Fig. 11

Behaviour of (33) on the Poincaré disc for \(\varepsilon =0\), along the SN-curve \(A_{\mathrm{sn}}^{+}(C)=\frac{C^{2}}{4}\). For \(C\le \frac{1}{2}\), the point \(p_{a}\) connects to the SN point \(p_{\pm}\). At \(C=1\), a BT point \(p_{\pm}\) occurs, not connected to \(p_{a}\), however