🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaРусский한국어中文日本語EntityQ1068085· pop 18· linked from 96 articlesclosed graph theoremtheoremAvailable in 18 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoCatalanDanishConnectionscontinuous functionEntitygeneral topologyEntityCategoriesTheorems in functional analysis