Abstract
We present a general construction of naturally reductive spaces. For most of these spaces the naturally reductive structure is not induced from a normal homogeneous structure. First the infinitesimal models of these spaces are constructed. To these we apply the Nomizu construction to describe explicitly a transitive group of isometries and the naturally reductive structure with respect to this group action.
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References
I. Agricola, A. C. Ferreira, Tangent Lie groups are Riemannian naturally reductive spaces, Adv. Appl. Clifford Algebr. 27 (2017), no. 2, 895–911.
I. Agricola, A. C. Ferreira, T. Friedrich, The classification of naturally reductive homogeneous spaces in dimensions n ≤ 6, Differential Geom. Appl. 39 (2015), 59–92.
I. Agricola, A. C. Ferreira, R. Storm, Quaternionic Heisenberg groups as naturally reductive homogeneous spaces, Int. J. Geom. Methods Mod. Phys. 12 (2015), no. 8, 1560007.
W. Ambrose, I. M. Singer, On homogeneous Riemannian manifolds, Duke Math. J. 25 (1958), 647–669.
J. E. D’Atri, W. Ziller, Naturally Reductive Metrics and Einstein Metrics on Compact Lie Groups, Mem. Amer. Math. Soc. 18 (1979), no. 215.
T. Friedrich, S. Ivanov, Parallel spinors and connections with skew-symmetric torsion in string theory, Asian J. Math. 6 (2002), no. 2, 303–335.
C. S. Gordon, Naturally reductive homogeneous Riemannian manifolds, Canad. J. Math. 37 (1985), no. 3, 467–487.
S. Kobayashi, K. Nomizu, Foundations of Differential Geometry, Vol. I, Interscience Publishers, Wiley, New York, 1963.
B. Kostant, On differential geometry and homogeneous spaces, I, II, Proc. Nat. Acad. Sci. USA 42 (1956), 258–261, 354–357.
B. Kostant, A characterization of invariant affine connections, Nagoya Math. J. 16 (1960), 35–50.
O. Kowalski, Counterexample to the “second Singer's theorem”, Ann. Global Anal. Geom. 8 (1990), no. 2, 211–214.
O. Kowalski, L. Vanhecke, Four-dimensional naturally reductive homogeneous spaces, in: Conference on Differential Geometry on Homogeneous Spaces (Turin, 1983), Rend. Sem. Mat. Univ. Politec. Torino 1983, Special Issue, 1984 pp. 223–232.
O. Kowalski, L. Vanhecke, Classification of five-dimensional naturally reductive spaces, Math. Proc. Cambridge Philos. Soc. 97 (1985), no. 3, 445–463.
A. Medina, Ph. Revoy, Algèbres de Lie et produit scalaire invariant, Ann. Sci. École Norm. Sup. (4) 18 (1985), no. 3, 553–561.
Yu. G. Nikonorov, Geodesic orbit manifolds and Killing fields of constant length, Hiroshima Math. J. 43 (2013), no. 1, 129–137.
K. Nomizu, Invariant affine connections on homogeneous spaces, Amer. J. Math. 76 (1954), 33–65.
F. Tricerri, Locally homogeneous Riemannian manifolds, in: Differential Geometry (Turin, 1992), Rend. Sem. Mat. Univ. Politec. Torino 50 (1992), no. 4, 1993, pp. 411–426.
F. Tricerri, L. Vanhecke, Homogeneous Structures on Riemannian Manifolds, London Mathematical Society Lecture Note Series, Vol. 83, Cambridge University Press, Cambridge, 1983.
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STORM, R. A NEW CONSTRUCTION OF NATURALLY REDUCTIVE SPACES. Transformation Groups 23, 527–553 (2018). https://doi.org/10.1007/s00031-017-9446-5
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DOI: https://doi.org/10.1007/s00031-017-9446-5