🌐EnglishEnglishDeutschEspañolFrançaisNederlandsPortuguêsTürkçeРусский日本語EntityQ5047048· pop 8· linked from 18 articlesCartan–Hadamard theoremOn the structure of complete Riemannian manifolds of non-positive sectional curvatureAvailable in 8 languagesEspañolFrançaisDeutschРусскийPortuguêsNederlandsUkrainianvia Wikidata sitelinks · CC0Connectionsmetric spaceEntitygeodesic curveEntityCategoriesMetric geometryTheorems in Riemannian geometry