https://neckpinch.com/authors/r-m-schoen/New arXiv papers by R. M. Schoen, from Neckpinch Tue, 03 Nov 2026 07:15:30 GMT https://arxiv.org/abs/0705.0766arxiv:0705.0766Sun, 06 May 2007 00:00:00 GMTS. Brendle, R. M. Schoen — Let (M,g_0) be a compact Riemannian manifold with pointwise 1/4-pinched sectional curvatures. We show that the Ricci flow deforms g_0 to a constant curvature metric. The proof uses the fact, also established in this paper, that positive isotropic curvature is preserved by the Ricci flow in all dimensions. We also rely on earlier work of Hamilton and of Bohm and Wilking.Ricci flowSphere theorems