Figure 4

Graphical presentation of system (1): (a) coexisting bifurcation diagram for 7 < c < 15, (b) basin of attraction in x(0)—z(0) plane with y(0) = w(0) = 1 and c = 7, (c) coexistence of one chaotic attractor and one periodic attractor, (d) coexisting of two chaotic attractors, (e) coexisting of two hyperchaotic attractors.