Figure 6

The bounded region for the eigenvalues of the controlled model ( 15 ) in the \mathbf{(}{\mathit{p}}_{\mathbf{1}}\mathbf{,}{\mathit{p}}_{\mathbf{2}}\mathbf{)} plane for \mathit{A}\mathbf{=}\mathbf{6}, {\mathit{d}}_{\mathbf{1}}\mathbf{=}\mathbf{0.15}, {\mathit{d}}_{\mathbf{2}}\mathbf{=}\mathbf{0.42}, \mathit{r}\mathbf{=}\mathbf{0.12}, \mathit{\lambda }\mathbf{=}\mathbf{0.75} and \mathit{h}\mathbf{=}\mathbf{8.2}. The blue ∘ line is l_1. The red ∗ line is l_2 and the black ⋅ line is l_3.