Figure 8From: Bogdanov–Takens bifurcation of a Holling IV prey–predator model with constant-effort harvestingWhen \((\mu _{1},\mu _{2})=(0.01,0.015)\) lies in region IV, system (3.1) has three equilibria \(E_{1}^{*}, E_{2}^{*}\) and \(E_{3}^{*}\). \(E_{2}^{*}\) is a hyperbolic saddle. \(E_{1}^{*}\) is an unstable focus and \(E_{3}^{*}\) is a globally stable focusBack to article page