Fig. 7
Phase portraits of (1) for different values of c. (a) x2-x3 chaotic attractor (c = 0.5), (b) x2-x3 period-8 attractor (c = 0.958), (c) x2-x3 period-4 attractor (c = 0.965), (d) x2-x3 period-2 attractor (c = 1), and (e) x2-x3 period-1 attractor (c = 1.14).
