On critical point equation of compact manifolds with zero radial Weyl curvature

Certain conditions for a Riemannian manifold to be isometric with a sphere

Morio Obata · Journal of the Mathematical Society of Japan · 1962 · 689 citations · Full text

Certain Conditions, Global Geometry, Geometry +4

Hypersurfaces and a Pinching Problem on the Second Fundamental Tensor

Masafumi Okumura · American Journal of Mathematics · 1974 · 234 citations

Pinching Problem, Geometric Partial Differential Equation, Global Geometry +4

On Bach-flat gradient shrinking Ricci solitons

Huai-Dong Cao, Qiang Chen · Duke Mathematical Journal · 2013 · 136 citations · Full text

On the classification of gradient Ricci solitons

Geometry & Topology · 2010 · 115 citations · Full text

On the classification of warped product Einstein metrics

Chenxu He, Peter Petersen, William Wylie · Communications in Analysis and Geometry · 2012 · 108 citations · Full text