The periodic Cauchy problem for a two-component non-isospectral cubic Camassa-Holm system

The periodic Cauchy problem for a two-component non-isospectral cubic Camassa-Holm system
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二分量非等谱立方 Camassa-Holm 系统的周期性柯西问题

DOI:
10.1016/j.jde.2019.08.043
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发表时间:
2020-01
影响因子:
2.4
通讯作者:
Qiao Zhijun
Qiao Zhijun
中科院分区:
数学2区
文献类型:
--
作者:
Lei Zhang;Qiao Zhijun

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本文研究了两分量非等谱三次Camassa-Holm系统的周期Cauchy问题,其中包括Fokas-Olver-Rosenau-Qiao(FORQ)或修正的Camassa-Holm(MCH)方程和两分量MCH系统作为两种特殊情况.该系统是可积的意义下,拥有一个非等谱的Lax对的频谱依赖于时间t,并承认多峰子解的显式形式。在Besov空间B 2,rs(T)(s> 3/2,1≤ r≤∞)中,利用Friedrichs正则化方法,Littlewood-Paley分解理论和Besov空间中的输运理论,建立了系统的局部适定性.然后我们得到了一个精确的爆破准则,它依赖于参数α(t)和γ(t).此外,利用系统的内在结构,我们得到了一个新的关于初值和参数的充分条件下强解的爆破结果。整个证明过程依赖于一个新推导的输运方程,该方程涉及沿特征曲线的非局部速度项沿着。
In this paper, we study the periodic Cauchy problem for a two-component non-isospectral cubic Camassa-Holm system which includes the Fokas-Olver-Rosenau-Qiao (FORQ) or modified Camassa-Holm (MCH) equation and the two-component MCH system as two special cases. The system is integrable in the sense of possessing a non-isospectral Lax pair with the spectrum depending on time t, and admits multi-peakon solutions in an explicit form. Furthermore, we establish the local well-posedness for the system in the Besov space B 2, r s (T) with s> 3/2, 1≤ r≤∞, where the key ingredients include the Friedrichs regularization method, the Littlewood-Paley decomposition theory, and the transport theory in Besov spaces. Then we derive a precise blow-up criteria, which is dependent of the parameters α (t) and γ (t). Moreover, by the intrinsic structure of the system, we obtain a new blow-up result for strong solutions with sufficient conditions on the initial data and parameters. The entire proof procedure relies upon a newly derived transport equation which is involved in nonlocal velocity term along the characteristic curves.
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