On the Exp-function method for constructingtravelling wave solutions of nonlinear equations

摘要

The Exp-function method or some similar direct methods have been applied by many researchers to the construction of "new" solutions to nonlinear differential equations. In this paper, we demon-strate that some of those so-called "new" solutions can always be transformed into a uniform for-mula, which can be obtained by a very simple integral in fact. Consequently, we have reasons to believe that it should take more careful checking of computations if "different" solutions generated by using the Exp-function method and some similar direct methods are really different from the known ones.