Soft BLBL-algebras based on fuzzy sets

By means of ∈∈-soft sets and qq-soft sets, some characterizations of (implicative, positive implicative and fantastic) filteristic soft BLBL-algebras are investigated. Finally, we prove that a soft set is an implicative filteristic soft BLBL-algebra if and only if it is both a positive implicative filteristic soft BLBL-algebra and a fantastic filteristic soft BLBL-algebra.