Existence of Periodic Solutions and Stability of Zero Solution of a Mathematical Model of Schistosomiasis

Figure 2

Coexistence of a stable zero solution (solid squares and circles, 𝑦₀=0.2, 𝑥₀(𝜃)=0.2) and a periodic solutions (dots and hollow squares, 𝑦₀=2,  𝑥₀(𝜃)=2) where 𝐴=0.6, 𝐵=0.4, and 𝑟=0.8.