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We show that the Caffarelli-Kohn-Nirenberg (CKN) inequality holds with a remainder term that is quartic in the distance to the set of optimizers for the full parameter range of the Felli-Schneider (FS) curve. The fourth power is best…

偏微分方程分析 · 数学 2024-03-01 Rupert L. Frank , Jonas W. Peteranderl

Using the Bers isomorphism theorem for Teichmuller spaces of punctured Riemann surfaces and some of their other complex geometric features, we prove a general theorem on maximization of homogeneous polynomial (in fact, more general…

复变函数 · 数学 2019-08-15 Samuel L. Krushkal

We investigate relations between symmetrizations of quasi-Banach function spaces and constructions such as Calderon-Lozanovskii spaces, pointwise product spaces and pointwise multipliers. We show that under reasonable assumptions the…

泛函分析 · 数学 2018-01-18 Pawel Kolwicz , Karol Lesnik , Lech Maligranda

In this paper, we study a symmetrization that preserves the mixed volume of the sublevel sets of a convex function, under which, a P\'olya-Szeg\H o type inequality holds. We refine this symmetrization to obtain a quantitative improvement of…

偏微分方程分析 · 数学 2025-01-24 Alba Lia Masiello , Francesco Salerno

Inequalities play an important role in pure and applied mathematics. In particular, Jensen's inequality, one of the most famous inequalities, plays a main role in the study of the existence and uniqueness of initial and boundary value…

经典分析与常微分方程 · 数学 2022-02-09 Yamilet Quintana , José M. Rodríguez , José M. Sigarreta Almira

Pisier's inequality is central in the study of normed spaces and has important applications in geometry. We provide an elementary proof of this inequality, which avoids some non-constructive steps from previous proofs. Our goal is to make…

泛函分析 · 数学 2020-09-24 Siddharth Iyer , Anup Rao , Victor Reis , Thomas Rothvoss , Amir Yehudayoff

In the present work, we propose to investigate the Fekete-Szeg\"o inequalities certain classes of analytic and bi-univalent functions defined by subordination. The results in the bounds of the third coefficient which improve many known…

复变函数 · 数学 2014-04-04 Halit Orhan , N. Magesh , V. K. Balaji

We investigate several functional and geometric inequalities on the hyperbolic space $\mathbb{H}^N$, with a primary emphasis on logarithmic Sobolev inequalities, Poincar\'e inequalities, and Beckner-type inequalities, all studied within the…

偏微分方程分析 · 数学 2026-02-17 Anh Xuan Do , Debdip Ganguly , Nguyen Lam , Guozhen Lu

In this paper, we develop a theory of symmetrization on the one dimensional integer lattice. More precisely, we associate a radially decreasing function $u^*$ with a function $u$ defined on the integers and prove the corresponding…

泛函分析 · 数学 2022-04-26 Shubham Gupta

In this paper, we establish a class of Stein-Weiss type inequality with partial variable weight functions on the upper half space using a weighted Hardy type inequality. Overcoming the impact of weighted functions, the existence of extremal…

偏微分方程分析 · 数学 2024-12-31 Jingbo Dou , Jingjing Ma

In this paper, we apply the so-called Alexandrov-Bakelman-Pucci (ABP) method to establish some geometric inequalities. We first prove a logarithmic Sobolev inequality for closed $n$-dimensional minimal submanifolds $\Sigma$ of $\mathbb…

微分几何 · 数学 2023-05-11 Doanh Pham

We present a uniqueness result in dimensions $2$ and $3$ for the inverse fixed angle scattering problem associated to the Schr\"odinger operator $-\Delta+q$, where $q$ is a small real valued potential with compact support in the Sobolev…

The main object of this paper is to obtain several symmetric properties of the q-Zeta type functions. As applications of these properties, we give some new interesting identities for the modified q-Genocchi polynomials. Finally, our…

数论 · 数学 2014-09-16 Serkan Araci , Armen Bagdasaryan , Cenap Ozel , H. M. Srivastava

We give a distribution-dependent concentration inequality for functions of independent variables. The result extends Bernstein's inequality from sums to more general functions, whose variation in any argument does not depend too much on the…

概率论 · 数学 2017-05-12 Andreas Maurer

In this paper, we derive the sharp improved versions of Bohr-type inequalities for the Ces\'aro operator acting on the class of bounded analytic functions defined on the unit disk $\D=\left\{z\in\C:\left|z\right|<1\right\}$. In order to…

复变函数 · 数学 2026-04-14 Vasudevarao Allu , Raju Biswas , Rajib Mandal

We improve the currently known thresholds for basisness of the family of periodically dilated p,q-sine functions. Our findings rely on a Beurling decomposition of the corresponding change of coordinates in terms of shift operators of…

泛函分析 · 数学 2015-06-19 Lyonell Boulton , Gabriel Lord

In this paper we study spectral function for a nonsymmetric differential operator on the half line. Two cases of the coefficient matrix are considered, and for each case we prove by Marchenko's method that, to the boundary value problem,…

经典分析与常微分方程 · 数学 2015-01-05 Wuqing Ning

This paper introduces statistical order convergence and its pointwise variant for sequences of order bounded operators between Riesz spaces. We establish fundamental properties: uniqueness of the limit, stability under lattice operations,…

泛函分析 · 数学 2025-12-30 Abdullah Aydın , Erdal Bayram , İshak Aydın

We study the $2k$-th moment at the central point of the family of symmetric square $L$-functions attached to holomorphic Hecke cusp forms of level one, weight $\kappa$. We establish sharp lower bounds for all real $k \geq 1/2$…

数论 · 数学 2022-10-20 Peng Gao

It is known that functions in a Sobolev space with critical exponent embed into the space of functions of bounded mean oscillation, and therefore satisfy the John-Nirenberg inequality and a corresponding exponential integrability estimate.…

泛函分析 · 数学 2020-07-10 Ángel D. Martínez , Daniel Spector