Blow-up of solutions to the periodic modified Camassa-Holm equation with varying linear dispersion

Blow-up of solutions to the periodic modified Camassa-Holm equation with varying linear dispersion
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具有变化线性色散的周期性修正 Camassa-Holm 方程的解的放大

DOI:
10.3934/dcds.2016115
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发表时间:
2016-10
影响因子:
1.1
通讯作者:
Shuanghu Zhang
Shuanghu Zhang
中科院分区:
数学3区
文献类型:
--
作者:
Min Zhu;Shuanghu Zhang

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研究了具有变线性色散的周期修正Camassa-Holm方程的爆破机制。我们首先考虑的情况下,线性色散是不存在的,并推导出有限时间爆破的结果。关键特征是溶液与其梯度之间的比率。利用解的连续性和右变换,我们得到了负线性色散情形的爆破准则,并确定了当初始动量密度小于线性色散的大小,且初始数据具有局部弱振荡区域时,有限时间爆破仍能发生.最后,我们证明,当线性色散是非负的,奇异性的形成可以诱导由一个初始数据具有足够陡峭的配置文件。
Considered herein is the blow-up mechanism to the periodic modified Camassa-Holm equation with varying linear dispersion. We first consider the case when linear dispersion is absent and derive a finite-time blow-up result. The key feature is the ratio between solution and its gradient. Using the continuity of the solutions and the right transformation, we then obtain this blow-up criterion to the case with negative linear dispersion and determine that the finite time blow-up can still occur if the initial momentum density is bounded below by the magnitude of the linear dispersion and the initial datum has a local mild-oscillation region. Finally, we demonstrate that when the linear dispersion is non-negative, formation of singularity can be induced by an initial datum with a sufficiently steep profile.
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