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Wronskian solutions for a nonisospectral variable-coefficient Korteweg-de Vries equation in fluids and plasmas
Yu Xin 1,Gao Yitian 2 *,Sun Zhiyuan 3,Gai Xiaoling 1
1.Ministry-of-Education Key Laboratory of Fluid Mechanics andNational Laboratory for Computational Fluid Dynamics, Beijing University of Aeronautics and Astronautics, Beijing 100191
2.Ministry-of-Education Key Laboratory of Fluid Mechanics and National Laboratory for Computational Fluid Dynamics, Beijing University of Aeronautics and Astronautics, Beijing 100191
3.Ministry-of-Education Key Laboratory of Fluid Mechanics andNational Laboratory for Computational Fluid Dynamics, Beijing University of Aeronautics and Astronautics, Beijing 100191
*Correspondence author
#Submitted by
Subject:
Funding: Specialized Research Fund for theDoctoral Program of Higher Education (No.200800130006), National NaturalScience Foundation of China (No.60772023)
Opened online:26 April 2012
Accepted by: none
Citation: Yu Xin,Gao Yitian,Sun Zhiyuan.Wronskian solutions for a nonisospectral variable-coefficient Korteweg-de Vries equation in fluids and plasmas[OL]. [26 April 2012] http://en.paper.edu.cn/en_releasepaper/content/4475816
 
 
Korteweg-de Vries (KdV)-type equations appear in the shallow waterwaves, ion-acoustic waves in plasmas, lattice dynamics and so on. Inthis paper, the Wronskian technique is applied to investigate anonisospectral variable-coefficient KdV equation in certainnonuniform media with the relaxation effect. Multi-soliton andmulti-positon/negaton solutions for such equation are constructedand verified corresponding to the different eigenvalues of theSchrodinger spectral problem. Based on the relevant magnitude ofthe wave numbers, the solitonic interaction, such as the quasielastic interaction, coherent structure and fission/fusion, areshown graphically.
Keywords:Nonisospectral variable-coefficient Korteweg-de Vries equation in fluids and plasmas; Wronskian; Soliton; Positon; Negaton; Symbolic computation
 
 
 

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