Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Efthimios Providas"'
Publikováno v:
Axioms, Vol 13, Iss 10, p 679 (2024)
The numerical solution of optimal control problems through second-order methods is examined in this paper. Controlled processes are described by a system of nonlinear ordinary differential equations. There are two specific characteristics of the clas
Externí odkaz:
https://doaj.org/article/1ecf478f399a4ee78cc1902f8eb1245c
Autor:
Rustam Azimov, Efthimios Providas
Publikováno v:
Algorithms, Vol 17, Iss 6, p 242 (2024)
This paper presents various machine learning methods with different text features that are explored and evaluated to determine the authorship of the texts in the example of the Azerbaijani language. We consider techniques like artificial neural netwo
Externí odkaz:
https://doaj.org/article/cd82ef38d90b49f0b90bae6047ffdc09
Publikováno v:
Algorithms, Vol 16, Iss 1, p 36 (2023)
Integro-differential equations involving Volterra and Fredholm operators (VFIDEs) are used to model many phenomena in science and engineering. Nonlocal boundary conditions are more effective, and in some cases necessary, because they are more accurat
Externí odkaz:
https://doaj.org/article/7667adab25c4489e85d0f1868ee2ecc6
Autor:
Efthimios Providas
Publikováno v:
Algorithms, Vol 15, Iss 6, p 203 (2022)
In this paper, a direct operator method is presented for the exact closed-form solution of certain classes of linear and nonlinear integral Volterra–Fredholm equations of the second kind. The method is based on the existence of the inverse of the r
Externí odkaz:
https://doaj.org/article/26a65bb757154128b677eff40a252fbe
Autor:
Efthimios Providas
Publikováno v:
Algorithms, Vol 15, Iss 5, p 151 (2022)
Recent developments have shown that the widely used simplified differential model of Eringen’s nonlocal elasticity in nanobeam analysis is not equivalent to the corresponding and initially proposed integral models, the pure integral model and the t
Externí odkaz:
https://doaj.org/article/5aa685a9c1c443e3bf4726b1867d4f59
Publikováno v:
Algorithms, Vol 14, Iss 12, p 346 (2021)
The aim of this article is to present a procedure for the factorization and exact solution of boundary value problems for a class of n-th order linear Fredholm integro-differential equations with multipoint and integral boundary conditions. We use th
Externí odkaz:
https://doaj.org/article/b985efbdfef14025a1e4f871da3f45e3
Autor:
Efthimios Providas
Publikováno v:
Algorithms, Vol 14, Iss 10, p 293 (2021)
This article is concerned with the construction of approximate analytic solutions to linear Fredholm integral equations of the second kind with general continuous kernels. A unified treatment of some classes of analytical and numerical classical meth
Externí odkaz:
https://doaj.org/article/31f53085ab2547dd8d809ff9f9c532a3
Publikováno v:
Axioms, Vol 10, Iss 3, p 226 (2021)
This paper deals with the solution of boundary value problems for ordinary differential equations with general boundary conditions. We obtain closed-form solutions in a symbolic form of problems with the general n-th order differential operator, as w
Externí odkaz:
https://doaj.org/article/c809768b94184580a67e22652b21c730
Autor:
Efthimios Providas
Publikováno v:
AppliedMath; Volume 2; Issue 2; Pages: 269-283
First, we develop a direct operator method for solving boundary value problems for a class of nth order linear Volterra–Fredholm integro-differential equations of convolution type. The proposed technique is based on the assumption that the Volterra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a862789421f859189f4b00df1a0fb459
This contributed volume provides an extensive account of research and expository papers in a broad domain of mathematical analysis and its various applications to a multitude of fields. Presenting the state-of-the-art knowledge in a wide range of top
