Schoen-Yau theorem

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This article describes a result related to the Ricci curvature of a Riemannian manifold


Any three-dimensional open positively Ricci-curved Riemannian manifold is diffeomorphic to \R^3.

Relation with other results

Zhu's theorem

Further information: Zhu's theorem

This relaxes the positivity assumption of Ricci curvature to a nonnegativity assumption, but places a further restriction that the manifold involved should be complete.