Figure 2From: Hybrid control of Hopf bifurcation in a Lotka-Volterra predator-prey model with two delays Behavior and phase portrait of an uncontrolled system ( 1.2 ) with \(\pmb{\tau_{1} = 0.8 > \tau_{1}^{0}}\) , \(\pmb{\tau_{2} = 3.0}\) . Hopf bifurcation occurs from the positive equilibrium \(E_{*}(x^{0},y^{0}) = (\frac{2}{3}, \frac{1}{6})\).Back to article page