Gaussian mixtures: entropy and geometric inequalities

A Eskenazis, P Nayar, T Tkocz - The Annals of Probability, 2018 - JSTOR
A symmetric random variable is called a Gaussian mixture if it has the same distribution as
the product of two independent random variables, one being positive and the other a …

Threshold for the expected measure of random polytopes

S Brazitikos, A Giannopoulos, M Pafis - Mathematische Annalen, 2024 - Springer
Let μ be a log-concave probability measure on R n and for any N> n consider the random
polytope KN= conv {X 1,…, XN}, where X 1, X 2,… are independent random points in R n …

A Gaussian small deviation inequality for convex functions

G Paouris, P Valettas - The Annals of Probability, 2018 - JSTOR
Let Z be an n-dimensional Gaussian vector and let f: ℝ n→ ℝ be a convex function. We
prove that ℙ (f (Z)≤ 𝔼 f (Z)-t Var f (Z))≤ exp-ct 2, for all t> 1 where c> 0 is an absolute …

On the tightness of Gaussian concentration for convex functions

P Valettas - Journal d'Analyse Mathématique, 2019 - Springer
The concentration of measure phenomenon in Gauss' space states that every L-Lipschitz
map f on ℝ n satisfies γ _n\left (\left {x:| f (x)-M_f|\,\geqslant t\right\}\right)\,\leqslant 2 e^-t^ 2 2 …

A sharp lower-tail bound for Gaussian maxima with application to bootstrap methods in high dimensions

ME Lopes, J Yao - Electronic Journal of Statistics, 2022 - projecteuclid.org
Although there is an extensive literature on the maxima of Gaussian processes, there are
relatively few non-asymptotic bounds on their lower-tail probabilities. The aim of this paper is …

Dichotomies, structure, and concentration in normed spaces

G Paouris, P Valettas - Advances in Mathematics, 2018 - Elsevier
We use probabilistic, topological and combinatorial methods to establish the following
deviation inequality: For any normed space X=(R n,‖⋅‖) there exists an invertible linear …

Tail bounds for sums of independent two-sided exponential random variables

J Li, T Tkocz - High Dimensional Probability IX: The Ethereal Volume, 2023 - Springer
Tail Bounds for Sums of Independent Two-Sided Exponential Random Variables |
SpringerLink Skip to main content Advertisement SpringerLink Search Go to cart Search …

The variance of the ℓ_ {𝑝} ⁿ-norm of the Gaussian vector, and Dvoretzky's theorem

A Lytova, K Tikhomirov - St. Petersburg Mathematical Journal, 2019 - ams.org
Let $ n $ be a large integer, and let $ G $ be the standard Gaussian vector in $\mathbb {R}^
n $. Paouris, Valettas and Zinn (2015) showed that for all $ p\in [1, c\log n] $, the variance of …

A Gaussian small deviation inequality for convex functions

G Paouris, P Valettas - arXiv preprint arXiv:1611.01723, 2016 - arxiv.org
Let $ Z $ be an $ n $-dimensional Gaussian vector and let $ f:\mathbb R^ n\to\mathbb R $ be
a convex function. We show that: $$\mathbb P\left (f (Z)\leq\mathbb E f (Z)-t\sqrt {{\rm Var} f …

On a quantitative reversal of Alexandrov's inequality

G Paouris, P Pivovarov, P Valettas - Transactions of the American …, 2019 - ams.org
Alexandrov's inequalities imply that for any convex body $ A $, the sequence of intrinsic
volumes $ V_1 (A),\ldots, V_n (A) $ is non-increasing (when suitably normalized). Milman's …