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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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
Key words and phrases
- Riemannian manifolds
- Killing vector fields
- Clifford-Wolf translations
- circle actions
- geodesics
- homogeneous spaces
- symmetric spaces