EntityQ92377· pop 5· linked from 3 articlesErnst BarthelSign in to saveGerman mathematician (1890–1953)ConnectionsEarthConceptChristianityEntityphilosophyEntityQ5879EntityFriedrich NietzscheEntityAlsaceEntitymathematicianEntityinventionEntityAlbert SchweitzerEntitycosmologyEntitygeniusEntityInternet ArchiveEntityconic sectionEntityPlatonismEntitycosmosEntitynon-Euclidean geometryEntitySchiltigheimEntityUniversity of CologneEntityflat EarthEntityRiemannian geometryEntityCategories1890 births1953 deaths20th-century German inventors20th-century German male writers20th-century German mathematicians20th-century German philosophersAlsatian-German people