Numerical solution of nonlinear integral equations by Galerkin methods with hybrid Legendre and Block-Pulse functions
Subject Areas : Applied MathematicsM. Tavassoli Kajani 1 , S. Mahdavi 2
1 - Department of Mathematics, Islamic Azad University, , Khorasgan Branch, Isfahan, Iran.
2 - Department of Mathematics, Islamic Azad University, , Khorasgan Branch, Isfahan, Iran.
Keywords: Legendre wavelets, Block pulse functions, Fredholm integral equations, Operational matrix,
Abstract :
In this paper, we use a combination of Legendre and Block-Pulse functionson the interval [0; 1] to solve the nonlinear integral equation of the second kind.The nonlinear part of the integral equation is approximated by Hybrid Legen-dre Block-Pulse functions, and the nonlinear integral equation is reduced to asystem of nonlinear equations. We give some numerical examples. To showapplicability of the proposed method.
[1] B.M. Mohan, K.B. Datta, Orthogonal function in systems and control, 1995.
[2] C. Hwang, Y.P. Shih, 1983, Laguerre series direct method for variational prob-
lems , J. Optimization Theory Appl.39, (?), 143149.
[3] E. Kreyzing, Introduction functional analysis with applications, SIAM, John Wi-
ley & Sons, 1978.
[4] K. Maleknejad, M. Tavassoli K, Y. Mahmoudi, Numarical solution of linear Fred-
holm and Voltera integral equation of the second kind by using Legandre wavelets,
J. Science, Islamic Republic of Iran 13 (?) , 161-166.
[5] K. Maleknejad, M. Tavassoli K, Solving second kind integral equations by
Galerkin methods with hybrid Legendre and Block-pulse functions, , Appl. Math.
Comput. 145 (2003), 623-629.
[6] Y. Mahmoudi, Wavelet Galerkin method for numerical solution of nonlinear in-
tegral equation, Appl. Math. Comput. ? 2005, ?{?.
[7] W. Sweldens, R. Piessens, Quadrature formulae and asymptotic error expansions
for wavelet approximations of smooth function, SIAM J. Numer. Anal. 31 (1994),
1240-1264.