Figure 3

[Sub-case I(c)] (a) A kink-shaped shock excitation (for \(\Phi\)) and (b) its corresponding electric field (E) are depicted in the \(\xi - \tau\) plane. Upon a space reversal (\(\xi \rightarrow -\xi\)), the left panels (a,b) give their place to the right panels (c, d). Arbitrary fixed values \(A= C =1\) and \(B=-1\) have been considered.