🌐EnglishEnglishDeutschFrançaisSvenskaTiếng ViệtTürkçeРусский한국어中文日本語EntityQ2394548· pop 11· linked from 42 articlesHurewicz theoremtheorem that relates homotopy groups to homology groupsConnectionshomologyEntityN-connectedEntityCategoriesHomology theoryTheorems in algebraic topologyTheorems in homotopy theory