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In this short article we obtain some necessary conditions for a so-called fractional Hardy-Sobolev's inequalities in multidimensional case. We also give some examples to show the sharpness of these inequalities.

Functional Analysis · Mathematics 2011-08-08 E. Ostrovsky , L. Sirota

We prove an optimal Hardy inequality for the fractional Laplacian on the half-space.

Analysis of PDEs · Mathematics 2008-07-14 Krzysztof Bogdan , Bartłomiej Dyda

We give a simple proof of a recently result concerning Hardy $q$-inequalities.

Classical Analysis and ODEs · Mathematics 2014-12-18 Peng Gao

We establish a novel improvement of the classical discrete Hardy inequality, which gives the discrete version of a recent (continuous) inequality of Frank, Laptev, and Weidl. Our arguments build on certain weighted inequalities based on…

Functional Analysis · Mathematics 2024-07-09 Prasun Roychowdhury , Durvudkhan Suragan

We prove an inequality of Hardy type for functions in Triebel-Lizorkin spaces. The distance involved is being measured to a given Ahlfors d-regular set in R^n, with n-1<d<n. As an application of the Hardy inequality, we consider boundedness…

Classical Analysis and ODEs · Mathematics 2012-09-27 Lizaveta Ihnatsyeva , Antti V. Vähäkangas

We obtain the sharp constant for the Hardy-Sobolev inequality involving the distance to the origin. This inequality is equivalent to a limiting Caffarelli-Kohn-Nirenberg inequality. In three dimensions, in certain cases the sharp constant…

Analysis of PDEs · Mathematics 2009-11-06 Adimurthi , Stathis Filippas , Achilles Tertikas

We prove a sharp Hardy inequality for fractional integrals for functions that are supported on a general domain. The constant is the same as the one for the half-space and hence our result settles a recent conjecture of Bogdan and Dyda.

Analysis of PDEs · Mathematics 2010-02-22 Michael Loss , Craig Sloane

We prove a Hardy inequality on convex sets, for fractional Sobolev-Slobodecki\u{\i} spaces of order $(s,p)$. The proof is based on the fact that in a convex set the distance from the boundary is a superharmonic function, in a suitable…

Analysis of PDEs · Mathematics 2018-06-12 Lorenzo Brasco , Eleonora Cinti

For a k-flat F inside a locally compact CAT(0)-space X, we identify various conditions that ensure that F bounds a (k+1)-dimensional half flat in X. Our conditions are formulated in terms of the ultralimit of X. As applications, we obtain…

Metric Geometry · Mathematics 2010-09-17 S. Francaviglia , J. -F. Lafont

In this paper, we prove capacitary versions of the fractional Sobolev--Poincar\'e inequalities. We characterize localized variant of the boundary fractional Sobolev--Poincar\'e inequalities through uniform fatness condition of the domain in…

Analysis of PDEs · Mathematics 2024-08-15 Firoj Sk

In this paper, we introduce formulations of the Trotter Kato theorem for approximation of bi continuous semigroups that provide a useful framework whenever convergence of numerical approximations to solutions of PDEs are studied with…

Numerical Analysis · Mathematics 2019-11-22 Abdulhameed Qahtan Abbood Altai

We prove Hardy-type inequalities for a fractional Dunkl--Hermite operator which incidentally give Hardy inequalities for the fractional harmonic oscillator as well. The idea is to use $h$-harmonic expansions to reduce the problem in the…

Classical Analysis and ODEs · Mathematics 2016-09-06 Ó. Ciaurri , L. Roncal , S. Thangavelu

We establish improved versions of the Hardy and Caffarelli-Kohn-Nirenberg inequalities by replacing the standard Dirichlet energy with some nonlocal nonconvex functionals which have been involved in estimates for the topological degree of…

Classical Analysis and ODEs · Mathematics 2018-01-22 Hoai-Minh Nguyen , Marco Squassina

In this article we prove both norm and modular Hardy inequalities for a class functions in one-dimensional fractional Orlicz-Sobolev spaces.

Analysis of PDEs · Mathematics 2020-09-15 Ariel Salort

We find sharp constants in fractional Hardy inequalities for weighted Triebel--Lizorkin seminorms on the whole space and half-spaces. Our results generalize recently obtained weighted fractional Hardy inequalities for Gagliardo seminorms,…

Analysis of PDEs · Mathematics 2025-12-23 Michał Kijaczko

We present simple proofs of a discrete fractional and non-fractional Hardy inequality, Our constants are explicit, but not optimal. In the class of power weights, we get a complete picture of when the non-fractional Hardy inequality holds,…

Functional Analysis · Mathematics 2025-06-18 Bartłomiej Dyda

We give improvements and generalizations of both the classical Hardy inequality and the geometric Hardy inequality based on the divergence theorem. Especially, our improved Hardy type inequality derives both two Hardy type inequalities with…

Analysis of PDEs · Mathematics 2021-04-06 Megumi Sano

We prove a sharp isoperimetric inequality for measured Finsler manifolds having non-negative Ricci curvature and Euclidean volume growth. We also prove a rigidity result for this inequality, under the additional hypotheses of boundedness of…

Differential Geometry · Mathematics 2024-06-05 Davide Manini

In this paper we study the extension problem for the sublaplacian on a $H$-type group and use the solutions to prove trace Hardy and Hardy inequalities for fractional powers of the sublaplacian.

Analysis of PDEs · Mathematics 2017-08-31 L. Roncal , S. Thangavelu

We present a unified approach to obtain Hardy-type inequalities in the context of nilpotent Lie groups with sharp constants. The unified methodology employed herein allows for exploration of the sharp Hardy inequalities on various Lie group…

Functional Analysis · Mathematics 2023-08-04 Durvudkhan Suragan , Nurgissa Yessirkegenov