Abstract

We define and study the notion of fuzzy n-fold obstinate filters in BL-algebras. Several properties of fuzzy n-fold obstinate filters are given. Using a level set of a fuzzy set in a BL-algebra, we give a characterization of fuzzy n-fold obstinate filters. We prove that the homomorphic image and preimage of fuzzy n-fold obstinate filters are also fuzzy n-fold obstinate filters.

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