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An invariant Kahler metric on the tangent disk bundle of a space-form

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 Added by Rui Albuquerque
 Publication date 2016
  fields
and research's language is English




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We find a family of Kahler metrics invariantly defined on the radius $r_0>0$ tangent disk bundle ${{cal T}_{M,r_0}}$ of any given real space-form $M$ or any of its quotients by discrete groups of isometries. Such metrics are complete in the non-negative curvature case and non-complete in the negative curvature case. If $dim M=2$ and $M$ has constant sectional curvature $K eq0$, then the Kahler manifolds ${{cal T}_{M,r_0}}$ have holonomy $mathrm{SU}(2)$; hence they are Ricci-flat. For $M=S^2$, just this dimension, the metric coincides with the Stenzel metric on the tangent manifold ${{cal T}_{S^2}}$, giving us a new most natural description of this well-know metric.



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167 - Rui Albuquerque 2016
We find a new class of invariant metrics existing on the tangent bundle of any given almost-Hermitian manifold. We focus here on the case of Riemannian surfaces, which yield new examples of Kahlerian Ricci-flat manifolds in four real dimensions.
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