#### Volume 19, issue 3 (2015)

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How to lift positive Ricci curvature

### Catherine Searle and Frederick Wilhelm

Geometry & Topology 19 (2015) 1409–1475
##### Abstract

We show how to lift positive Ricci and almost nonnegative curvatures from an orbit space $M∕G$ to the corresponding $G“$–manifold, $M$. We apply the results to get new examples of Riemannian manifolds that satisfy both curvature conditions simultaneously.

##### Keywords
Ricci curvature, almost nonnegative curvature, Cheeger deformations, conformal change of metric
Primary: 53C20