On the Cauchy problem for a Camassa-Holm type equation with cubic and quartic nonlinearities

In this paper we first investigate the local well-posedness and global existence with large damping coefficient for the Cauchy problem of a Camassa-Holm type equation with cubic and quartic nonlinearities in nonhomogeneous Besov spaces. Then we obtain a blow-up criteria and present norm inflation which implies ill-posedness for the equation in critical Besov spaces.