Convexity on Complex Hyperbolic Space

Details Convexity on Complex Hyperbolic Space Convexity on Complex Hyperbolic Space

2010-03-24

arxiv.org/abs/1003.4667v1

Mathematics

Differential Geometry

Scientific paper

In a Riemannian manifold a regular convex domain is said to be $\lambda$-convex if its normal curvature at each point is greater than or equal to $\lambda$. In a Hadamard manifold, the asymptotic behaviour of the quotient $\vol(\Omega(t))/\vol(\partial\Omega(t))$ for a family of $\lambda$-convex domains $\Omega(t)$ expanding over the whole space has been studied and general bounds for this quotient are known. In this paper we improve this general result in the complex hyperbolic space $\CH$, a Hadamard manifold with constant holomorphic curvature equal to $-4k^2$. Furthermore, we give some specific properties of convex domains in $\CH$ and we prove that $\lambda$-convex domains of arbitrary radius exists if $\lambda\leq k$.

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