Fuzzy n-fold integral ideals in BL-algebras

In this paper, we introduce concepts of fuzzy n-fold integral ideals in BL-algebras and we state and prove several property of fuzzy n-fold integral ideals. Using a level subset of a fuzzy set in a BL-algebra, we give characterization of fuzzy n-fold integral ideals. Also, we prove that the homomorphic image and preimage of fuzzy n-fold integral ideals are fuzzy n-fold integral ideals.