Acta mathematica scientia,Series B ›› 2023, Vol. 43 ›› Issue (2): 736-750.doi: 10.1007/s10473-023-0220-6

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THE CAUCHY PROBLEM FOR THE CAMASSA-HOLM-NOVIKOV EQUATION*

Mingxuan Zhu1, Zaihong Jiang2,†   

  1. 1. School of Mathematical Sciences, Qufu Normal University, Qufu 273100, China;
    2. Department of Mathematics, Zhejiang Normal University, Jinhua 321004, China
  • Received:2021-11-07 Revised:2022-04-05 Online:2023-03-25 Published:2023-04-12
  • Contact: †Zaihong Jiang, E-mail: jzhong@zjnu.cn.
  • About author:Mingxuan Zhu, E-mail: mxzhu@qfnu.edu.cn
  • Supported by:
    This work was partially supported by the National Natural Science Foundation of China (12071439), the Zhejiang Provincial Natural Science Foundation of China (LY19A010016) and the Natural Science Foundation of Jiangxi Province (20212BAB201016).

Abstract: In this paper, we consider the Cauchy problem for the Camassa-Holm-Novikov equation. First, we establish the local well-posedness and the blow-up scenario. Second, infinite propagation speed is obtained as the nontrivial solution $u(x,t)$ does not have compact $x$-support for any $t>0$ in its lifespan, although the corresponding $u_0(x)$ is compactly supported. Then, the global existence and large time behavior for the support of the momentum density are considered. Finally, we study the persistence property of the solution in weighted Sobolev spaces.

Key words: Camassa-Holm-Novikov equation, local well-posedness, blow-up scenario, infinite propagation speed, global existence, large time behavior, persistence property

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