In this paper, we propose fuzzy topological semantics for Łukasiewicz valued modal logic, based on the standard Łukasiewicz algebra.Within this setting, formulas are interpreted as fuzzy sets of truth values, while the modal operators are realized through fuzzy interior and closure operators.We define a Kripke-induced fuzzy Alexandroff topology and establish a precise correspondence between Łukasiewicz fuzzy Kripke semantics and its topological counterpart.The proposed topological semantics validates the S4 modal axioms that include reflexivity, transitivity, monotonicity, normality, and the necessitation of truth.
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Khan et al. (2026) studied this question.
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