Fuzzy implicative hyper BCK-ideals of hyper BCK-algebras.
Fuzzy interior ideals in ordered semigroups.
Fuzzy multiply positive implicative hyper BCK-ideals of hyper BCK-algebras.
Fuzzy neighborhood structures on partially ordered groups.
Fuzzy n-fold integral filters in BL-algebras
In this paper, we introduce the notion of fuzzy n-fold integral filter in BL-algebras and we state and prove several properties of fuzzy n-fold integral filters. Using a level subset of a fuzzy set in a BL-algebra, we give a characterization of fuzzy n-fold integral filters. Also, we prove that the homomorphic image and preimage of fuzzy n-fold integral filters are also fuzzy n-fold integral filters. Finally, we study the relationship among fuzzy n-fold obstinate filters, fuzzy n-fold integral filters...
Fuzzy positive implicative ordered filters of implicative semigroups.
Fuzzy -algebras with interval-valued membership functions.
Fuzzy quasi-ideals of ordered semigroups.
Fuzzy sets (in)equations with a complete codomain lattice
The paper applies some properties of the monotonous operators on the complete lattices to problems of the existence and the construction of the solutions to some fuzzy relational equations, inequations, and their systems, taking a complete lattice for the codomain lattice. The existing solutions are extremal - the least or the greatest, thus we prove some extremal problems related to fuzzy sets (in)equations. Also, some properties of upper-continuous lattices are proved and applied to systems of...
Fuzzy structures of PI() BCK-ideals in hyper BCK-algebras.