Mathematics – Differential Geometry
Scientific paper
2008-08-12
Mathematics
Differential Geometry
17 pages, Dedicated to Professor Udo Simon on his seventieth birthday
Scientific paper
We show, using two different approaches, that there exists a family of Riemannian metrics on the tangent bundle of a two-sphere, which induces metrics of constant curvature on its unit tangent bundle. In other words, given such a metric on the tangent bundle of a two-sphere, the Hopf map is identified with a Riemannian submersion from the universal covering space of the unit tangent bundle onto the two-sphere. A hyperbolic counterpart dealing with the tangent bundle of a hyperbolic plane is also presented.
Benyounes M.
Loubeau Eric
Nishikawa Seiki
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