Figure 2

Bifurcation diagrams, maximum Lyapunov exponent, and phase portraits for system ( 3 ). (a) Bifurcation diagram of system (3) in \((d,x)\) plane for \(a=3.4\) and \(c=0.2\). (b) Maximum Lyapunov exponents corresponding to (a). (c) Bifurcation diagram in \((d,y)\) plane for \(a=3.4\) and \(c=0.2\). (d)-(f) Phase portraits for \(d=3.58,3.72,3.8\).