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

Figure 5

The effects of delays on the behavior of solutions: (1) 𝐴=0.4, 𝐵=0.98, and  𝑟=0.5 (a–c) and (2) 𝐴=1, 𝐵=2.4,   and 𝑟=2.5 (d–f) with initial data of 𝑦₀=0,𝑥₀(𝜃)=cos(𝜋𝜃/10).

(a)

(b)

(c)

(d)

(e)

(f)