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Homotopy Perturbation Method for Solving Nonlinear Differential- Difference Equations

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Homotopy Perturbation Method for Solving Nonlinear Differential- Difference Equations

Mohamed M. Mousaa,band Aidarkhan Kaltayevb

aDepartment of Basic Science, Benha High Institute of Technology, Benha University, 13512, Egypt

bDepartment of Mechanics, al-Farabi Kazakh National University, 39/47 Masanchi 050012, Almaty, Kazakhstan

Reprint requests to M. M. M.; E-mail: dr.eng.mmmm@gmail.com

Z. Naturforsch.65a,511 – 517 (2010); received June 16, 2009 / revised October 7, 2009

In this paper, the homotopy perturbation method (HPM) is extended to obtain analytical solutions for some nonlinear differential-difference equations (NDDEs). The discretized modified Korteweg- de Vries (mKdV) lattice equation and the discretized nonlinear Schr¨odinger equation are taken as examples to illustrate the validity and the great potential of the HPM in solving such NDDEs. Com- parisons between the results of the presented method and exact solutions are made. The results reveal that the HPM is very effective and convenient for solving such kind of equations.

Key words:Homotopy Perturbation Method; Nonlinear Differential-Difference Equation;

Discretized mKdV Lattice Equation; Discretized Nonlinear Schr¨odinger Equation.

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