Results 11 to 20 of about 48,273 (284)

Almost everywhere convergence of varying-parameter setting Cesaro means of Fourier series on the group of 2-adic integers

open access: yesMathematica, 2023
In this paper we prove that the maximal operator of Cesaro-means for one-dimensional Fourier series on the group of 2-adic integers is of weak type (L^{1}, L^{1}).
Adimasu Ateneh Tilahun
semanticscholar   +1 more source

Generalized Localization and Summability Almost Everywhere of Multiple Fourier Series and Integrals

open access: yesСовременная математика: Фундаментальные направления, 2021
It is well known that Luzin’s conjecture has a positive solution for one-dimensional trigonometric Fourier series, but in the multidimensional case it has not yet found its confirmation for spherical partial sums of multiple Fourier series. Historically,
R. R. Ashurov
doaj   +1 more source

Norm and almost everywhere convergence of matrix transform means of Walsh-Fourier series

open access: yesActa Universitatis Sapientiae: Mathematica, 2023
We show the uniformly boundedness of the L1 norm of general matrix transform kernel functions with respect to the Walsh-Paley system. Special such matrix means are the well-known Cesàro, Riesz, Bohner-Riesz means.
I. Blahota, G. Gát
semanticscholar   +1 more source

Some applications of the Menshov–Rademacher theorem

open access: yesComptes Rendus. Mathématique, 2021
Given a sequence $(X_n)$ of real or complex random variables and a sequence of numbers $(a_n)$, an interesting problem is to determine the conditions under which the series $\sum _{n=1}^\infty a_n X_n$ is almost surely convergent.
Mukeru, Safari
doaj   +1 more source

Almost everywhere convergence of Bochner-Riesz means for the Hermite operators [PDF]

open access: yesAdvances in Mathematics, 2020
Let $H = -\Delta + |x|^2$ be the Hermite operator in ${\mathbb R}^n$. In this paper we study almost everywhere convergence of the Bochner-Riesz means associated with $H$ which is defined by $S_R^{\lambda}(H)f(x) = \sum\limits_{k=0}^{\infty} \big(1-{2k+n ...
Peng Chen   +4 more
semanticscholar   +1 more source

Almost everywhere convergence and divergence of Cesàro means with varying parameters of Walsh–Fourier series

open access: yesArabian Journal of Mathematics, 2021
In the present paper, we prove the almost everywhere convergence and divergence of subsequences of Cesàro means with zero tending parameters of Walsh–Fourier series.
G. Gát, U. Goginava
semanticscholar   +1 more source

Generalization and new proof for almost everywhere convergence to imply local convergence in measure [PDF]

open access: yesJournal of Interdisciplinary Mathematics, 2020
With a new proof approach we prove in a more general setting the classical convergence theorem that almost everywhere convergence of measurable functions on a finite measure space implies convergence in measure.
Yu-Lin Chou
semanticscholar   +1 more source

Global convergence of successive approximations of the Darboux problem for partial functional differential equations with infinite delay [PDF]

open access: yesOpuscula Mathematica, 2014
We consider the Darboux problem for the hyperbolic partial functional differential equation with infinite delay. We deal with generalized (in the "almost everywhere" sense) solutions of this problem.
Tomasz Człapiński
doaj   +1 more source

ON \(\Lambda\)-CONVERGENCE ALMOST EVERYWHERE OF MULTIPLE TRIGONOMETRIC FOURIER SERIES

open access: yesUral Mathematical Journal, 2017
We consider one type of convergence of multiple trigonometric Fourier series intermediate between the convergence over cubes and the \(\lambda \)-convergence for \(\lambda >1\).
Nikolai Yu. Antonov
doaj   +1 more source

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