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2011-10-05
Sub-Riemannian balls in CR Sasakian manifolds
Fabrice BaudoinMichel Bonnefont
文献摘要
We prove global estimates for the sub-Riemannian distance of CR Sasakian manifolds with non negative horizontal Webster-Tanaka Ricci curvature. In particular, in this setting, large sub-Riemannian balls are comparable to Riemannian balls.
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