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In this paper, the F-expansion method is revised by adding a term with negative index with constant c,then the irregular wave solutions are avoided. By using this method, different new periodic wave solutions expressed by the generalized KdV equation are obtained.In the special cases,these periodic wave solutions degenerate to the corresponding Jacobi elliptic function solutions,solitary wave solutions or trigonometric function solutions.
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Keywords:
- homogeneous balance principle /
- F-expansion method /
- generalized KdV equation /
- solitary wave solution
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