Fundamental groups of compact manifolds with non-negative Ricci curvature. - MathOverflow most recent 30 from http://mathoverflow.net2013-06-19T22:58:25Zhttp://mathoverflow.net/feeds/question/110529http://www.creativecommons.org/licenses/by-nc/2.5/rdfhttp://mathoverflow.net/questions/110529/fundamental-groups-of-compact-manifolds-with-non-negative-ricci-curvatureFundamental groups of compact manifolds with non-negative Ricci curvature.aglearner2012-10-24T11:25:47Z2012-10-24T18:12:38Z
<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#110567Answer by ε-δ for Fundamental groups of compact manifolds with non-negative Ricci curvature.ε-δ2012-10-24T18:12:38Z2012-10-24T18:12:38Z<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>