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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

Sharp extensions of Pitt's inequality and bounds for Stein-Weiss fractional integrals are obtained that incorporate gradient forms and vector-valued operators. Such results include Hardy-Rellich inequalities.

Analysis of PDEs · Mathematics 2007-05-23 William Beckner

In this paper, we present the geometric Hardy inequality for the sub-Laplacian in the half-spaces on the stratified groups. As a consequence, we obtain the following geometric Hardy inequality in a half-space on the Heisenberg group with a…

Analysis of PDEs · Mathematics 2018-11-20 Michael Ruzhansky , Bolys Sabitbek , Durvudkhan Suragan

We show how to deduce Rellich inequalities from Hardy inequalities on infinite graphs. Specifically, the obtained Rellich inequality gives an upper bound on a function by the Laplacian of the function in terms of weighted norms. These…

Analysis of PDEs · Mathematics 2020-08-26 Matthias Keller , Yehuda Pinchover , Felix Pogorzelski

In this note we give several characterisations 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 2019-12-24 Michael Ruzhansky , Daulti Verma

We use different approaches to study a generalization of a result of Levin and Ste\v{c}kin concerning an inequality analogous to Hardy's inequality. Our results lead naturally to the study of weighted remainder form of Hardy-type…

Functional Analysis · Mathematics 2009-07-31 Peng Gao

Using a method of factorization and by introducing a generalized discrete Dirichlet's Laplacian matrix $(-\Delta_{\Lambda})$, we establish an extended improved discrete Hardy's inequality and Rellich inequality in one dimension. We prove…

Functional Analysis · Mathematics 2024-03-27 Bikram Das , Atanu Manna

In this paper we continue to advance the theory regarding the Riesz fractional gradient in the calculus of variations and fractional partial differential equations begun in an earlier work of the same name. In particular we here establish…

Functional Analysis · Mathematics 2016-11-23 Daniel Spector , Tien-Tsan Shieh

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

We analyse Morrey spaces, generalised Morrey spaces and Campanato spaces on homogeneous groups. The boundedness of the Hardy-Littlewood maximal operator, Bessel-Riesz operators, generalised Bessel-Riesz operators and generalised fractional…

Functional Analysis · Mathematics 2017-01-05 Michael Ruzhansky , Durvudkhan Suragan , Nurgissa Yessirkegenov

We extend the work of Dyda and Kijaczko by establishing the corresponding weighted fractional Hardy inequalities with singularities on any flat submanifolds. While they derived weighted fractional Hardy inequalities with singularities at a…

Analysis of PDEs · Mathematics 2026-02-11 Vivek Sahu

In this article, we look for the weight functions (say $g$) that admits the following generalized Hardy-Rellich type inequality: $ \int_{\Omega} g(x) u^2 dx \leq C \int_{\Omega} |\Delta u|^2 dx, \forall u \in \mathcal{D}^{2,2}_0(\Omega), $…

Analysis of PDEs · Mathematics 2021-02-11 T. V. Anoop , Ujjal Das , Abhishek Sarkar

In this note we extend several integral inequalities to the context of noncommutative Vilenkin groups. We prove some sharp weak and strong type estimates for the Hardy operator and the Hardy-Littlewood-P{\'o}lya operator on constant-order…

Functional Analysis · Mathematics 2022-08-09 Aidyn Kassymov , J. P Velasquez-Rodriguez

We present factorizations of weighted Lebesgue, Ce\-s\` aro and Copson spaces, for weights satisfying the conditions which assure the boundedness of the Hardy's integral operator between weighted Lebesgue spaces. Our results enhance, among…

Classical Analysis and ODEs · Mathematics 2026-02-11 Sorina Barza , Anca N. Marcoci , Liviu G. Marcoci

In this paper some important inequalities are revisited. First, as motivation, we give another proof of the Hardy's inequality applying convenient vector fields as introduced by Mitidieri, see [6]. Then, we investigate a particular case of…

Analysis of PDEs · Mathematics 2010-07-14 Aldo Bazan , Wladimir Neves

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

In this short paper, we establish a range of Caffarelli-Kohn-Nirenberg and weighted $L^{p}$-Sobolev type inequalities on stratified Lie groups. All inequalities are obtained with sharp constants. Moreover, the equivalence of the Sobolev…

Functional Analysis · Mathematics 2017-09-26 Michael Ruzhansky , Durvudkhan Suragan , Nurgissa Yessirkegenov

We establish in this paper some weighted Hardy and Rellich type inequalities on the half line in the framework of equalities, extending recent results proved by Machihara-Ozawa-Wadade and Bez-Machihara-Ozawa. In particular, the…

Classical Analysis and ODEs · Mathematics 2023-04-04 Yi C. Huang , Fuping Shi

When studying the weighted Hardy-Rellich inequality in $L^2$ with the full gradient replaced by the radial derivative the best constant becomes trivially larger or equal than in the first situation. Our contribution is to determine the new…

Analysis of PDEs · Mathematics 2024-06-25 Cristian Cazacu , Irina Fidel

We give a sufficient condition for limiting Sobolev and Hardy inequalities to hold on stratified homogeneous groups. In the Euclidean case, this condition reduces to the known cancelling necessary and sufficient condition. We obtain in…

Classical Analysis and ODEs · Mathematics 2022-08-18 Jean Van Schaftingen , Po-Lam Yung