Figure 3From: The mixed nonlinear Schrödinger equation on the half-line(Left) The regions \(D_{1},\dots , D_{4}\) of the complex λ-plane for the case of \(\alpha \beta >0\). (Right) The contours \(L_{1}, \dots , L_{4}\) that define the Riemann–Hilbert problem for the case of \(\alpha \beta >0\)Back to article page