Project supported by the National Natural Science Foundation of China (Grant No 10172056), the Natural Science Foundation of Zhejiang Province, China (Grant No Y604106), the Foundation of New Century 151 Talent Engineering of Zhejiang Province, the Scientific Research Foundation of Zhejiang Provincial Education Department of China (Grant No 20070568) and the Natural Science Foundation of Zhejiang Lishui University (Grant No KZ04008).
Starting from an improved mapping approach and a linear variable separation approach, a new family of exact solutions (including solitary wave solutions, periodic wave solutions and rational function solutions) with...
Project partially supported by the National Natural Science Foundation of China (Grant No 10172056) and the Science Research of the Education Bureau of Anhui Province, China (Grant No 2006KJ263B). Acknowledgement We wish to thank the referees for their careful reading of the manuscript and their useful remarks which helped us to improve the quality of this paper.
This paper shows that first integrals of discrete equation of motion for Birkhoff systems can be determined explicitly by investigating the invariance properties of the discrete Pfaffian. The result obtained is a disc...