arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2006.09516math.APmath-phmath.DSmath.MPnlin.PSnlin.SI
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Camassa-Holm方程中峰值周期波扰动的增长,

Growth of perturbations to the peaked periodic waves in the Camassa-Holm equation,

A. Madiyeva, D. E. Pelinovsky

摘要:

重新讨论了Camassa-Holm方程中的峰值周期波。线性化的发展方程的峰值周期波的扰动和线性化的不稳定性被证明在$H^1$和$W^{1,\infty}$规范。$H^1$中的扰动动力学与两个守恒量的存在有关,并且由于这两个守恒量而在全非线性系统中是有界的。另一方面,在Camassa-Holm方程的非线性演化过程中,对峰值周期波的扰动以$W^{1,\infty}$范数增长,并可能在有限时间内爆破.

英文摘要:

Peaked periodic waves in the Camassa-Holm equation are revisited. Linearized evolution equations are derived for perturbations to the peaked periodic waves and linearized instability is proven both in $H^1$ and $W^{1,\infty}$ norms. Dynamics of perturbations in $H^1$ is related to the existence of two conserved quantities and is bounded in the full nonlinear system due to these conserved quantities. On the other hand, perturbations to the peaked periodic wave grow in $W^{1,\infty}$ norm and may blow up in a finite time in the nonlinear evolution of the Camassa-Holm equation.

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