Abstract
We give a positive answer to the Chavel’s conjecture (J Differ Geom 4:13–20, 1970): a simply connected rank one normal homogeneous space is symmetric if any pair of conjugate points are isotropic. It implies that all simply connected rank one normal homogeneous space with the property that the isotropy action is variational complete is a rank one symmetric space.
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References
Aloff, S., Wallach, N.R.: An infinite family of distinct 7-manifolds admitting positively curved Riemannian structures. Bull. Am. Math. Soc. 81, 93–97 (1975)
Berger, M.: Les variétés riemanniennes homogènes simplement connexes à courbure strictement positive. Ann. Scuola Norm. Sup. Pisa 15, 179–246 (1961)
Besse, A.L.: Einstein Manifolds, Ergebnisse der Mathematik und ihrer Grenzgebiete 3 Folge, Band 10. Springer, Berlin (1987)
Bott, R., Samelson, H.: Applications of the theory of Morse to symmetric spaces. Am. J. Math. 80, 964–1029 (1958) [Correction in: Am. J. Math. 83, 207–208 (1961)]
Chavel, I.: Isotropic Jacobi fields and Jacobi’s equations on Riemannian homogeneous spaces. Comm. Math. Helv. 42, 237–248 (1967)
Chavel, I.: On normal Riemannian homogeneous spaces of rank 1. Bull. Am. Math. Soc. 73, 477–481 (1967)
Chavel, I.: A class of Riemannian homogeneous spaces. J. Differ. Geom. 4, 13–20 (1970)
Eliasson, H.I.: Die Krümmung des Raumes \(Sp(2)/SU(2)\) von Berger. Math. Ann. 164, 317–327 (1966)
González-Dávila, J.C.: Isotropic Jacobi fields on compact 3-symmetric spaces. J. Differ. Geom. 83, 273–288 (2009)
González-Dávila, J.C.: Jacobi osculating rank and isotropic geodesics on naturally reductive 3-manifolds. Differ. Geom. Appl. 27(4), 482–495 (2009)
González-Dávila, J.C., Salazar, R.O.: Isotropic Jacobi fields on naturally reductive spaces. Publ. Math. Debr. 66, 41–61 (2005)
Heintze, E.: The curvature of \(SU(5)/(Sp(2)\times S^{1})\). Invent. Math. 13, 205–212 (1971)
Helgason, S.: Differential Geometry, Lie Groups, and Symmetric Spaces. Academic Press, New York (1978)
Jensen, G.R.: Einstein metrics on principle fibre bundles. J. Differ. Geom. 8, 599–614 (1973)
Kobayashi, S., Nomizu, K.: Foundations of Differential Geometry, I, II. Interscience Publishers, New York (1963). 1969
Oniscik, A.L.: Transitive compact transformation groups. Mat. Sb. 60 (1963) [Russian]; Am. Math. Soc. Transl. 55, 153–194 (1966)
Püttmann, T.: Optimal pinching constants of odd-dimensional homogeneous spaces. Invent. Math. 138, 631–684 (1999)
Sagle, A.: A note on triple systems and totally geodesic submanifolds in a homogeneous space. Nagoya Math. J. 91, 5–20 (1968)
Wallach, N.R.: Compact homogeneous Riemannian manifolds with strictly positive sectional curvature. Ann. Math. (2) 96, 277–295 (1972)
Wilking, B.: The normal homogeneous space \((SU(3)\times SO(3))/U^{\bullet }(2)\) has positive sectional curvature. Proc. Am. Math. Soc. 127(4), 1191–1194 (1999)
Ziller, W.: The Jacobi equation on naturally reductive compact Riemannian homogeneous spaces. Comm. Math. Helv. 52, 573–590 (1977)
Ziller, W.: Homogeneous Einstein metrics on spheres and projective spaces. Math. Ann. 259, 351–358 (1982)
Acknowledgments
This study has been supported by D.G.I. (Spain) and FEDER Project MTM2010-15444. Also A. M. Naveira has been partially supported by the Generalitat Valenciana Project Prometeo 2009/099.
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González-Dávila, J.C., Naveira, A.M. Existence of non-isotropic conjugate points on rank one normal homogeneous spaces. Ann Glob Anal Geom 45, 211–231 (2014). https://doi.org/10.1007/s10455-013-9395-8
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DOI: https://doi.org/10.1007/s10455-013-9395-8
Keywords
- Jacobi field
- Isotropically conjugate point
- Strictly isotropic conjugate point
- Normal homogeneous space
- Variational complete action