Fig. 2

The 3D, contour and 2D (when y = 10) graphs for the solitary kink soliton solution \(\psi _{1, 5 }\) stated in (21), are plotted for \(\lambda := 4, \mu := 5, \nu := 1, \varrho := 0.2E^{-2},\) \(C:= 0.1E^{-2}, t:= 0, \omega _{0}:= 1, \delta _{0}:= 2, k_{1}:= 1.5\).