Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2024-12-24T01:53:09.307Z Has data issue: false hasContentIssue false

Invariant Metrics with Nonnegative Curvature on Compact Lie Groups

Published online by Cambridge University Press:  20 November 2018

Nathan Brown
Affiliation:
Department of Mathematics, Stanford University, Stanford, CA 94305-2125, U.S.A. e-mail: [email protected]@alum.mit.edu
Rachel Finck
Affiliation:
Department of Mathematics, Stanford University, Stanford, CA 94305-2125, U.S.A. e-mail: [email protected]@alum.mit.edu
Matthew Spencer
Affiliation:
Department of Mathematics, Brown University, Providence, RI 02912 e-mail: [email protected]
Kristopher Tapp
Affiliation:
Department of Mathematics, Williams College, Williamstown, MA 01267, U.S.A. e-mail: [email protected]
Zhongtao Wu
Affiliation:
88 College Road, Princeton, MA 08544, U.S.A. e-mail: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We classify the left-invariant metrics with nonnegative sectional curvature on $\text{SO}\left( 3 \right)$ and $U\left( 2 \right)$.

Keywords

Type
Research Article
Copyright
Copyright © Canadian Mathematical Society 2007

References

[1] Cheeger, J., Some examples of manifolds of nonnegative curvature. J. Differential Geometry 8(1973), 623628.Google Scholar
[2] Cheeger, J. and Gromoll, D., On the structure of complete open manifolds of nonnegative curvature. Ann. of Math. 96(1972), 413443.Google Scholar
[3] Dickinson, W., Curvature properties of the positively curved Eschenburg spaces. Differential Geom. Appl. 20(2004), no. 1, 101124.Google Scholar
[4] Eschenburg, J. H., Inhomogeneous spaces of positive curvature. Differential Geom. Appl. 2(1992), no. 1, 123132.Google Scholar
[5] Geroch, R., Group-quotients with positive sectional curvatures. Proc. Amer.Math. Soc. 66(1977), no. 2, 321326.Google Scholar
[6] Grove, K. and Ziller, W., Curvature and symmetry of Milnor spheres. Ann. of Math. 152(2000), no. 1, 331367.Google Scholar
[7] Milnor, J., Curvatures of left-invariant metrics on lie groups. Advances in Math. 21(1976), 293329.Google Scholar
[8] Püttmann, T., Optimal pinching constants of odd dimensional homogeneous spaces. Ph. D. thesis, Ruhr-Universität, Germany, 1991.Google Scholar
[9] Tapp, K., Quasi-positive curvature on homogeneous bundles. J. Differential Geom. 66(2003), no. 2, 273287.Google Scholar
[10] Totaro, B., Cheeger manifolds and the classification of biquotients. J. Differential Geom. 61(2002), no. 3, 397451.Google Scholar
[11] Wallach, N., Compact homogenous Riemannian manifolds with strictly positive curvature. Ann. of Math. 96(1972), 277295.Google Scholar
[12] Yang, D., On complete metrics of nonnegative curvature on 2-plane bundles. Pacific J. Math. 171(1995), no. 2, 569583.Google Scholar