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 22 ReviewsCited in 364 Documents Keywords:Riemannian manifolds × Cite Format Result Cite Review PDF Full Text: DOI