Fig. 10.

Bifurcations found in (33) for $\epsilon =0$ in the $(C,A)$-parameter plane. Codimension-2: Bogdanov–Takens (BT), resonant homoclinic (Resonant ${\mathit{HOM}}_{\ell }$) and saddle-node homoclinic ($\mathit{SN}\text{-}{\mathit{HOM}}_{\ell }$); codimension-1: saddle-node (SN), Andronov–Hopf (AH), saddle homoclinic (${\mathit{HOM}}_s$ and ${\mathit{HOM}}_{\ell }$), saddle-node of limit cycles (SNPO)