Figure 4From: Riemann–Hilbert approach and N-soliton solution for an eighth-order nonlinear Schrödinger equation in an optical fiberTwo-soliton solution (28) with \({{\tilde{a}}}_{1}=0.3\), \({{\tilde{b}}}_{1}={{\tilde{b}}}_{2}=0.2\), \(\alpha _{1}=\alpha _{2}=\beta _{1}=\beta _{2}=1\), \({{\tilde{a}}}_{2}=\xi _{1}=\xi _{2}=0\). (a) Perspective view of modulus of p; (b) The soliton along the x-axis with different time in Fig. 4(a)Back to article page