Figure 4From: Auditory streaming emerges from fast excitation and slow delayed inhibitionPhase portrait for system (6). Purple and green lines show orbits converging to stable equilibria \((1,1)\) and \((0,0)\), respectively (black circles). Black arrows indicate the direction of convergence. The \(u_{A}\)- and \(u_{B}\)-nullclines are shown in blue and red, respectively. Yellow and orange lines show the separatrices of the degenerate saddle \((s_{1},s_{2})\) (red circle), where \(s_{1}=(b \tilde{s}_{A}-c+\theta )/a\) and \(s_{2}=(b \tilde{s}_{B}-c+\theta )/a\). More details are in the Supplementary Material 1.1Back to article page