Results 1 to 10 of about 169,552 (158)

On certain Baskakov-Durrmeyer type operators [PDF]

open access: yesSurveys in Mathematics and its Applications, 2010
This paper is a study of the degree of approximation by the linear combinations of the derivatives of certain Durrmeyer type integral modification of the Baskakov operators in terms of the higher order modulus of smoothness.
Asha Ram Gairola
doaj  

The approximation of bivariate Chlodowsky-Szász-Kantorovich-Charlier-type operators

open access: yesJournal of Inequalities and Applications, 2017
In this paper, we introduce a bivariate Kantorovich variant of combination of Szász and Chlodowsky operators based on Charlier polynomials. Then, we study local approximation properties for these operators.
Purshottam Narain Agrawal   +2 more
doaj   +1 more source

Approximation of functions by (C,2)(E,1) product summability method of Fourier series

open access: yesRatio Mathematica, 2020
Various investigators such as Leindler [10], Chandra [1], Mishra et al. [7], Khan [11], Kushwaha [6] have determined the degree of approximation of  2 pai-periodic functions belonging to generalized Lipschitz class of functions through trigonometric ...
Jitendra Kumar Kushwaha
doaj   +1 more source

Approximation of signals (functions) belonging to certain Lipschitz classes by almost Riesz means of its Fourier series

open access: yesJournal of Inequalities and Applications, 2016
To start with, signals are dealt with as functions of one variable and images are shown by elements of two variables. The investigation of these ideas is directly related to the transpiring area of information technology.
Deepmala, Laurian-Ioan Piscoran
doaj   +1 more source

Quantumness’ Degree of Thermal Optics’ Approximations

open access: yesSymmetry, 2022
We assess the degree of quantumness of the P, Q, and W quantum optics’ approximations in a thermal context governed by the canonical ensemble treatment. First, we remint the reader of the bridge connecting quantum optics with statistical mechanics using the abovementioned approximations at the temperature T.
Flavia Pennini, Angelo Plastino
openaire   +3 more sources

Asymptotic behavior of solutions to difference equations in Banach spaces

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2021
We investigate the asymptotic properties of solutions to higher order nonlinear difference equations in Banach spaces. We introduce a new technique based on a vector version of discrete L'Hospital's rule, remainder operator, and the regional topology on ...
Janusz Migda
doaj   +1 more source

Degrees of the approximations by some special matrix means of conjugate Fourier series

open access: yesDemonstratio Mathematica, 2019
In this paper we will present the pointwise and normwise estimations of the deviations considered by W. Łenski, B. Szal, [Acta Comment. Univ. Tartu. Math., 2009, 13, 11-24] and S. Saini, U. Singh, [Boll. Unione Mat. Ital., 2016, 9, 495-504] under general
Kranz Radosława   +2 more
doaj   +1 more source

Approximation of functions in Besov space by deferred Cesàro mean

open access: yesJournal of Inequalities and Applications, 2016
In this paper we study the degree of approximation of functions (signals) in a Besov space by trigonometric polynomials using deferred Cesàro mean. We also deduce a few corollaries of our main result and compare them with the existing results.
Mradul Veer Singh, Madan Lal Mittal
doaj   +1 more source

The degree of copositive approximation by polynomials [PDF]

open access: yesProceedings of the American Mathematical Society, 1983
Jackson type theorems are established for the approximation of a function f f that changes sign finitely many times in [ − 1 , 1 ] [ - 1,1] by polynomials p n {p_n} which are copositive with it f
openaire   +1 more source

Degree of simultaneous approximation by Birkhoff splines

open access: yesJournal of Numerical Analysis and Approximation Theory, 2001
In the present note we study the degree of simultaneous approximation by certain Birkhoff spline interpolation operators. Special emphasis is on estimates in terms of higher order moduli of smoothness. This generalizes earlier results of Meir and Sharma,
Heiner Gonska, Daniela Kacsó
doaj   +2 more sources

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