Variance asymptotics for random polytopes in smooth convex bodies

Pierre Calka (1) , J. E. Yukich (2)

1 LMRS - Laboratoire de Mathématiques Raphaël Salem
2 Lehigh University - Department of Mathematics

Let $K \subset \R^d$ be a smooth convex set and let $\P_\la$ be a Poisson point process on $\R^d$ of intensity $\la$. The convex hull of $\P_\la \cap K$ is a random convex polytope $K_\la$. As $\la \to \infty$, we show that the variance of the number of $k$-dimensional faces of $K_\la$, when properly scaled, converges to a scalar multiple of the affine surface area of $K$. Similar asymptotics hold for the variance of the number of $k$-dimensional faces for the convex hull of a binomial process in $K$.

Domaines: Probabilités [math.PR]

Pierre Calka, J. E. Yukich. Variance asymptotics for random polytopes in smooth convex bodies. 2012. ⟨hal-00710266⟩