Results 1 to 10 of about 173,742,459 (298)

On One- and Two-Dimensional α–Stancu–Schurer–Kantorovich Operators and Their Approximation Properties

Mathematics, 2022
The goal of this research article is to introduce a sequence of α–Stancu–Schurer–Kantorovich operators. We calculate moments and central moments and find the order of approximation with the aid of modulus of continuity.
Md. Heshamuddin, Nadeem Rao, Bishnu P. Lamichhane, Adem Kiliçman, Mohammad Ayman-Mursaleen   +4 more
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High order approximation of degree nine and order eighteen

Journal of Inequalities and Applications, 2019
In this paper, a method to approximate curves by polynomials of degree nine is presented. The resulting approximation has order eighteen. The method is applied to approximate a circular arc, and the error function is studied and characterized, and its ...
Abedallah Rababah
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The evaluation of the order of approximation of the matrix method for numerical integration of the boundary value problems for systems of linear non-homogeneous ordinary differential equations of the second order with variable coefficients. Message 1. Boundary value problems with boundary conditions of the first kind

Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2016
We present the first message of the cycle from two articles where the rearrangement of the order of approximation of the matrix method of numerical integration depending on the degree in the Taylor’s polynomial expansion of solutions of boundary value ...
Vladimir N Maklakov
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The evaluation of the order of approximation of the matrix method for numerical integration of the boundary value problems for systems of linear non-homogeneous ordinary differential equations of the second order with variable coefficients. Message 2. Boundary value problems with boundary conditions of the second and third kind

Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2017
We present the second message of the cycle from two articles where the rearrangement of the order of approximation of the matrix method of numerical integration depending on the degree in the Taylor’s polynomial expansion of solutions of boundary value ...
Vladimir N Maklakov
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On a subclass of C1 functions for which the Lagrange interpolation yields the Jackson order of approximation

International Journal of Mathematics and Mathematical Sciences, 1994
We continue the investigation initiated by Mastroianni and Szabados on question whether Jackson's order of approximation can be attained by Lagrange interpolation for a wide class of functions.
Xin Li
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Finite-difference method for solving Tricomi problem for the Lavrent’ev-Bitsadze equation

Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2017
In this paper we obtain an a priori estimate for solution of Tricomi problem for the Lavrent’ev-Bitsadze equation, from which the uniqueness of regular solution follows. Presented a numerical finite-difference method for solving the investigated problem.
Giraslan A Balkizov, Aslan A Sokurov
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Approximation of Fractional Order PI^λD^μ-Controller Transfer Function Using Chain Fractions

Energies, 2022
The approximation of a fractional order PIλDμ-controller transfer function using a chain fraction theory is considered. Analytical expressions for the approximation of s±α components of the transfer functions of PIλDμ-controllers were obtained through ...
Yaroslav Marushchak, Damian Mazur, Bogdan Kwiatkowski, Bohdan Kopchak, Tadeusz Kwater, Maciej Koryl   +5 more
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Non-Integer Order Approximation of a PID-Type Controller for Boost Converters

Energies, 2021
In this work, the voltage regulation of a boost converter is addressed. A non-integer order PID controller is proposed to deal with the closed-loop instability of the system.
Allan G. S. Sánchez, Francisco J. Pérez-Pinal, Martín A. Rodríguez-Licea, Cornelio Posadas-Castillo   +3 more
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Order of Approximation by a New Univariate Kantorovich Type Operator

International Journal of Analysis and Applications, 2023
In order to approximate Lebesgue integrable functions on [0, 1], a sequence of linear positive integral operators of Kantorovich type Lσf (x) with a parameter sσ is introduced.
Asha Ram Gairola, Nidhi Bisht, Laxmi Rathour, Lakshmi Narayan Mishra, Vishnu Narayan Mishra   +4 more
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The Chebyshev Set Problem in Riesz Space

Journal of Function Spaces, 2022
In this paper, we mainly study the best approximation theory in Riesz space, which is not constructed by the norm, but only rely on the order structure.
Shengwei Wu, Jiarui Zhao, Yanyan Xu, Guanggui Chen, Na Cheng   +4 more
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