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Applicable Analysis
An International Journal
Volume 87, 2008 - Issue 5
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Original Articles

Exact solutions for some non-linear differential equations using complex hyperbolic function methods

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Pages 509-522 | Received 21 Nov 2007, Accepted 11 Jan 2008, Published online: 28 Jul 2008
 

Abstract

Based on computerized symbolic computation, the coth–csch complex hyperbolic-function method is proposed for the general non-linear equations of mathematical physics in a unified way. In this article, we assume that exact solutions for a given general non-linear equations be the superposition of different powers of the coth-function, csch-function and/or their combinations. After finishing some direct calculations, we can finally obtain the exact solutions expressed by the complex hyperbolic function. The characteristic feature of this method is that we can derive exact solutions to the general non-linear equations directly without transformation. Some illustrative equations, such as the coupled non-linear Schrödinger equation, the generalized non-linear Schrödinger-like equation, coupled non-linear Schrödinger KdV system, Davey Stewartson equation and the (2 + 1)-dimensional generalization of coupled non-linear Schrödinger KdV system equation are investigated by this method and new exact solutions are found.

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