Abstract
This paper devotes to present analysis work on the fifth order
Camassa-Holm (FOCH) model recently proposed in [28]. Firstly, we
establish the local and global existence of the solution to the FOCH
model. Secondly, the infinite propagation speed is obtained, in other
words, when the initial data u0(x) has a compact support, the
corresponding solution u(x, t) does not have a compact x-support any
longer in its lifespan. Finally, we discuss the long time behavior of
the support of momentum density with a compactly supported initial data.