Collision of two solitary waves for CMS method in Eq. (22) with a=0.02 and the comparison of methods CMS and PBX with a=0.2. (a) interaction of two solitary waves; (b) numerical solutions at t=0, t=25, t=40, and t = 60; (c) error of the dissipation rate of mass r; (d) the evolution of total conformal momentum P ∼ n ; (e) the evolution of total conformal mass m ∼ n ; (f) comparison of methods CMS and PBX in the error of dissipation rate of mass with a=0.2.