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We present in this paper a new way to define weighted Sobolev spaces when the weight functions are arbitrary small. This new approach can replace the old one consisting in modifying the domain by removing the set of points where at least…

Analysis of PDEs · Mathematics 2025-04-15 Djamel eddine Kebiche

We obtain new oscillation inequalities in metric spaces in terms of the Peetre $K-$functional and the isoperimetric profile. Applications provided include a detailed study of Fractional Sobolev inequalities and the Morrey-Sobolev embedding…

Functional Analysis · Mathematics 2014-04-01 Joaquim Martin , Mario Milman

The main goal of this paper is to introduce a new fractional anisotropic Sobolev space with variable exponent where the basic qualitative properties (completeness, separability, reflexivity, ...) are established, including the continuous…

Analysis of PDEs · Mathematics 2024-10-07 Elhoussine Azroul , Abdelkrim Barbara , Nezha Kamali , Mohammed Shimi

We obtain symmetrization inequalities in the context of Fractional Hajlasz-Sobolev spaces in the setting of rearrangement invariant spaces and prove that for a large class of measures our symmetrization inequalities are equivalent to the…

Functional Analysis · Mathematics 2021-04-27 Joaquim Martin , Walter A. Ortiz

We consider an oblique derivative problem in a wedge for nondivergence parabolic equations with discontinuous in $t$ coefficients. We obtain weighted coercive estimates of solutions in anisotropic Sobolev spaces.

Analysis of PDEs · Mathematics 2015-07-31 Vladimir Kozlov , Alexander Nazarov

We consider both divergence and non-divergence parabolic equations on a half space in weighted Sobolev spaces. All the leading coefficients are assumed to be only measurable in the time and one spatial variable except one coefficient, which…

Analysis of PDEs · Mathematics 2014-03-12 Hongjie Dong , Doyoon Kim

We provide a complete characterization of compactness of Sobolev embeddings of radially symmetric functions on the entire space $\mathbb{R}^n$ in the general framework of rearrangement-invariant function spaces. We avoid any unnecessary…

Functional Analysis · Mathematics 2026-03-05 Zdeněk Mihula

Combining the sharp isoperimetric inequality established by Z. Balogh and A. Krist\'aly [Math. Ann., in press, doi:10.1007/s00208-022-02380-1] with an anisotropic symmetrization argument, we establish sharp Morrey-Sobolev inequalities on…

Analysis of PDEs · Mathematics 2022-10-17 Alexandru Kristály , Ágnes Mester , Ildikó I. Mezei

In this paper, we establish a weighted Adams' inequality in some appropriate weighted Sobolev space in $\mathbb{R}^4$. Then we give an improvement inequality by proving the concentration-compactness result. In the last part, we consider an…

Analysis of PDEs · Mathematics 2023-03-28 Wenjing Chen , Shiqi Zhang

In this paper we establish several Hardy and Hardy-Sobolev type inequalities with homogeneous weights on the first orthant $\displaystyle \mathbb{R}_{*}^n:=\{(x_1, \ldots, x_n):x_1>0, \ldots, x_n>0 \}$. We then use some of them to produce…

Analysis of PDEs · Mathematics 2021-08-11 I. Kömbe , S. Bakım , R. Tellioğlu Balekoğlu

Anisotropic elliptic equations of the second order with variable exponents in nonlinearities and the right-hand side as a diffuse measure are considered in the space $\mathbb{R}^n$. The existence of an entropy solution in anisotropic…

Analysis of PDEs · Mathematics 2020-01-01 L. M. Kozhevnikova

In this paper, we uncover a novel connection between the Fenchel-Willmore inequality and a new logarithmic Sobolev inequality for mean-convex submanifolds immersed in non-negatively curved manifolds with Euclidean volume growth. Building on…

Differential Geometry · Mathematics 2025-10-10 Meng Ji , Kwok-Kun Kwong

We investigate several functional and geometric inequalities on the hyperbolic space $\mathbb{H}^N$, with a primary emphasis on logarithmic Sobolev inequalities, Poincar\'e inequalities, and Beckner-type inequalities, all studied within the…

Analysis of PDEs · Mathematics 2026-02-17 Anh Xuan Do , Debdip Ganguly , Nguyen Lam , Guozhen Lu

We study the embeddings of (homogeneous and inhomogeneous) anisotropic Besov spaces associated to an expansive matrix $A$ into Sobolev spaces, with focus on the influence of $A$ on the embedding behaviour. For a large range of parameters,…

Functional Analysis · Mathematics 2021-09-17 David Bartusel , Hartmut Führ

Using the ABP-method as in a recent work by Brendle, we establish some sharp Sobolev and isoperimetric inequalities for compact domains and submanifolds in a complete Riemannian manifold with asymptotically nonnegative curvature. These…

Differential Geometry · Mathematics 2022-06-17 Yuxin Dong , Hezi Lin , Lingen Lu

We present a class of modified logarithmic Sobolev inequality, interpolating between Poincar\'e and logarithmic Sobolev inequalities, suitable for measures of the type $\exp(-|x|^\al)$ or more complex $\exp(-|x|^\al\log^\beta(2+|x|))$…

Probability · Mathematics 2016-09-07 Ivan Gentil , Arnaud Guillin , Laurent Miclo

The purpose of this paper is twofold. We first prove a weighted Sobolev inequality and part of a weighted Morrey's inequality, where the weights are a power of the mean curvature of the level sets of the function appearing in the…

Analysis of PDEs · Mathematics 2011-11-14 Xavier Cabre , Manel Sanchon

We prove the unique solvability in weighted Sobolev spaces of non-divergence form elliptic and parabolic equations on a half space with the homogeneous Neumann boundary condition. All the leading coefficients are assumed to be only…

Analysis of PDEs · Mathematics 2015-02-20 Hongjie Dong , Doyoon Kim , Hong Zhang

In this article we present Sobolev-type inequalities for the localization of pseudo-relativistic energy.

Mathematical Physics · Physics 2007-05-23 A. A. Balinsky , A. E. Tyukov

We consider inhomogeneous $p$-Laplace type equations of the form $-\mathrm{div}\left(a(\nabla u)\right)=f$ in a possibly anisotropic setting. Under general assumptions on the source term $f$, we obtain quantitative Sobolev regularity…

Analysis of PDEs · Mathematics 2021-12-17 Carlo Alberto Antonini , Giulio Ciraolo , Alberto Farina