English

An extension of Milman's reverse Brunn-Minkowski inequality

Functional Analysis 2016-09-06 v1

Abstract

The classical Brunn-Minkowski inequality states that for A1,A2RnA_1,A_2\subset\R^n compact, A1+A21/nA11/n+A21/n\eqno(1) |A_1+A_2|^{1/n}\ge |A_1|^{1/n}+|A_2|^{1/n}\eqno(1) where |\cdot| denotes the Lebesgue measure on Rn\R^n. In 1986 V. Milman {\bf [Mil 1]} discovered that if B1B_1 and B2B_2 are balls there is always a relative position of B1B_1 and B2B_2 for which a perturbed inverse of (1)(1) holds. More precisely:\lq\lq{\sl There exists a constant C>0C>0 such that for all nNn\in\N and any balls B1,B2RnB_1,B_2\subset\R^n we can find a linear transformation u ⁣:RnRnu\colon\R^n\to\R^n with det(u)=1|{\rm det}(u)|=1 and u(B1)+B21/nC(B11/n+B21/n)"|u(B_1)+B_2|^{1/n}\le C(|B_1|^{1/n}+|B_2|^{1/n})"} The aim of this paper is to extend this Milman's result to a larger class of sets.

Keywords

Cite

@article{arxiv.math/9501210,
  title  = {An extension of Milman's reverse Brunn-Minkowski inequality},
  author = {Jesus Bastero and J. Bernues and A. Pena},
  journal= {arXiv preprint arXiv:math/9501210},
  year   = {2016}
}