Fig. 5From: Neural Excitability and Singular BifurcationsSketch of singular limit bifurcation diagram in \((a,c)\) parameter space: singular Bogdanov–Takens and saddle-node homoclinic (SNIC) at the origin (blue); singular Andronov–Hopf branch (red dashed) and cusp bifurcation + saddle-node branches (black); see Fig. 4 for the corresponding cases (a)–(d) along the singular AH branchBack to article page