (eds) Temporal Logic. ICTL 1994. Lecture Notes in Computer Science, vol 827. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0013988
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DOI: https://doi.org/10.1007/BFb0013988
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