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arXiv 1804.04885math.AP
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广义修正Camassa-Holm方程峰子的稳定性

Stability of peakons for the generalized modified Camassa-Holm equation

Zihua Guo, Xiaochuan Liu, Xingxing Liu, Changzheng Qu

摘要:

本文研究了广义修正Camassa-Holm(gmCH)方程的峰子的轨道稳定性,它是修正Camassa-Holm(mCH)方程的自然高阶推广,并允许Hamilton形式和单峰.我们首先证明了单峰是偏微分方程的通常弱解。给出了一些符号不变性质和守恒密度。其次,通过构造相应的辅助函数$h(t,\,x)$,建立一个关于两个守恒密度与近似解的最大值之间的微妙的多项式不等式,验证了gmCH方程单峰态的轨道稳定性.我们介绍了一种新的方法来证明关键的不等式,这是不同的,用于mCH方程。这扩展了mCH方程峰子稳定性的结果(Comm. Math. Phys.,322:967-997,2013)成功地应用于高阶情况,并且有助于理解高阶非线性如何影响色散动力学。

英文摘要:

In this paper, we study orbital stability of peakons for the generalized modified Camassa-Holm (gmCH) equation, which is a natural higher-order generalization of the modified Camassa-Holm (mCH) equation, and admits Hamiltonian form and single peakons. We first show that the single peakon is the usual weak solution of the PDEs. Some sign invariant properties and conserved densities are presented. Next, by constructing the corresponding auxiliary function $h(t,\,x)$ and establishing a delicate polynomial inequality relating to the two conserved densities with the maximal value of approximate solutions, the orbital stability of single peakon of the gmCH equation is verified. We introduce a new approach to prove the key inequality, which is different from that used for the mCH equation. This extends the result on the stability of peakons for the mCH equation (Comm. Math. Phys., 322:967-997, 2013) successfully to the higher-order case, and is helpful to understand how higher-order nonlinearities affect the dispersion dynamics.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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