Conformally flat manifolds with nonnegative Ricci curvature

Details Conformally flat manifolds with nonnegative Ricci curvature Conformally flat manifolds with nonnegative Ricci curvature

2004-10-06

arxiv.org/abs/math/0410180v2

Mathematics

Differential Geometry

revised version, added reference to previous paper by S. Zhu on the same subject

Scientific paper

We show that complete conformally flat manifolds of dimension n>2 with nonnegative Ricci curvature enjoy nice rigidity properties: they are either flat, or locally isometric to a product of a sphere and a line, or are globally conformally equivalent to flat space or to a spherical spaceform. This extends previous works by Q.-M. Cheng, M.H. Noronha, B.-L. Chen and X.-P. Zhu, and S. Zhu.

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