Fundamental groups of compact manifolds with non-negative Ricci curvature. - MathOverflow most recent 30 from http://mathoverflow.net 2013-06-19T22:58:25Z http://mathoverflow.net/feeds/question/110529 http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://mathoverflow.net/questions/110529/fundamental-groups-of-compact-manifolds-with-non-negative-ricci-curvature Fundamental groups of compact manifolds with non-negative Ricci curvature. aglearner 2012-10-24T11:25:47Z 2012-10-24T18:12:38Z <p>I would like to find an appropriate reference for the following statement:</p> <p><strong>Statement.</strong> Let $M$ be a compact Riemannian manifold with non-negative Ricci curvature. Then $\pi_1(M)$ is virtually abelian.</p> <p>It seems to me that the statement should follow from the article of Cheeger and Gromoll "The spletting theorem for manifolds of non-negative Ricci curvature" <a href="http://intlpress.com/JDG/archive/1972/6-1-119.pdf" rel="nofollow">http://intlpress.com/JDG/archive/1972/6-1-119.pdf</a> but since it is not stated explicitly in the article I am not 100% sure.</p> <p>So, what would be a reference?</p> http://mathoverflow.net/questions/110529/fundamental-groups-of-compact-manifolds-with-non-negative-ricci-curvature/110567#110567 Answer by ε-δ for Fundamental groups of compact manifolds with non-negative Ricci curvature. ε-δ 2012-10-24T18:12:38Z 2012-10-24T18:12:38Z <p>The following paper has more than you want.</p> <p><a href="http://wwwmath.uni-muenster.de/sfb/about/publ/wilking3.ps" rel="nofollow">Wilking, Burkhard On fundamental groups of manifolds of nonnegative curvature. Differential Geom. Appl. 13 (2000), no. 2, 129–165.</a></p>