Results 11 to 20 of about 1,429 (86)

Linear functions and duality on the infinite polytorus [PDF]

open access: yes, 2019
We consider the following question: Are there exponents ...
Brevig, Ole Fredrik
core   +2 more sources

Conditions implying regularity of the three dimensional Navier-Stokes equation [PDF]

open access: yes, 2004
We obtain logarithmic improvements for conditions for regularity of the Navier-Stokes equation, similar to those of Prodi-Serrin or Beale-Kato-Majda. Some of the proofs make use of a stochastic approach involving Feynman-Kac like inequalities. As part of
Jiang, Lingyu, Wang, Yidong
core   +5 more sources

A double-phase eigenvalue problem with large exponents

open access: yesOpen Mathematics, 2023
In the present article, we consider a double-phase eigenvalue problem with large exponents. Let λ(pn,qn)1{\lambda }_{\left({p}_{n},{q}_{n})}^{1} be the first eigenvalues and un{u}_{n} be the first eigenfunctions, normalized by ‖un‖ℋn=1\Vert {u}_{n}{\Vert
Yu Lujuan
doaj   +1 more source

Concentration-compactness principle associated with Adams' inequality in Lorentz-Sobolev space

open access: yesAdvanced Nonlinear Studies, 2022
The concentration-compactness principle of Lions type in Euclidean space relies on the Pólya-Szegö inequality, which is not available in non-Euclidean settings.
Li Dongliang, Zhu Maochun
doaj   +1 more source

Weighted CBMO estimates for commutators of matrix Hausdorff operator on the Heisenberg group

open access: yesOpen Mathematics, 2020
In this article, we study the commutators of Hausdorff operators and establish their boundedness on the weighted Herz spaces in the setting of the Heisenberg group.
Ajaib Amna, Hussain Amjad
doaj   +1 more source

Sobolev spaces, Lebesgue points and maximal functions

open access: yes, 2013
In this note we study boundedness of a large class of maximal operators in Sobolev spaces that includes the spherical maximal operator. We also study the size of the set of Lebesgue points with respect to convergence associated with such maximal ...
Hajlasz, Piotr, Liu, Zhuomin
core   +1 more source

An Innovative Approach to the Product of k-Hybrid Functional Integral Equation

open access: yesAbstract and Applied Analysis
MSC2020 Classification: 46E30, 45G10, 47H30, 47N20, and ...
A. M. A. El-Sayed, Sh. M. Al-Issa
doaj   +1 more source

Non-ideal sampling in shift-invariant spaces associated with quadratic-phase Fourier transforms

open access: yesAlexandria Engineering Journal, 2023
Non-ideal sampling has nourished as one of the most attractive alternatives to classical sampling, which relies on shift-invariant spaces. The present study focuses on investigating the non-ideal sampling in shift-invariant spaces associated with the ...
Waseem Z. Lone   +5 more
doaj   +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

An Efficient Algorithm for Reconstruction Images Corrupted by Some Multiplicative Noises

open access: yesMoroccan Journal of Pure and Applied Analysis, 2019
In this paper, we propose a novel hybrid model for restoration of images corrupted by multiplicative noise. Using a MAP estimator, we can derive a functional whose minimizer corresponds to the denoised image we want to recover.
Ziad L., Oubbih O., Sniba F.
doaj   +1 more source

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