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We prove a two dimensional Holder and reverse-Holder inequality on time scales via the diamond-alpha integral. Other integral inequalities are established as well, which have as corollaries some recent proved Hardy-type inequalities on time…

Classical Analysis and ODEs · Mathematics 2010-03-16 Moulay Rchid Sidi Ammi , Delfim F. M. Torres

In this note we produce generalized versions of the classical inequalities of Hardy and of Hilbert and we establish their equivalence. Our methods rely on the H^1-BMOA duality. We produce a class of examples to establish that the…

Functional Analysis · Mathematics 2015-02-23 Vern I. Paulsen , Dinesh Singh

The Hardy--Littlewood inequalities for multilinear forms on sequence spaces state that for all positive integers $m,n\geq2$ and all $m$-linear forms $T:\ell_{p_{1}}^{n}\times\cdots\times\ell_{p_{m}}^{n}\rightarrow\mathbb{K}$…

Functional Analysis · Mathematics 2018-03-06 Gustavo Araújo , Kleber Câmara

The class of the hypercomplex pseudo-Hermitian manifolds is considered. The flatness of the considered manifolds with the 3 parallel complex structures is proved. Conformal transformations of the metrics are introduced. The conformal…

Differential Geometry · Mathematics 2012-03-27 Kostadin Gribachev , Mancho Manev , Stancho Dimiev

We present an extension of the Hardy--Littlewood inequality for multilinear forms. More precisely, let $\mathbb{K}$ be the real or complex scalar field and $m,k$ be positive integers with $m\geq k\,$ and $n_{1},\dots ,n_{k}$ be positive…

Functional Analysis · Mathematics 2016-04-07 Tony Nogueira , Pilar Rueda

The aim of this paper is to obtain new Hardy inequalities with double singular weights - at an interior point and on the boundary of the domain. These inequalities give us the possibility to derive estimates from below of the first…

Analysis of PDEs · Mathematics 2020-10-02 Nikolai Kutev , Tsviatko Rangelov

Based on a new idea of factorization, we prove an improved discrete Rellich inequality and discuss its optimality. We also give a conjecture on improved higher order discrete Hardy-like inequalities and formulate an open problem for the…

Spectral Theory · Mathematics 2022-06-23 Borbala Gerhat , David Krejcirik , Frantisek Stampach

We study the Hardy type inequalities in the framework of equalities. We present equalities which immediately imply Hardy type inequalities by dropping the remainder term. Simultaneously we give a characterization of the class of functions…

Analysis of PDEs · Mathematics 2016-11-14 Shuji Machihara , Tohru Ozawa , Hidemitsu Wadade

In this note we investigate the multi-parameter Potential Theory on the weighted $d$-tree (Cartesian product of several copies of uniform dyadic tree), which is connected to the discrete models of weighted Dirichlet spaces on the polydisc.…

Complex Variables · Mathematics 2018-11-06 Nicola Arcozzi , Pavel Mozolyako , Karl-Mikael Perfekt

The Hardy-Littlewood inequalities for $m$-linear forms on $\ell_{p}$ spaces are stated for $p>m$. In this paper, among other results, we investigate similar results for $1\leq p\leq m.$ Let $\mathbb{K}$ be $% \mathbb{R}$ or $\mathbb{C}$ and…

Functional Analysis · Mathematics 2015-10-01 Gustavo Araujo , Daniel Pellegrino

We use the Morrey norm estimate for the imaginary power of the Laplacian to prove an interpolation inequality for the fractional power of the Laplacian on Morrey spaces. We then prove a Hardy-type inequality and use it together with the…

Analysis of PDEs · Mathematics 2021-05-13 Hendra Gunawan , Denny Ivanal Hakim , Eiichi Nakai , Yoshihiro Sawano

We prove the Heisenberg-Pauli-Weyl inequality, Hardy-Sobolev inequality, and Caffarelli-Kohn-Nirenberg (CKN) inequality on manifolds with nonnegative Ricci curvature and Euclidean volume growth, of dimension n>=3.

Differential Geometry · Mathematics 2024-03-05 Yuxin Dong , Hezi Lin , Lingen Lu

We give sharp remainder terms of $L^{p}$ and weighted Hardy and Rellich inequalities on one of most general subclasses of nilpotent Lie groups, namely the class of homogeneous groups. As consequences, we obtain analogues of the generalised…

Classical Analysis and ODEs · Mathematics 2017-08-14 Michael Ruzhansky , Durvudkhan Suragan

We prove that a pointwise fractional Hardy inequality implies a fractional Hardy inequality, defined via a Gagliardo-type seminorm. The proof consists of two main parts. The first one is to characterize the pointwise fractional Hardy…

Classical Analysis and ODEs · Mathematics 2024-04-09 Lizaveta Ihnatsyeva , Kaushik Mohanta , Antti V. Vähäkangas

A method of proving Hardy's type inequality for orthogonal expansions is presented in a rather general setting. Then sharp multi-dimensional Hardy's inequality associated with the Laguerre functions of convolution type is proved for type…

Classical Analysis and ODEs · Mathematics 2018-10-19 Paweł Plewa

We show that allowing magnetic fields to be complex-valued leads to an improvement in the magnetic Hardy-type inequality due to Laptev and Weidl. The proof is based on the study of momenta on the circle with complex magnetic fields, which…

Mathematical Physics · Physics 2022-08-22 David Krejcirik

The paper is devoted to weighted $L^p$-Hardy inequalities with best constants on Finsler metric measure manifolds. There are two major ingredients. The first, which is the main part of this paper, is the Hardy inequalities concerned with…

Differential Geometry · Mathematics 2019-07-09 Wei Zhao

In this paper we present a unified simple approach to anisotropic Hardy inequalities in various settings. We consider Hardy inequalities which involve a Finsler distance from a point or from the boundary of a domain. The sharpness and the…

Analysis of PDEs · Mathematics 2018-06-22 A. Mercaldo , M. Sano , F. Takahashi

We show that the polynomial decay rate of the heat semigroup of the Dirichlet Laplacian in curved planar wedges equals the sum of the usual dimensional decay rate and a multiple of the reciprocal value of the opening angle. To prove the…

Spectral Theory · Mathematics 2016-04-27 David Krejcirik

In this paper we establish the subelliptic Picone type identities. As consequences, we obtain Hardy and Rellich type inequalities for anisotropic p-sub- Laplacians which are operators of the form $$ \mathcal{L}_p f :=…

Analysis of PDEs · Mathematics 2020-05-07 Michael Ruzhansky , Bolys Sabitbek , Durvudkhan Suragan
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