🌐EnglishEnglishDeutschFrançaisItalianoTiếng ViệtРусскийالعربيةفارسی中文日本語EntityQ1640811· pop 9· linked from 61 articlesfiberinverse image of a singleton in the field of mathematicsAvailable in 9 languages中文日本語ItalianoالعربيةGalicianHebrewTiếng Việtفارسیvia Wikidata sitelinks · CC0Connectionsmonotonic functionEntityimageEntityCategoriesBasic concepts in set theoryMathematical relations