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Limit theorems for the convex hull of random points in higher dimensions
Authors:Irene Hueter
Institution:Department of Mathematics, University of Florida, Gainesville, Florida 32611
Abstract:We give a central limit theorem for the number $ N_n $ of vertices of the convex hull of $n$ independent and identically distributed random vectors, being sampled from a certain class of spherically symmetric distributions in $\mathbb{R}^d  (d> 1),$ that includes the normal family. Furthermore, we prove that, among these distributions, the variance of $N_n $ exhibits the same order of magnitude as the expectation as $n \rightarrow \infty. $ The main tools are Poisson approximation of the point process of vertices of the convex hull and (sub/super)-martingales.

Keywords:Convex hull  Poisson point process  Markovian jump process  (sub/super)-martingales  central limit theorem  rotationally invariant distributions  
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