On the intrinsic geometry of a unit vector field

Details On the intrinsic geometry of a unit vector field On the intrinsic geometry of a unit vector field

2005-03-24

arxiv.org/abs/math/0503565v1

Comment. Mat. Univ. Carolinae 43, 2 (2002), 299-317

Mathematics

Differential Geometry

19 pages

Scientific paper

We study the geometrical properties of a unit vector field on a Riemannian 2-manifold, considering the field as a local imbedding of the manifold into its tangent sphere bundle with the Sasaki metric. For the case of constant curvature K, we give a description of the totally geodesic unit vector fields for K=0 and K=1 and prove a non-existence result for K not equal to 0 and 1. We also found a family of vector fields on the hyperbolic 2-plane L^2 of curvature -c^2 which generate foliations on unit tangent bundle over L^2 with leaves of constant intrinsic curvature -c^2 and of constant extrinsic curvature -c^2/4.

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