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KILLING VECTOR FIELDS OF CONSTANT LENGTH ON LOCALLY SYMMETRIC RIEMANNIAN MANIFOLDS

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Abstract

In this paper nontrivial Killing vector fields of constant length and the corresponding ows on smooth complete Riemannian manifolds are investigated. It is proved that such a ow on symmetric space is free or induced by a free isometric action of the circle S 1. Examples of unit Killing vector fields generated by almost free but not free actions of S 1 on locally symmetric Riemannian spaces are found; among them are homogeneous (nonsimply connected) Riemannian manifolds of constant positive sectional curvature and locally Euclidean spaces. Some unsolved questions are formulated.

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Correspondence to V. N. BERESTOVSKIĬ.

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DOI: 10.1007/s00031-008-9000-6.

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BERESTOVSKIĬ, V.N., NIKONOROV, Y.G. KILLING VECTOR FIELDS OF CONSTANT LENGTH ON LOCALLY SYMMETRIC RIEMANNIAN MANIFOLDS. Transformation Groups 13, 25–45 (2008). https://doi.org/10.1007/s00031-008-9000-6

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  • DOI: https://doi.org/10.1007/s00031-008-9000-6

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