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We prove some sharp Hardy type inequalities related to the Dirac operator by elementary, direct methods. Some of these inequalities have been obtained previously using spectral information about the Dirac-Coulomb operator. Our results are…

Mathematical Physics · Physics 2007-05-23 J. Dolbeault , M. J. Esteban , M. Loss , L. Vega

In this work we prove sharp $L^p$ versions of multipolar Hardy inequalities in the case of a bipolar potential and $p\geq 2$, which were first developed in the case $p=2$ by Cazacu (CCM 2016) and Cazacu&Zuazua (Studies in phase space…

Analysis of PDEs · Mathematics 2022-11-22 Cristian Cazacu , Teodor Rugină

We discuss $(H_p,L_p)$ and $(H_p,\text{weak}-L_p)$ type inequalities of weighted maximal operators of $T$ means with respect to the Vilenkin systems with monotone coefficients, considered in \cite{tut4} and prove that these results are the…

Classical Analysis and ODEs · Mathematics 2022-07-13 Davit Baramidze

We study dilated holomorphic $L^p$ space of Gaussian measures over $\mathbb{C}^n$, denoted $\mathcal{H}_{p,\alpha}^n$ with variance scaling parameter $\alpha>0$. The duality relations $(\mathcal{H}_{p,\alpha}^n)^\ast \cong…

Functional Analysis · Mathematics 2014-08-26 William E. Gryc , Todd Kemp

We prove a sharp integral inequality that generalizes the well known Hardy type integral inequality for negative exponents. We also give sharp applications in two directions for Muckenhoupt weights on R. This work refines the results that…

Functional Analysis · Mathematics 2018-07-24 Eleftherios N. Nikolidakis , Theodoros Stavropoulos

We consider functions L_p-integrable with Jacobi weights on [-1,1] and prove Hardy--Littlewood type inequalities for fractional integrals. As applications, we obtain the sharp (L_p, L_q) Ulyanov-type inequalities for the Ditzian--Totik…

Functional Analysis · Mathematics 2016-01-06 Polina Glazyrina , Sergey Tikhonov

For indices p and q, 1 < p <= q < infini and a linear operator L satisfying some weak-type boundedness conditions on suitable function spaces, we give in the Dunkl setting sufficient conditions on nonnegative pairs of weight functions to…

Analysis of PDEs · Mathematics 2013-11-05 Chokri Abdelkefi , Mongi Rachdi

We revisit and extend a variety of inequalities related to power weighted Rellich and Hardy--Rellich inequalities, including an inequality due to Schmincke.

Analysis of PDEs · Mathematics 2024-09-30 Fritz Gesztesy , Michael M. H. Pang , Jake Parmentier , Jonathan Stanfill

We prove an appropriate sharp quantitative reverse H\"older inequality for the $C_p$ class of weights from which we obtain as a limiting case the sharp reverse H\"older inequality for the $A_\infty$ class of weights. We use this result to…

Classical Analysis and ODEs · Mathematics 2020-06-17 Javier Canto

We consider weighted $L^p$-Hardy inequalities involving the distance to the boundary of a domain in the $n$-dimensional Euclidean space with nonempty boundary. Using criticality theory, we give an alternative proof of the following result…

Analysis of PDEs · Mathematics 2021-01-21 Divya Goel , Yehuda Pinchover , Georgios Psaradakis

The goal of this paper is to present a Dunkl-Gamma type operator with the help of two-variable Hermite polynomials and to derive its approximating properties via the classical modulus of continuity, second modulus of continuity and Peetre's…

Classical Analysis and ODEs · Mathematics 2021-08-18 Bayram Çekim , Rabia Aktaş , Fatma Taşdelen

The rational Dunkl operators are commuting differential-reflection operators on the Euclidean space $R^d$ associated with a root system, that contain some non-local refection terms, and the associated Hardy space is defined by means of the…

Functional Analysis · Mathematics 2022-12-20 Jiaxi Jiu , Zhongkai Li

An inequality of Hardy type is established for quadratic forms involving Dirac operator and a weight $r^{-b}$ for functions in $\R^n$. The exact Hardy constant $c_b=c_b(n)$ is found and generalized minimizers are given. The constant $c_b$…

Analysis of PDEs · Mathematics 2008-12-16 Adimurthi , Kyril Tintarev

In this paper, we obtain the desired noncommutative maximal inequalities of the truncated Calder\'on-Zygmund operators of non-convolution type acting on operator-valued $L_p$-functions for all $1<p<\infty$, answering a question left open in…

Functional Analysis · Mathematics 2022-12-27 Guixiang Hong , Xudong Lai , Samya Kumar Ray , Bang Xu

The paper describes various approaches to the invertibility of Toeplitz plus Hankel operators in Hardy and $l^p$-spaces, integral and difference Wiener-Hopf plus Hankel operators and generalized Toeplitz plus Hankel operators. Special…

Functional Analysis · Mathematics 2020-03-23 Victor Didenko , Bernd Silbermann

Let $1\leq p <\infty$ and $0 < q,r < \infty$. We characterize the validity of the inequality for the composition of the Hardy operator, \begin{equation*} \bigg(\int_a^b \bigg(\int_a^x \bigg(\int_a^t f(s)ds \bigg)^q u(t) dt…

Analysis of PDEs · Mathematics 2024-06-19 Amiran Gogatishvili , Tuğçe Ünver

In this paper we prove sharp weighted Hardy-type inequalities on Carnot groups with the homogeneous norm $N=u^{1/(2-Q)}$ associated to Folland's fundamental solution $u$ for the sub-Laplacian $\Delta_{\mathbb{G}}$. We also prove uncertainty…

Functional Analysis · Mathematics 2007-05-23 Ismail Kombe

In this paper, we provide a sharp remainder term for the general weighted discrete $p$-Hardy inequality. By simply choosing weights and specifying $1<p<\infty$, we are able to recover the identity by Krej{\v{c}}i{\v{r}}{\'\i}k-\v{S}tampach…

Functional Analysis · Mathematics 2026-04-03 Nurgissa Yessirkegenov , Amir Zhangirbayev

In this paper, we improve the $L^p$-Rellich and Hardy-Rellich inequalities in the setting of radial Baouendi-Grushin vector fields. We establish an identity relating the subcritical and critical Hardy inequalities, thereby demonstrating…

Analysis of PDEs · Mathematics 2025-05-19 Avas Banerjee , Riju Basak , Prasun Roychowdhury

We prove sharp $L^p(w)$ norm inequalities for the intrinsic square function (introduced recently by M. Wilson) in terms of the $A_p$ characteristic of $w$ for all $1<p<\infty$. This implies the same sharp inequalities for the classical…

Classical Analysis and ODEs · Mathematics 2010-05-11 Andrei K. Lerner
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