. "fuzzy variable" . "fuzzy" . "Fuzzy set" . . . . . . . . "Fuzzy_set#Fuzzy_relation_equation" . "fuzzy-set theory" . . . . "Fuzzy_set#Pythagorean_fuzzy_sets" . . . "''Fuzzy Set Theory (FST)''" . "fuzzy sets" . . "fuzzy data" . . "Fuzzy set#Fuzzy categories" . . "fuzzy subsets" . "Intuitionistic fuzzy sets" . . . "Fuzzy_set#Fuzzy_categories" . . "fuzzy set" . . "other methods" . . . . . . "fuzzy set theory" . "Fuzzy Sets" . . . "Fuzzy set" . .