Results 31 to 40 of about 21,571 (171)

ON STRONG SUMMABILITY OF THE FOURIER SERIES VIA DEFERRED RIESZ MEAN

Проблемы анализа
The strong summability technique has attracted a remarkably large number of researchers for better convergence analysis of infinite series as well as Fourier series in the study of summability theory.
J. Sahoo, B. B. Jena, S. K. Paikray
doaj   +1 more source

Multiparameter Riesz Commutators

, 2008
It is shown that product BMO of Chang and Fefferman, defined on the product of Euclidean spaces can be characterized by the multiparameter commutators of Riesz transforms. This extends a classical one-parameter result of Coifman, Rochberg, and Weiss, and
Brett, D. Wick, Jill C. Pipher, Michael T. Lacey, Stefanie Petermichl   +4 more
core   +3 more sources

Maximizing Riesz means of anisotropic harmonic oscillators

, 2018
We consider problems related to the asymptotic minimization of eigenvalues of anisotropic harmonic oscillators in the plane. In particular we study Riesz means of the eigenvalues and the trace of the corresponding heat kernels.
Larson, Simon
core   +1 more source

Adaptive weight-modified Riesz mean filter for high-density salt-and-pepper noise removal

Journal of Electrical Systems and Information Technology
This paper introduces a novel filter, the adaptive weight-modified Riesz mean filter (AWMRmF), designed for the effective removal of high-density salt-and-pepper noise.
Md Jahidul Islam
doaj   +1 more source

Shape Derivatives of the Eigenvalues of the de Rham Complex for Lipschitz Deformations and Variable Coefficients: Part II

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT In this second part of our series of papers, we develop an abstract framework suitable for de Rham complexes that depend on a parameter belonging to an arbitrary Banach space. Our primary focus is on spectral perturbation problems and the differentiability of eigenvalues with respect to perturbations of the involved parameters. As a byproduct,
Pier Domenico Lamberti, Dirk Pauly, Michele Zaccaron   +2 more
wiley   +1 more source

Riesz means and bilinear Riesz means on M\'{e}tivier groups

, 2022
Comment: arXiv admin note: text overlap with arXiv:1712 ...
Wang, Min, Zhu, Hua
openaire   +1 more source

Linear Toroidal‐Inertial Waves on A Differentially Rotating Sphere with Application to Helioseismology: Modeling, Forward and Inverse Problems

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT This paper develops a mathematical framework for interpreting observations of solar inertial waves in an idealized setting. Under the assumption of purely toroidal linear waves on the sphere, the stream function of the flow satisfies a fourth‐order scalar equation.
Tram Thi Ngoc Nguyen, Damien Fournier, Laurent Gizon, Thorsten Hohage   +3 more
wiley   +1 more source

Weighted norm inequalities, off-diagonal estimates and elliptic operators. Part IV: Riesz transforms on manifolds and weights

, 2007
This is the fourth article of our series. Here, we study weighted norm inequalities for the Riesz transform of the Laplace-Beltrami operator on Riemannian manifolds and of subelliptic sum of squares on Lie groups, under the doubling volume property and ...
A. Grigor’yan, A. Grigor’yan, D. Bakry, G. Alexopoulos, G. Carron, H.Q. Li, I. Chavel, José María Martell, L. Grafakos, L. Saloff-Coste, N. Dungey, N. Varopoulos, P. Auscher, P. Auscher, P. Auscher, P. Buser, P. Hajłasz, Pascal Auscher, T. Coulhon, T. Coulhon, T. Coulhon   +20 more
core   +1 more source

Financial Statement Information and Equity Value: The Role of Real Options Characteristics

Financial Management, EarlyView.
ABSTRACT This paper examines whether firm‐specific real options characteristics are equity value‐relevant beyond valuation estimates anchored in financial statements. Using extensive historical data for the United Kingdom, we assess and compare the forecast accuracy and explanatory power for stock prices of equity valuation models based on residual ...
Mingyu (Chandler) Chen, Colin Clubb, Tarik Driouchi   +2 more
wiley   +1 more source

Amenability, extreme amenability, model-theoretic stability, and dependence property in integral logic

, 2016
This paper has three parts. First, we study and characterize amenable and extremely amenable topological semigroups in terms of invariant measures using integral logic.
Khanaki, Karim
core   +1 more source