Fig. 10

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