نتایج جستجو برای: fredholm integral equations

تعداد نتایج: 342368  

Journal: :J. Computational Applied Mathematics 2010
Martin Costabel Eric Darrigrand E. H. Koné

We derive and analyze two equivalent integral formulations for the time-harmonic electromagnetic scattering by a dielectric object. One is a volume integral equation (VIE) with a strongly singular kernel and the other one is a coupled surface-volume system of integral equations with weakly singular kernels. The analysis of the coupled system is based on standard Fredholm integral equations, and...

Journal: :Int. J. Approx. Reasoning 1999
Menahem Friedman Ming Ma Abraham Kandel

Using a parametric Riemann integral representation, a numerical algorithm for solving fuzzy Fredholm and Voltera integral equations of the second kind with arbitrary kernel is proposed and illustrated with examples. © 1999 Elsevier Science Inc. All rights reserved.

2012
ZAKIEH AVAZZADEH MOHAMMAD HEYDARI

In this paper, an efficient method is presented for solving two dimensional Fredholm and Volterra integral equations of the second kind. Chebyshev polynomials are applied to approximate a solution for these integral equations. This method transforms the integral equation to algebraic equations with unknown Chebyshev coefficients. The high accuracy of this method is verified through some numeric...

Journal: :iranian journal of optimization 2009
j. biazar h. ebrahimi

in this paper, he‘s variational iteration method is applied to fredholm integral equations of the second kind. to illustrate the ability and simplicity of the method, some examples are provided. the results reveal that the proposed method is very effective and simple and for first fourth examples leads to the exact solution.

Journal: :Computational Methods in Science and Technology 2002

Journal: : 2021

Fredholm and Volterra nonlinear possibilistic integral equations In this paper we study the functional obtained from classical of second kind, by replacing there linear Lebesgue with integral.

In this article, a numerical method based on  improvement of block-pulse functions (IBPFs) is discussed for solving the system of linear Volterra and Fredholm integral equations. By using IBPFs and their operational matrix of integration, such systems can be reduced to a linear system of algebraic equations. An efficient error estimation and associated theorems for the proposed method are also ...

Journal: :J. Complexity 1996
Sergei V. Pereverzyev Sergei G. Solodky

We propose a new scheme of discretization for solving Fredholm integral equations of the first kind and show that for some classes of equations this scheme is order-optimal in the sense of amount of used Galerkin information.

2011
Abdallah A. Badr Christos H. Skiadas

We consider a nonlinear Volterra-Fredholm integral equation NVFIE of the second kind. The Volterra kernel is time dependent, and the Fredholm kernel is position dependent. Existence and uniqueness of the solution to this equation, under certain conditions, are discussed. The block-byblock method is introduced to solve such equations numerically. Some numerical examples are given to illustrate o...

2011
Giorgio Gnecco Vera Kurková Marcello Sanguineti

Approximation of solutions of integral equations by networks with kernel units is investigated theoretically. There are derived upper bounds on speed of decrease of errors in approximation of solutions of Fredholm integral equations by kernel networks with increasing numbers of units. The estimates are obtained for Gaussian and degenerate kernels.

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