Open AccessAN EFFECTIVE AND SIMPLE SCHEME FOR SOLVING NONLINEAR FREDHOLM INTEGRAL EQUATIONS
Author(s) -
A. Shahsavaran,
Forough Fotros
Publication year - 2022
Publication title -
mathematical modelling and analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.491
H-Index - 25
eISSN - 1648-3510
pISSN - 1392-6292
DOI - 10.3846/mma.2022.14194
Subject(s) - mathematics , fredholm integral equation , legendre polynomials , simple (philosophy) , lagrange polynomial , nonlinear system , integral equation , quadrature (astronomy) , interpolation (computer graphics) , nyström method , algebraic equation , scheme (mathematics) , fredholm theory , mathematical analysis , gaussian quadrature , computer science , polynomial , animation , philosophy , physics , computer graphics (images) , engineering , epistemology , quantum mechanics , electrical engineering
In this paper, a simple scheme is constructed for finding approximate solution of the nonlinear Fredholm integral equation of the second kind. To this end, the Lagrange interpolation polynomials together with the Gauss-Legendre quadrature rule are used to transform the source problem to a system of nonlinear algebraic equations. Afterwards, the resulting system can be solved by the Newton method. The basic idea is to choose the Lagrange interpolation points to be the same as the points for the Gauss-Legendre integration. This facilitates the evaluation of the integral part of the equation. We prove that the approximate solution converges uniformly to the exact solution. Also, stability of the approximate solution is investigated. The advantages of the method are simplicity, fastness and accuracy which enhance its applicability in practical situations. Finally, we provide some test examples.
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