An integrable system with peakon, complex peakon, weak kink, and kink-peakon interactional solutions

An integrable system with peakon, complex peakon, weak kink, and kink-peakon interactional solutions
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具有peakon、复杂peakon、弱扭结和扭结-peakon交互解决方案的可积系统

DOI:
10.1016/j.cnsns.2018.03.019
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发表时间:
2018-10
期刊:
Commun Nonlinear Sci Numer Simulat
影响因子:
--
通讯作者:
Li Jibin
Li Jibin
中科院分区:
其他
文献类型:
--
作者:
Xia Baoqiang;Zhijun Qiao;Li Jibin

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本文研究了具有二次和三次非线性项的可积系统:mt = bux +12 k1 m(u2 − u2 x)x +12 k2(2 mux + mxu),m = u-uxx,其中B,k1和k2是任意常数.该模型是Camassa-Holm(CH)方程的一种立方推广:mt + mxu + 2 mux = 0。该方程是可积的,它的Lax对,双哈密顿结构,和无穷多个守恒律。在B = 0的情况下,研究了尖峰孤子(峰子)、复峰子和多峰子解.特别地,给出了双峰子动力学系统,并详细讨论了它们的碰撞。在B = 0的情况下,首次发现了弱扭结解和扭结峰解。通过比较分析了与CH方程的显著差异。本文还研究了该系统所有可能的光滑单孤立子解。
In this paper, we study an integrable system with both quadratic and cubic nonlinearity: m t = bu x + 1 2 k 1 m (u 2 −u 2 x ) x + 1 2 k 2 (2 mu x + m x u ) , m = u −u xx , where b, k 1 and k 2 are ar- bitrary constants. This model is kind of a cubic generalization of the Camassa–Holm (CH) equation: m t + m x u + 2 mu x = 0 . The equation is shown integrable with its Lax pair, bi- Hamiltonian structure, and infinitely many conservation laws. In the case b = 0 , peaked soliton (peakon), complex peakon, and multi-peakon solutions are studied. In particular, the two-peakon dynamical system is explicitly presented and their collisions are inves- tigated in details. In the case b = 0, the weak kink and kink-peakon interactional solu- tions are found for the first time. Significant difference from the CH equation is analyzed through a comparison. In the paper, we also investigate all possible smooth one-soliton solutions for the system.
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