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Mahmood Saeedi Kelishami
Associate Professor, Department of Applied mathematics, Islamic Azad University Rasht Branch, Rasht, Iran
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A Chebyshev collocation method has been presented to solve nonlinear integral equations in terms of Chebyshev polynomials. This method transforms the integral equation to a matrix equation which corresponds to a system of nonlinear algebraic equations with unknown Chebyshev coefficients. Finally, some examples are presented to illustrate the method and results discussed.
|Chebyshev collocation method; Fredholm–Volterra integral equations; Nonlinear integral equation|
|As we know the Chebyshev polynomials are one of the best orthogonal polynomials that have important role particularly in numerical analysis. AChebyshev-matrix method for solving nonlinear integral equations have been presented by Sezer and Doğan . In this study, Chebyshev collocation method, which is given by Akyüz and Sezer , is developed for nonlinear integral equation.|
|Fredholm nonlinear integral equation of the second kind and first kind are given by|
|We suppose that kernel functions and solutions of equations (1) and (2) can be expressed as a truncated Chebyshev series. Then (3) can be written in the matrix form|
THE METHOD FOR SOLUTION OF NONLINEAR FREDHOLM INTEGRAL EQUATIONS
|In this section, we consider Fredholm equation in (1) and approximate to solution by means of finite Chebyshev series defined in (3). The aim is to find Chebyshev coefficients, that is, the matrix A in the matrix form (4). We use (4), (5) and (9) for Si in (6) to get|
THE METHOD FOR SOLUTION OF NONLINEAR VOLTERRA INTEGRAL EQUATIONS
|We now consider the nonlinear Volterra integral equations of the second and first kind as|
|In this section, we consider threeexamples. All results were computed using MATLAB.|
|Example 1. Let us first consider the nonlinear Volterraintegral equation of second kind|
|Here, we use the Chebyshev collocation method to solve nonlinear integral equation of the first and second kind Fredholm–Volterra integral equations of the second kind by transformingour problems into a system of nonlinear algebraic equations. With using Chebyshev collocations points,the unknown vector is Chebyshev expansion coefficients of the solution. Numerical examples show the accuracyof this method.|
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