Abstract
Classifications of (alpha, beta)-fuzzy ideals of BCK/BCI-algebras are discussed. Relations between (is an element of; is an element of boolean OR q)-fuzzy ideals and (q, is an element of boolean OR q)-fuzzy ideals are established. Given a special set, so called t-q-set, conditions for the t-q-set to be an ideal are considered. The notions of an (is an element of, q)(max)-fuzzy ideal and a (q, is an element of)(max)-fuzzy ideal are introduced, and conditions for a fuzzy set to be an (is an element of, q)(max)-fuzzy ideal and a (q, is an element of)(max)-fuzzy ideal are provided.