Results 11 to 20 of about 7,154 (300)

Density topology and pointwise convergence [PDF]

open access: yesApplied General Topology, 2003
We shall show that the space of all approximately continuous functions with the topology of pointwise convergence is not homeomorphic to its category analogue.
Wladyslaw Wilczynski
doaj   +3 more sources

Pointwise and Uniform Convergence of Fourier Extensions [PDF]

open access: yesConstructive Approximation, 2019
AbstractFourier series approximations of continuous but nonperiodic functions on an interval suffer the Gibbs phenomenon, which means there is a permanent oscillatory overshoot in the neighborhoods of the endpoints. Fourier extensions circumvent this issue by approximating the function using a Fourier series that is periodic on a larger interval ...
Webb, Marcus   +2 more
openaire   +9 more sources

On pointwise convergence of bivariate nonlinear singular integral operators [PDF]

open access: yesKuwait Journal of Science, 2017
In this paper, we present some theorems on pointwise convergence and the rate of pointwise convergence for the family of nonlinear bivariate singular integral operators of the following form: whereis a real valued and integrable function on a bounded ...
Gumrah Uysal   +2 more
doaj   +6 more sources

Pointwise Convergence of the Klein–Gordon Flow [PDF]

open access: yesSIAM Journal on Mathematical Analysis
We consider the PDEs version of the Carleson problem in the context of the cubic nonlinear Klein-Gordon equation. This means that we aim to establish the lowest regularity class for which one has almost everywhere pointwise convergence of the solutions to the initial data, as $t \to 0$.
Renato Lucà, Pablo Merino
core   +6 more sources

Pointwise Convergence of Noncommutative Fourier Series [PDF]

open access: yesMemoirs of the American Mathematical Society, 2023
This paper is devoted to the study of pointwise convergence of Fourier series for group von Neumann algebras and quantum groups. It is well-known that a number of approximation properties of groups can be interpreted as summation methods and mean convergence of the associated noncommutative Fourier series.
Hong, Guixiang   +2 more
openaire   +3 more sources

Pointwise Convergence of Multiple Trigonometric Series [PDF]

open access: yesJournal of Mathematical Analysis and Applications, 1994
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Chen, C.P., Wu, H.C., Moricz, F.
openaire   +3 more sources

Implementation of reproducing kernel Hilbert algorithm for pointwise numerical solvability of fractional Burgers’ model in time-dependent variable domain regarding constraint boundary condition of Robin

open access: yesResults in Physics, 2021
Through the utilized investigation, a novel algorithm in reproducing kernel Hilbert approach is applied to generate pointwise numerical solution to time-fractional Burgers’ model in fulness of overdetermination Robin boundary condition.
Omar Abu Arqub   +4 more
doaj   +1 more source

On the double Lusin condition and convergence theorem for Kurzweil-Henstock type integrals [PDF]

open access: yesMathematica Bohemica, 2016
Equiintegrability in a compact interval $E$ may be defined as a uniform integrability property that involves both the integrand $f_n$ and the corresponding primitive $F_n$.
Abraham Racca, Emmanuel Cabral
doaj   +1 more source

Pointwise-in-time a posteriori error control for time-fractional parabolic equations [PDF]

open access: yes, 2021
For time-fractional parabolic equations with a Caputo time derivative of order α ∈ (0, 1), we give pointwise-in-time a posteriori error bounds in the spatial L2 and L∞ norms.
NATALIA KOPTEVA (12353197)   +1 more
core   +2 more sources

Well-posedness of the solution of the fractional semilinear pseudo-parabolic equation

open access: yesBoundary Value Problems, 2020
This article concerns the Cauchy problem for the fractional semilinear pseudo-parabolic equation. Through the Green’s function method, we prove the pointwise convergence rate of the solution.
Jiazhuo Cheng, Shaomei Fang
doaj   +1 more source

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