Application of Two Delay Differential Equations in the Evolutionary Game of Public Goods Supply

Figure 5

Time delay-free deterministic systems (a)  = 0.2,  = 0.2, (b)  = 0.4,  = 0.4, (c)  = 0.5, and (d)  = 0.2.

(a)

(b)

(c)

(d)