English

On convex hull of Gaussian samples

Probability 2015-03-17 v1

Abstract

Let Xi=Xi(t),tTX_i = {X_i(t), t \in T} be i.i.d. copies of a centered Gaussian process X=X(t),tTX = {X(t), t \in T} with values in Rd\mathbb{R}^d defined on a separable metric space T.T. It is supposed that XX is bounded. We consider the asymptotic behaviour of convex hulls Wn=\conv X1(t),Xn(t),tT W_n = \conv\ {X_1(t), X_n(t), t \in T} and show that with probability 1 limn12lnnWn=W \lim_{n\to \infty} \frac{1}{\sqrt{2\ln n}} W_n = W (in the sense of Hausdorff distance), where the limit shape WW is defined by the covariance structure of XX: W = \conv {}\{K_t, t\in T}, K_t being the concentration ellipsoid of X(t).X(t). The asymptotic behavior of the mathematical expectations Ef(Wn)Ef(W_n), where ff is an homogeneous functional is also studied.

Keywords

Cite

@article{arxiv.1004.4908,
  title  = {On convex hull of Gaussian samples},
  author = {Yu. Davydov},
  journal= {arXiv preprint arXiv:1004.4908},
  year   = {2015}
}

Comments

10 pages

R2 v1 2026-06-21T15:15:39.762Z