Abstract
In this paper, we consider the Camassa-Holm equation with kappa not equal 0 on the real line. We establish certain conditions on the initial datum to guarantee that the corresponding solution exists globally or blows up in finite time. Infinite propagation speed is proved in the following sense: the corresponding solution u(x, t)+kappa with compactly supported initial datum (u(0)(x) + kappa is an element of C(0)(infinity)(R)) does not have compact x support in its lifespan. (C) 2010 Elsevier Ltd. All rights reserved.