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In this paper we obtain quite general and definitive forms for Hardy-Littlewood type inequalities. Moreover, when restricted to the original particular cases, our approach provides much simpler and straightforward proofs and we are able to…

Functional Analysis · Mathematics 2014-06-24 Nacib Albuquerque , Frédéric Bayart , Daniel Pellegrino , Juan B. Seoane-Sepúlveda

This paper defines local weighted Hardy spaces with variable exponent. Local Hardy spaces permit atomic decomposition, which is one of the main themes in this paper. A consequence is that the atomic decomposition is obtained for the…

Functional Analysis · Mathematics 2022-06-14 Mitsuo Izuki , Toru Nogayama , Takahiro Noi , Yoshihiro Sawano

We study the quadratic form associated to the kinetic energy operator in the presence of an external magnetic field in d = 3. We show that if the radial component of the magnetic field does not vanish identically, then the classical lower…

Spectral Theory · Mathematics 2015-06-12 Tomas Ekholm , Fabian Portmann

We construct optimal Hardy weights to subcritical energy functionals $h$ associated with quasilinear Schr\"odinger operators on locally finite graphs. Here, optimality means that the weight $w$ is the largest possible with respect to a…

Analysis of PDEs · Mathematics 2024-06-26 Florian Fischer

We obtain upper bounds on the heat content and on the torsional rigidity of a complete Riemannian manifold M, assuming a generalized Hardy inequality for the Dirichlet Laplacian on M.

Differential Geometry · Mathematics 2007-05-23 Michiel van den Berg , Peter B. Gilkey

We construct families of optimal Hardy-weights for a subcritical linear second-order elliptic operator using a one-dimensional reduction. More precisely, we first characterise all optimal Hardy-weights with respect to one-dimensional…

Analysis of PDEs · Mathematics 2019-09-30 Yehuda Pinchover , Idan Versano

In this paper, we investigate further the weighted $p(x)$-Hardy inequality with the additional term of the form \[ \int_\Omega |\xi|^{p(x)}\mu_{1,\beta} (dx) \leqslant \int_\Omega |\nabla \xi|^{p(x)}\mu_{2,\beta} (dx)+\int_\Omega…

Analysis of PDEs · Mathematics 2015-06-01 Sylwia Dudek , Iwona Skrzypczak

In the context of Hardy inequalities for the fractional Laplacian $(-\Delta_{\mathbb{N}})^{\sigma}$ on the discrete half-line $\mathbb{N}$, we provide an optimal Hardy-weight $W^{\mathrm{op}}_{\sigma}$ for exponents…

Analysis of PDEs · Mathematics 2025-07-10 Ujjal Das , Rubén de la Fuente-Fernández

Upper bounds are obtained for the heat content of an open set D in a geodesically complete Riemannian manifold M with Dirichlet boundary condition on bd(D), and non-negative initial condition. We show that these upper bounds are close to…

Spectral Theory · Mathematics 2011-06-03 M. van den Berg , P. Gilkey , K. Kirsten , A. Grigor'yan

In this work we improve the sharp Hardy inequality in the case $p>n$ by adding an optimal weighted Hoelder semi-norm. To achieve this we first obtain a local improvement. We also obtain a refinement of both the Sobolev inequality for $p>n$…

Analysis of PDEs · Mathematics 2013-10-14 Georgios Psaradakis

This paper is devoted to Hardy inequalities concerning distance functions from submanifolds of arbitrary codimensions in the Riemannian setting. On a Riemannian manifold with non-negative curvature, we establish several sharp weighted Hardy…

Differential Geometry · Mathematics 2021-01-13 Yunxia Chen , Naichung Conan Leung , Wei Zhao

In this note we continue giving the characterisation of weights for two-weight Hardy inequalities to hold on general metric measure spaces possessing polar decompositions. Since there may be no differentiable structure on such spaces, the…

Functional Analysis · Mathematics 2021-07-14 Michael Ruzhansky , Daulti Verma

We show continuity in generalized weighted Morrey spaces of sub-linear integral operators generated by some classical integral operators and commutators. The obtained estimates are used to study global regularity of the solution of the…

Analysis of PDEs · Mathematics 2025-12-10 Vagif S. Guliyev , Mehriban Omarova , Lubomira Softova

The principal aim of this paper is to extend Birman's sequence of integral inequalities originally obtained in 1961, and containing Hardy's and Rellich's inequality as special cases, to a sequence of inequalities that incorporates power…

Classical Analysis and ODEs · Mathematics 2020-04-01 Fritz Gesztesy , Lance L. Littlejohn , Isaac Michael , Michael M. H. Pang

In this paper, we investigate the two-weight Hardy inequalities on metric measure space possessing polar decompositions for the case $p=1$ and $1 \leq q <\infty.$ This result complements the Hardy inequalities obtained in \cite{RV} in the…

Classical Analysis and ODEs · Mathematics 2022-12-15 Michael Ruzhansky , Anjali Shriwastawa , Bankteshwar Tiwari

The Hardy-Rellich inequality given here generalizes a Hardy inequality of Davies (1984), from the case of the Dirichlet Laplacian of a region $\Omega\subseteq\real^N$ to that of the higher order polyharmonic operators with Dirichlet…

Spectral Theory · Mathematics 2007-05-23 Mark P. Owen

We introduce generalised weighted central Morrey spaces over local fields and obtain a quantitative estimate for the boundedness of the Hardy--Hilbert-type integral operator on these newly introduced spaces, albeit specifically in the…

Functional Analysis · Mathematics 2025-06-16 Salman Ashraf , Humberto Rafeiro

We study relations and characterizations of various elliptic Harnack inequalities for symmetric non-local Dirichlet forms on metric measure spaces. We allow the scaling function be state-dependent and the state space possibly disconnected.…

Probability · Mathematics 2017-09-06 Zhen-Qing Chen , Takashi Kumagai , Jian Wang

In this paper we study unique continuation theorems for magnetic Schr\"odinger equation via Carleman estimates. We use integration by parts techniques in order to show these estimates. We consider electric and magnetic potentials with…

Analysis of PDEs · Mathematics 2013-12-10 Naiara Arrizabalaga , Miren Zubeldia

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