🌐EnglishEnglishEspañolPolskiРусскийفارسی中文日本語EntityQ1967302· pop 11· linked from 10 articlesMembership functiona generalization of the indicator function in classical setsAvailable in 11 languagesEspañol中文РусскийBulgarianChuvashMacedonianPolskiRomanianUkrainianConnectionsmathematicsEntityprobabilityEntityCategoriesFuzzy logic