Quarterly of Applied Mathematics

Quarterly of Applied Mathematics

Online ISSN 1552-4485; Print ISSN 0033-569X

   
 
 

 

Orbital stability of peakons and multi-peakons for a generalized quintic-septic Camassa-Holm type equation


Authors: Dandan He, Tongjie Deng and Kelei Zhang
Journal: Quart. Appl. Math. 83 (2025), 59-96
MSC (2020): Primary 37K45; Secondary 35G20, 35D30
DOI: https://doi.org/10.1090/qam/1699
Published electronically: June 21, 2024
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Abstract: In this paper, we consider the generalized quintic-septic Camassa-Holm (gqsCH) equation, which is actually an extension of the quintic CH equation and the septic CH equation. We first prove the existence of the single peakon. Then, by constructing certain Lyapunov functionals, we prove the stability of peakons in the energy space $H^1(\mathbb {R})$-norm. Finally, we also prove that the sum of $N$ sufficiently decoupled peakons is orbitally stable in the energy space by using energy argument, combining the method of the orbital stability of single peakons with monotonicity of the local energy norm.


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Additional Information

Dandan He
Affiliation: School of Mathematics and Computing Science, Guilin University of Electronic Technology, Guilin 541004, People’s Republic of China
Email: h1362740596@163.com

Tongjie Deng
Affiliation: School of Mathematics and Physics, Center for Applied Mathematics of Guangxi, Guangxi Minzu University, Nanning 530006, People’s Republic of China
MR Author ID: 1503929
Email: tongjiedeng1@163.com

Kelei Zhang
Affiliation: Guangxi Colleges and Universities Key Laboratory of Data Analysis and Computation, School of Mathematics and Computing Science, Guilin University of Electronic Technology, Guilin 541004, People’s Republic of China
ORCID: 0000-0002-9239-1410
Email: keleizhang@163.com

Keywords: Generalized quintic-septic CH equation, peakons, multi-peakons, orbital stability
Received by editor(s): January 26, 2024
Published electronically: June 21, 2024
Additional Notes: This work was supported by the Guangxi Key Laboratory of Cryptography and formation Security (No. GCIS202134).
Tongjie Deng is the corresponding author.
Article copyright: © Copyright 2024 Brown University