Results 21 to 30 of about 500,908 (169)

A Generalization of a Logarithmic Sobolev Inequality to the Hölder Class

open access: yesJournal of Function Spaces and Applications, 2012
In a recent work of the author, a parabolic extension of the elliptic Ogawa type inequality has been established. This inequality is originated from the Brézis-Gallouët-Wainger logarithmic type inequalities revealing Sobolev embeddings in the critical ...
H. Ibrahim
doaj   +1 more source

Approximation theory for weighted Sobolev spaces on curves [PDF]

open access: yes, 2001
17 pages, no figures.-- MSC2000 codes: 41A10, 46E35, 46G10.MR#: MR1882649 (2003c:42002)In this paper we present a definition of weighted Sobolev spaces on curves and find general conditions under which the spaces are complete.
Pestana, Domingo   +3 more
core   +1 more source

Weighted Variable Exponent Sobolev spaces on metric measure spaces

open access: yesMoroccan Journal of Pure and Applied Analysis, 2018
In this article we define the weighted variable exponent-Sobolev spaces on arbitrary metric spaces, with finite diameter and equipped with finite, positive Borel regular outer measure.
Hassib Moulay Cherif, Akdim Youssef
doaj   +1 more source

The Minimal Perimeter of a Log-Concave Function

open access: yesMathematics, 2020
Inspired by the equivalence between isoperimetric inequality and Sobolev inequality, we provide a new connection between geometry and analysis. We define the minimal perimeter of a log-concave function and establish a characteristic theorem of this ...
Niufa Fang, Zengle Zhang
doaj   +1 more source

A modified Φ-Sobolev inequality for canonical Lévy processes and its applications

open access: yesModern Stochastics: Theory and Applications, 2023
A new modified Φ-Sobolev inequality for canonical ${L^{2}}$-Lévy processes, which are hybrid cases of the Brownian motion and pure jump-Lévy processes, is developed.
Noriyoshi Sakuma, Ryoichi Suzuki
doaj   +1 more source

Algorithms and error bounds for multivariate piecewise constant approximation [PDF]

open access: yes, 2011
We review the surprisingly rich theory of approximation of functions of many vari- ables by piecewise constants. This covers for example the Sobolev-Poincar´e inequalities, parts of the theory of nonlinear approximation, Haar wavelets and tree ...
Davydov, Oleg
core   +4 more sources

Inclusion of Hajłasz – Sobolev class Mpα(X) into  the space of continuous functions in the critical case

open access: yesЖурнал Белорусского государственного университета: Математика, информатика, 2020
Let (X, d, µ) be a doubling metric measure space with doubling dimension γ, i. e. for any balls B(x, R) and B(x, r), r < R, following inequality holds µ(B(x, R)) ≤ aµ (R/r)γµ(B(x, r)) for some positive constants γ and aµ.
Sergey A. Bondarev
doaj   +1 more source

Sobolev inequality with non-uniformly degenerating gradient

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2022
In this paper we prove the following weighted Sobolev inequality in a bounded domain $\Omega\subset \mathbb{R}^n$, $ n\geq 1$, of a homogeneous space $(\mathbb{R}^n, \rho, wdx)$, under suitable compatibility conditions on the positive weight functions $(
Farman Mamedov, Sara Monsurrò
doaj   +1 more source

The logarithmic Sobolev inequality on the Heisenberg group and applications to the uncertainty inequality and heat equation

open access: yesJournal of Inequalities and Applications
We consider the logarithmic Sobolev inequality on the Heisenberg group. One can derive the logarithmic Sobolev inequality from the Sobolev inequality, and we consider an application to the uncertainty inequality on the Heisenberg group. Moreover, one can
Takeshi Suguro
doaj   +1 more source

Stability of Viscous Three‐Dimensional Stratified Couette Flow via Dispersion and Mixing

open access: yesCommunications on Pure and Applied Mathematics, EarlyView.
ABSTRACT This article explores the stability of stratified Couette flow in the viscous 3d$3d$ Boussinesq equations. In this system, mixing effects arise from the shearing background, and gravity acts as a restoring force leading to dispersive internal gravity waves.
Michele Coti Zelati   +2 more
wiley   +1 more source

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