Figure 4

Trajectories of system (1) with different parameters and initializations in regions (V–\(VIII\)) of Fig. 1. (a)An asymptotically stable solution with the initial value \((0.256326,2.74507)\) and an unstable periodic solution with the initial value \((0.032247,1.0489)\). (b)An asymptotically stable solution with the initial value \((0.30326,5.5545)\). (c)Similarly to (a), an asymptotically stable solution with the initial value \((0.472656,7.07979)\) and an unstable periodic solution with the initial value \((0.58869,7.1607)\). (d)Two stable periodic solutions coexist with the initial values \((0.306325,5.545)\) and \((0.380326,4.505)\), respectively