Mathematical Analysis of a Single-Species Population Model in a Polluted Environment with Discrete Time Delays

Figure 5

𝑌𝑍-plane projection of the solution for nonzero exogenous input (𝛾=1.25) with 𝑋(0)=1, 𝑌(0)=1, and 𝑍(0)=5; parameter values are given in Table 1.