Abstract

We provide and prove logical characterizations of fuzzy simulations between fuzzy Kripke models that use a general t-norm-based semantics. We also extend the results for fuzzy Kripke models defined over a general residuated lattice. Our logical characterizations of fuzzy simulations are formulated w.r.t. positive existential fragments of fuzzy propositional dynamic logic without tests and concern fuzzy preservation of positive existential modal formulas under fuzzy simulations as well as the Hennessy-Milner property of fuzzy simulations.

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