🌐EnglishEnglishBahasa IndonesiaItalianoPortuguêsTiếng ViệtРусскийفارسی한국어中文日本語EntityQ15120004· pop 17Template:Set theoryWikimedia templateAvailable in 17 languages中文日本語РусскийPortuguêsItalianoBahasa IndonesiaCzechMalayalamsimpleSinhalaCategoriesFoundations of Mathematics navigational boxesLogic templates