Fuzzy implicative hyper BCK-ideals of hyper BCK-algebras (Q1607812)

Summary: We consider the fuzzification of the notion of implicative hyper BCK-ideals, and then investigate several properties. Using the concept of level subsets, we give a characterization of fuzzy implicative hyper BCK-ideals. We state a relation between fuzzy hyper BCK-ideals and fuzzy implicative hyper BCK-ideals. We establish a condition for a fuzzy hyper BCK-ideal to be a fuzzy implicative hyper BCK-ideal. Finally, we introduce the notion of hyper homomorphisms of hyper BCK-algebras, and discuss related properties.