Obata, Morio Certain conditions for a Riemannian manifold to be isometric with a sphere. (English) Zbl 0115.39302 J. Math. Soc. Japan 14, 333-340 (1962). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 20 ReviewsCited in 292 Documents Keywords:Riemannian manifolds PDF BibTeX XML Cite \textit{M. Obata}, J. Math. Soc. Japan 14, 333--340 (1962; Zbl 0115.39302) Full Text: DOI OpenURL