Symmetry analysis, persistence properties and unique continuation for the cross-coupled Camassa-Holm system

Abstract

In this paper, we study symmetry analysis, persistence properties and unique continuation for the cross-coupled Camassa-Holm system. Lie symmetry analysis and similarity reductions are performed, some invariant solutions are also discussed. Then prove that the strong solutions of the system maintain corresponding properties at infinity within its lifespan provided the initial data decay exponentially and algebraically, respectively. Furthermore, we show that the system exhibits unique continuation if the initial momentum \begin{document}$m_0$\end{document} and \begin{document}$n_0$\end{document} are positive.