Results 11 to 20 of about 51 (51)

Applications of the deferred generalized de la Vall´ee Poussin means in approximation of continuous functions [PDF]

open access: yes, 2022
In this paper we have proved a theorem which show the degree of approximation of periodic functions by some generalized means of their Fourier series. In addition, our result is extended to two-dimensional setting as well.
KRASNIQI, Xhevat Z.
core   +2 more sources

A note on the degree of approximation of functions belonging to certain Lipschitz class by almost Riesz means [PDF]

open access: yes, 2018
The problem of obtaining degree of approximation for the 2π−periodic functions in the weighted Lipschitz class W (Lp, ξ(t)) (p ≥ 1) by Riesz means of the Fourier series have been studied by various investigators under Lp−norm.
RATHORE, Arti, SINGH, Uaday
core   +2 more sources

Stieltjes-type polynomials on the unit circle [PDF]

open access: yes, 2009
29 pages, no figures.-- MSC2000 codes: Primary 65D32, 42A10, 42C05; Secondary 30E20.MR#: MR2476567Stieltjes-type polynomials corresponding to measures supported on the unit circle T are introduced and their asymptotic properties away from T are studied ...
López Lagomasino, Guillermo   +2 more
core   +1 more source

Equivalence Between K-functionals Based on Continuous Linear Transforms [PDF]

open access: yes, 2007
2000 Mathematics Subject Classification: 46B70, 41A10, 41A25, 41A27, 41A35, 41A36, 42A10.The paper presents a method of relating two K-functionals by means of a continuous linear transform of the function.
Draganov, Borislav, Ivanov, Kamen
core  

Weyl almost periodic functions on time scales and their Fourier series

open access: yesDemonstratio Mathematica
In this paper, firstly, we propose a concept of Weyl almost periodic functions on time scales by trigonometric polynomial approximation, and study some basic properties of Weyl almost periodic functions on time scales.
Li Yongkun, Huang Xiaoli
doaj   +1 more source

Optimal Bell Functions for Biorthogonal Local Trigonometric Bases

open access: yes, 1997
A general approach for biorthogononal local trigonometric bases in the twooverlapping setting was given by Chui and Shi. In this paper, we give error estimates for the approximation with such basis functions.
Kai Bittner
core  

Biorthogonal Smooth Local Trigonometric Bases

open access: yes, 1994
In this paper we discuss smooth local trigonometric bases. We present two generalizations of the orthogonal basis of Malvar and Coifman-Meyer: biorthogonal and equal parity bases.
Björn Jawerth, Wim Sweldens
core  

Embracing off-the-grid samples. [PDF]

open access: yesSampl Theory Signal Process Data Anal, 2023
López O, Yılmaz Ö.
europepmc   +1 more source

Accelerating the convergence of trigonometric series

open access: yesOpen Mathematics, 2006
Nersessian Anry, Poghosyan Arnak
doaj   +1 more source

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