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Related papers: A note on Santal\'{o} inequality for the polarity …

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Using a natural representation of a $1/s$-concave function on $\mathbb{R}^d$ as a convex set in $\mathbb{R}^{d+1},$ we derive a simple formula for the integral of its $s$-polar. This leads to convexity properties of the integral of the…

Functional Analysis · Mathematics 2023-10-06 Grigory Ivanov , Elisabeth M. Werner

In this paper we deal with generalizations of the Mahler volume product for log-concave functions. We show that the polarity transform $\mathcal A$ can be rescaled so that the Mahler product it induces has upper and lower bounds of the same…

Functional Analysis · Mathematics 2025-07-31 Shoni Gilboa , Alexander Segal , Boaz A. Slomka

We establish new functional versions of the Blaschke-Santal\'o inequality on the volume product of a convex body which generalize to the non-symmetric setting an inequality of K. Ball and we give a simple proof of the case of equality. As a…

Functional Analysis · Mathematics 2007-05-23 Matthieu Fradelizi , Mathieu Meyer

We prove that the reciprocal of the volume of the polar bodies, about the Santal\'o point, of a {\em shadow system} of convex bodies $K_t$, is a convex function of $t$. Thus extending to the non-symmetric case a result of Campi and Gronchi.…

Metric Geometry · Mathematics 2008-07-14 Mathieu Meyer , Shlomo Reisner

We discuss a topological structure on families of convex functions and then apply it to show the existence of extrimizers for the functional Santal\'{o} inequality with respect to polar transform and its reverse.

Functional Analysis · Mathematics 2020-02-10 Ben Li

We will prove a reverse Rogers-Shephard inequality for log-concave functions. In some particular cases, the method used for general log-concave functions can be slightly improved, allowing us to prove volume estimates for polars of…

Metric Geometry · Mathematics 2017-05-18 David Alonso-Gutiérrez

This paper deals with an analog of the Mahler volume product related to the ${\cal J}$ transform acting in the class of geometric convex functions ${\rm{Cvx}}_0({\mathbb R}^n)$. We provide asymptotically sharp bounds for the quantity…

Functional Analysis · Mathematics 2019-10-24 Dan I. Florentin , Alexander Segal

We establishe an affine Hardy-Littlewood-Sobolev inequality concerning two different functions which is stronger than the classical Hardy-Littlewood-Sobolev inequality. Furthermore, we also prove reverse inequalities for the new…

Functional Analysis · Mathematics 2025-08-05 Youjiang Lin , Jinghong Zhou , Jiaming Lan

In this paper, we present a simple proof of a recent result of the second author which establishes that functional inverse-Santal{\'o} inequalities follow from Entropy-Transport inequalities. Then, using transport arguments together with…

Functional Analysis · Mathematics 2021-09-10 Matthieu Fradelizi , Nathael Gozlan , Simon Zugmeyer

In this note prove the following Berwald-type inequality, showing that for any integrable log-concave function $f:\mathbb R^n\rightarrow[0,\infty)$ and any concave function $h:L\rightarrow\mathbb [0,\infty)$, where $L$ is the epigraph of…

Functional Analysis · Mathematics 2019-08-06 David Alonso-Gutiérrez , Julio Bernués , Bernardo González Merino

Nakamura and Tsuji recently obtained an integral inequality involving a Laplace transform of even functions that implies, at the limit, the Blaschke-Santal\'o inequality in its functional form. Inspired by their method, based on the…

Functional Analysis · Mathematics 2025-02-06 Dario Cordero-Erausquin , Matthieu Fradelizi , Dylan Langharst

In this paper, we obtain the reversed Hardy-Littlewood-Sobolev inequality with vertical weights on the upper half space and discuss the extremal functions. We show that the sharp constants in this inequality are attained by introducing a…

Analysis of PDEs · Mathematics 2023-11-08 Jingbo Dou , Yunyun Hu , Jingjing Ma

The classical sharp Hardy-Littlewood-Sobolev inequality states that, for $1<p, t<\infty$ and $0<\lambda=n-\alpha <n$ with $ 1/p +1 /t+ \lambda /n=2$, there is a best constant $N(n,\lambda,p)>0$, such that $$ |\int_{\mathbb{R}^n}…

Analysis of PDEs · Mathematics 2014-07-11 Jingbo Dou , Meijun Zhu

We prove that the functional volume product for even functions is monotone increasing along the Fokker--Planck heat flow. This in particular yields a new proof of the functional Blaschke--Santal\'{o} inequality by K. Ball and also…

Functional Analysis · Mathematics 2024-03-21 Shohei Nakamura , Hiroshi Tsuji

For a real-valued non-negative and log-concave function we introduce a notion of difference function; the difference function represents a functional analog on the difference body of a convex body. We prove a sharp inequality which bounds…

Metric Geometry · Mathematics 2007-05-23 Andrea Colesanti

We prove new entropy inequalities for log concave and s-concave functions that strengthen and generalize recently established reverse log Sobolev and Poincare inequalities for such functions. This leads naturally to the concept of…

Functional Analysis · Mathematics 2013-07-23 Umut Caglar , Elisabeth M. Werner

An inequality of Brascamp and Lieb provides a bound on the covariance of two functions with respect to log-concave measures. The bound estimates the covariance by the product of the $L^2$ norms of the gradients of the functions, where the…

Functional Analysis · Mathematics 2011-10-25 Eric A. Carlen , Dario Cordero-Erausquin , Elliott H. Lieb

We prove two inequalities for the Mittag-Leffler function, namely that the function $\log E_\alpha(x^\alpha)$ is sub-additive for $0<\alpha<1,$ and super-additive for $\alpha>1.$ These assertions follow from two new binomial inequalities,…

Classical Analysis and ODEs · Mathematics 2021-12-16 Stefan Gerhold , Thomas Simon

The Blaschke-Santal\'o inequality states that the volume product $|K| \cdot |K^{o}|$ of a symmetric convex body $K \subset \mathbb{R}^n$ is maximized by the standard Euclidean unit-ball. Cordero-Erausquin asked whether the inequality…

Functional Analysis · Mathematics 2025-10-09 Emanuel Milman , Amir Yehudayoff

It is a classical result that every subharmonic function, defined and ${\mathcal{L}}^p$-integrable for some $p$, $0<p<+\infty$, on the unit disk $\mathbb{D}$ of the complex plane ${\mathbb{C}}$ is for almost all $\theta$ of the form $o((1-|…

Analysis of PDEs · Mathematics 2009-10-27 Juhani Riihentaus
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