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A modified double Jacobian elliptic function expansion method under a general function transform, which is more general than the Jacobian elliptic function expansion method under a travelling wave transform, is proposed to construct the exact solutions of nonlinear evolution equations. Some new exact periodic solutions are obtained by this method which include previous solutions, replenishing the known results of the equations.
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Keywords:
- Jacobian elliptic function expansion method /
- nonlinear evolution equation /
- function transform /
- periodic solution
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