Orbital stability of the smooth solitary wave with nonzero asymptotic value for the mCH equation

This paper is concerned with orbital stability of the smooth solitary wave nonzero asymptotic value for mCH equationUnder parametric conditions a > 0 and , an interesting phenomenon discovered, that is, there exist three bifurcation speedssuch following conclusions hold. When speed belongs to interval (c1, c2) orbitally stable.When (c2, c3) unstable.When unstable.