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We aim to study the classical Rosenthal-Szasz inequality for a plane whose geometry is given by a norm. This inequality states that the bodies of constant width have the largest perimeter among all planar convex bodies of given diameter. In…

Metric Geometry · Mathematics 2018-05-29 Vitor Balestro , Horst Martini

The Riesz-Sobolev inequality provides an upper bound, in integral form, for the convolution of indicator functions of subsets of Euclidean space. We formulate and prove a sharper form of the inequality. This can be equivalently phrased as a…

Classical Analysis and ODEs · Mathematics 2017-06-08 Michael Christ

We show that Bonnesen's isoperimetic defect has a systolic analog for Loewner's torus inequality. The isosystolic defect is expressed in terms of the probabilistic variance of the conformal factor of the metric g with respect to the flat…

Differential Geometry · Mathematics 2009-02-12 Charles Horowitz , Karin Usadi Katz , Mikhail G. Katz

Let $P$ be orthogonal projection on B-splines of degree $r-1$ with equally spaced knots. Sweldens and Piessens proved that $P(x^r)-x^r$ is Bernoulli polynomial. We generalize Sweldens ans Piessens's result for box-splines. It gives the…

Classical Analysis and ODEs · Mathematics 2025-01-06 M. Beśka , K. Dziedziul

We obtain new oscillation inequalities in metric spaces in terms of the Peetre $K-$functional and the isoperimetric profile. Applications provided include a detailed study of Fractional Sobolev inequalities and the Morrey-Sobolev embedding…

Functional Analysis · Mathematics 2014-04-01 Joaquim Martin , Mario Milman

This work is concerned with a P\'olya-Szeg\"o type inequality for anisotropic functionals of Sobolev functions. The relevant inequality entails a double-symmetrization involving both trial functions and functionals. A new approach that…

Functional Analysis · Mathematics 2025-01-03 Gabriele Bianchi , Andrea Cianchi , Paolo Gronchi

We discuss an analytic form of the dilation inequality for symmetric convex sets in Euclidean spaces, which is a counterpart of analytic aspects of Cheeger's isoperimetric inequality. We show that the dilation inequality for symmetric…

Metric Geometry · Mathematics 2023-05-15 Hiroshi Tsuji

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

Given a probability measure $\mu$ supported on a convex subset $\Omega$ of Euclidean space $(\mathbb{R}^d,g_0)$, we are interested in obtaining Poincar\'e and log-Sobolev type inequalities on $(\Omega,g_0,\mu)$. To this end, we change the…

Functional Analysis · Mathematics 2016-07-01 Alexander V. Kolesnikov , Emanuel Milman

This paper deals with the famous isoperimetric inequality. In a first part, we give some new functional form of the isoperimetric inequality, and in a second part, we give a quantitative form with a remainder term involving Wasserstein…

Functional Analysis · Mathematics 2017-01-04 Erik Thomas

The Hessian Sobolev inequality of X.-J. Wang, and the Hessian Poincar\'e inequalities of Trudinger and Wang are fundamental to differential and conformal geometry, and geometric PDE. These remarkable inequalities were originally established…

Analysis of PDEs · Mathematics 2020-11-10 Igor E. Verbitsky

In this paper we prove different functional inequalities extending the classical Rogers-Shephard inequalities for convex bodies. The original inequalities provide an optimal relation between the volume of a convex body and the volume of…

Functional Analysis · Mathematics 2016-09-14 David Alonso-Gutiérrez , Bernardo González Merino , C. Hugo Jiménez , Rafael Villa

We generalize the hyperplane inequality in dimensions up to 4 to the setting of arbitrary measures in place of the volume. To prove this generalization we establish stability in the affirmative part of the solution to the Busemann-Petty…

Metric Geometry · Mathematics 2011-02-22 Alexander Koldobsky

A method for proving symmetrization inequalities for some elliptic p.d.e.'s on manifolds equipped with appropriate isoperimetric inequalities is outlined. The method is based on a modification of an approach of Baernstein. The question of…

Analysis of PDEs · Mathematics 2007-05-23 Alexander R. Pruss

The classical Petty projection inequality is an affine isoperimetric inequality which constitutes a cornerstone in the affine geometry of convex bodies. By extending the polar projection body to an inter-dimensional operator, Petty's…

Metric Geometry · Mathematics 2025-08-29 Francisco Marín Sola

We prove a new family of inequalities, which compare the integral of a geometric convolution of non-negative functions with the integrals of the original functions. For classical inf-convolution, this type of inequality is called the…

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

In this paper we establish Minkowski inequality and Brunn--Minkowski inequality for $p$-quermassintegral differences of convex bodies. Further, we give Minkowski inequality and Brunn--Minkowski inequality for quermassintegral differences of…

Metric Geometry · Mathematics 2007-05-23 Zhao Changjian , Wingsum Cheung

We generalize Brendle's geometric inequality considered in \cite{B} to static manifolds. The inequality bounds the integral of inverse mean curvature of an embedded mean-convex hypersurface by geometric data of the horizon. As a…

Differential Geometry · Mathematics 2018-11-07 Xiaodong Wang , Ye-Kai Wang

The inequality of Berwald is a reverse-H\"older like inequality for the $p$th average, $p\in (-1,\infty),$ of a non-negative, concave function over a convex body in $\mathbb{R}^n.$ We prove Berwald's inequality for averages of functions…

Metric Geometry · Mathematics 2025-06-04 Dylan Langharst , Eli Putterman

Some geometric properties of a normalized hyper-Bessel functions are investigated. Especially we focus on the radii of starlikeness, convexity, and uniform convexity of hyper-Bessel functions and we show that the obtained radii satisfy some…

Complex Variables · Mathematics 2021-01-19 İbrahim Aktaş , Árpád Baricz , Sanjeev Singh