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On modified method of simplest equation for obtaining exact and approximate solutions of nonlinear PDEs: The role of the simplest equation

MPG-Autoren
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Vitanov,  N. K.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Zitation

Vitanov, N. K. (2011). On modified method of simplest equation for obtaining exact and approximate solutions of nonlinear PDEs: The role of the simplest equation. Communications in Nonlinear Science and Numerical Simulation, 16(11), 4215-4231.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-0029-8BD7-E
Zusammenfassung
The modified method of simplest equation is powerful tool for obtaining exact and approximate solutions of nonlinear PDEs. These solutions are constructed on the basis of solutions of more simple equations called simplest equations. In this paper we study the role of the simplest equation for the application of the modified method of simplest equation. We follow the idea that each function constructed as polynomial of a solution of a simplest equation is a solution of a class of nonlinear PDEs. We discuss three simplest equations: the equations of Bernoulli and Riccati and the elliptic equation. The applied algorithm is as follows. First a polynomial function is constructed on the basis of a simplest equation. Then we find nonlinear ODEs that have the constructed function as a particular solution. Finally we obtain nonlinear PDEs that by means of the traveling-wave ansatz can be reduced to the above ODEs. By means of this algorithm we make a first step towards identification of the above-mentioned classes of nonlinear PDEs. (C) 2011 Elsevier B.V. All rights reserved.