An almost constant lower bound of the isoperimetric coefficient in the KLS conjecture

Y Chen - Geometric and Functional Analysis, 2021‏ - Springer
We prove an almost constant lower bound of the isoperimetric coefficient in the KLS
conjecture. The lower bound has the dimension dependency d^-o_d (1) d-od (1). When the …

Orlicz projection bodies

E Lutwak, D Yang, G Zhang - Advances in Mathematics, 2010‏ - Elsevier
Minkowski's projection bodies have evolved into Lp projection bodies and their asymmetric
analogs. These all turn out to be part of a far larger class of Orlicz projection bodies. The …

On the role of convexity in isoperimetry, spectral gap and concentration

E Milman - Inventiones mathematicae, 2009‏ - Springer
We show that for convex domains in Euclidean space, Cheeger's isoperimetric inequality,
spectral gap of the Neumann Laplacian, exponential concentration of Lipschitz functions …

[كتاب][B] Local 𝐿^{𝑝}-Brunn–Minkowski inequalities for 𝑝< 1

A Kolesnikov, E Milman - 2022‏ - ams.org
Abstract The $ L^ p $-Brunn–Minkowski theory for $ p\geq 1$, proposed by Firey and
developed by Lutwak in the 90's, replaces the Minkowski addition of convex sets by its $ L …

Robust covariance estimation under norm equivalence

S Mendelson, N Zhivotovskiy - 2020‏ - projecteuclid.org
Let X be a centered random vector taking values in R^d and let Σ=E(X⊗X) be its covariance
matrix. We show that if X satisfies an L_4-L_2 norm equivalence (sometimes referred to as …

Relative entropy of cone measures and centroid bodies

G Paouris, EM Werner - arxiv preprint arxiv:0909.4361, 2009‏ - arxiv.org
Let $ K $ be a convex body in $\mathbb R^ n $. We introduce a new affine invariant, which
we call $\Omega_K $, that can be found in three different ways: as a limit of normalized …

Sparsifying sums of norms

A Jambulapati, JR Lee, YP Liu… - 2023 IEEE 64th Annual …, 2023‏ - ieeexplore.ieee.org
For any norms N_1,...,N_m on R^n and N(x):=N_1(x)+⋯+N_m(x), we show there is a
sparsified norm ̃N(x)=w_1N_1(x)+⋯+w_mN_m(x) such that |N(x)-̃N(x)|\leqslantεN(x) for all …

Efficient certificates of anti-concentration beyond gaussians

A Bakshi, PK Kothari, G Rajendran… - 2024 IEEE 65th …, 2024‏ - ieeexplore.ieee.org
A set of high dimensional points X ={x_1,x_2,...,x_n\}⊆R^d in isotropic position is said to be
δ-anti concentrated if for every direction v, the fraction of points in X satisfying …

Centroid bodies and the logarithmic Laplace transform–a unified approach

B Klartag, E Milman - Journal of Functional Analysis, 2012‏ - Elsevier
We unify and slightly improve several bounds on the isotropic constant of high-dimensional
convex bodies; in particular, a linear dependence on the bodyʼs ψ2 constant is obtained …

A characterization of dimension free concentration in terms of transportation inequalities

N Gozlan - 2009‏ - projecteuclid.org
The aim of this paper is to give a characterization of the dimension free concentration of
measure phenomenon in terms of transportation-cost inequalities. We apply this theorem to …