🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaРусскийفارسی한국어中文日本語EntityQ284347· pop 16· linked from 98 articlesT1 spaceAlso known as T₁ spacetopological space in which all singleton sets are closedAvailable in 16 languagesEspañolFrançaisDeutsch中文日本語PortuguêsItalianoCatalanGalicianNederlandsPolskiSvenskaConnectionsKolmogorov spaceEntitycofinite subsetEntityCategoriesProperties of topological spacesSeparation axioms