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Firstly, this paper establishes useful forms of the remainder term of Hardy-type inequalities on general domains where the weights are functions of the distance to the boundary. For weakly mean convex domains we use the resulting identities…

Analysis of PDEs · Mathematics 2023-10-31 Joshua Flynn , Nguyen Lam , Guozhen Lu

We prove $L^p$-Hardy inequalities with distance to the boundary for domains in the Heisenberg group ${\mathbb{H}}^n$, $n\geq 1$. Our results are based on a certain geometric condition. This is first implemented for the Euclidean distance in…

Analysis of PDEs · Mathematics 2026-03-24 Gerassimos Barbatis , Marianna Chatzakou , Achilles Tertikas

We prove two improved versions of the Hardy-Rellich inequality for the polyharmonic operator $(-\Delta)^m$ involving the distance to the boundary. The first involves an infinite series improvement using logarithmic functions, while the…

Analysis of PDEs · Mathematics 2007-05-23 G. Barbatis

We consider the $L^p$ Hardy inequality involving the distance to the boundary for a domain in the $n$-dimensional Euclidean space. We study the dependence on $p$ of the corresponding best constant and we prove monotonicity, continuity and…

Analysis of PDEs · Mathematics 2015-10-27 Gerassimos Barbatis , Pier Domenico Lamberti

We prove a sharp $L^p$ weighted Hardy inequality involving boundary distance $\delta$ for any domain $\Omega\subsetneq \mathbb R^n$. The inequality may be improved substantially under the additional assumption that $-\log \delta$ is…

Analysis of PDEs · Mathematics 2020-07-21 Bo-Yong Chen

We study the Hardy inequality when the singularity is placed on the boundary of a bounded domain in $\mathbb{R}^n$ that satisfies both an interior and exterior ball condition at the singularity. We obtain the sharp Hardy constant $n^2/4$ in…

Analysis of PDEs · Mathematics 2018-04-06 Gerassimos Barbatis , Stathis Filippas , Achilles Tertikas

In this paper, we obtained the Dunkl analogy of classical Lp Hardy inequality for $p > N + 2\gamma$ with sharp constant $\left(\frac{p-N-2\gamma}{p}\right)^{p}$, where $2\gamma$ is the degree of weight function associated with Dunkl…

Analysis of PDEs · Mathematics 2020-01-16 Li Tang , Haiting Chen , Shoufeng Shen , Yongyang Jin

For a bounded convex domain \Omega in R^N we prove refined Hardy inequalities that involve the Hardy potential corresponding to the distance to the boundary of \Omega, the volume of $\Omega$, as well as a finite number of sharp logarithmic…

Analysis of PDEs · Mathematics 2007-05-23 G. Barbatis , S. Filippas , A. Tertikas

In the present paper we shall establish n-dimensional Hardy's inequalities with non-doubling weight functions of the distance to the boundary, where the boundary is a $C^2$ class bounded domain of $R^N$. This work is essentially based on…

Analysis of PDEs · Mathematics 2022-06-28 Toshio Horiuchi

The classical Rellich inequalities imply that the $L^2$-norms of the normal and tangential derivatives of a harmonic function are equivalent. In this note, we prove several refined inequalities, which make sense even if the domain is not…

Analysis of PDEs · Mathematics 2022-09-20 Siddhant Agrawal , Thomas Alazard

This is the first part of our research on certain sharp Hardy-Sobolev inequalities and the related elliptic equations. In this part we shall establish some sharp weighted Hardy-Sobolev inequalities whose weights are distance functions to…

Analysis of PDEs · Mathematics 2022-06-30 Lei Wang , Meijun Zhu

In this paper, we prove that the distance function of an open connected set in $\mathbb R^{n+1}$ with a $C^{2}$ boundary is superharmonic in the distribution sense if and only if the boundary is {\em weakly mean convex}. We then prove that…

Analysis of PDEs · Mathematics 2011-06-03 Roger T. Lewis , Junfang Li , Yanyan Li

We study Rellich inequalities associated to higher-order elliptic operators in the Euclidean space. The inequalities are expressed in terms of an associated Finsler metric. In the case of half-spaces we obtain the sharp constant while for a…

Analysis of PDEs · Mathematics 2021-08-06 Gerassimos Barbatis , Miltiadis Paschalis

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

We prove some sharp Hardy inequalities for domains with a spherical symmetry. In particular, we prove an inequality for domains of the unit $n$-dimensional sphere with a point singularity, and an inequality for functions defined on the…

Analysis of PDEs · Mathematics 2008-07-30 Francesco Chiacchio , Tonia Ricciardi

In this paper we prove sharp multipolar Hardy-type inequalities in the Riemannian $L^p-$setting for $p\geq 2$ using the method of super-solutions and fundamental results from comparison theory on manifolds, thus generalizing previous…

Analysis of PDEs · Mathematics 2025-03-07 Cristian Ciulică , Teodor Rugină

Let $\O$ be a smooth bounded domain in $\R^N$ with $N\ge 1$. In this paper we study the Hardy-Poincar\'e inequalities with weight function singular at the boundary of $\O$. In particular we give sufficient conditions so that the best…

Analysis of PDEs · Mathematics 2010-09-17 Mouhamed Moustapha Fall

We consider a general class of sharp $L^p$ Hardy inequalities in $\R^N$ involving distance from a surface of general codimension $1\leq k\leq N$. We show that we can succesively improve them by adding to the right hand side a lower order…

Analysis of PDEs · Mathematics 2007-05-23 G. Barbatis , S. Filippas , A. Tertikas

In this paper, we establish discrete Hardy-Rellich inequalities on $\mathbb{N}$ with $\Delta^\frac{\ell}{2}$ and optimal constants, for any $\ell \geq 1$. As far as we are aware, these sharp inequalities are new for $\ell \geq 3$. Our…

Analysis of PDEs · Mathematics 2023-12-27 Xia Huang , Dong Ye

We study the $P_1$ finite element approximation of the best constant in the classical Hardy inequality over bounded domains containing the origin in $\mathbb{R}^N$, for $N \geq 3$. Despite the fact that this constant is not attained in the…

Numerical Analysis · Mathematics 2025-10-06 Liviu I. Ignat , Enrique Zuazua
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