Semi-Riemannian submersions with totally geodesic fibres

Details Semi-Riemannian submersions with totally geodesic fibres Semi-Riemannian submersions with totally geodesic fibres

2000-05-25

arxiv.org/abs/math/0005254v4

Tohoku Math. J. 56(2004) No. 2, 179-204

Mathematics

Differential Geometry

25 pages. Corrections: In some statements, metrics induced on fibres are now assumed to be negative definite. Lemma 3.12 of th

Scientific paper

We classify semi-Riemannian submersions with connected totally geodesic fibres from a real pseudo-hyperbolic space onto a semi-Riemannian manifold under the assumption that the dimension of the fibres is less than or equal to three and the metrics induced on fibres are negative definite. Also, we obtain the classification of semi-Riemannian submersions with connected complex totally geodesic fibres from a complex pseudo-hyperbolic space onto a semi-Riemannian manifold under the assumption that the dimension of the fibres is less than or equal to two and the metric induced on fibres are negative definite. We prove that there are no semi-Riemannian submersions with connected quaternionic fibres from a quaternionic pseudo-hyperbolic space onto a Riemannian manifold.

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