On (Є, Є V q)-Fuzzy Filters of Pseudo-BL Algebras

The aim of this paper is to introduce the notion of (Є;Є Vq)-fuzzy (implicative, MV -and G-) filters of pseudo-BL algebras and to investigate some of their related properties. Some characterization theorems of these generalized fuzzy (implicative) filters are derived. The relationship among these generalized fuzzy filters of pseudo-BL algebras is considered. It is proved that an (Є;Є Vq)- fuzzy filter of a pseudo-BL algebra is an (Є;Є Vq)-fuzzy implicative filter if and only if it is both an (Є;Є Vq)-fuzzy MV filter and an (Є;Є Vq)-fuzzy G-filter. Finally, we consider the concept of implication-based fuzzy implicative filters of pseudo-BL algebras, in particular, the implication operators in Lukasiewicz system of continuous-valued logic are discussed.