Figure 2

Phase portraits in the x - z plane of hyperchaotic complex system ( 2.11 ) for $\mathit{a}\mathbf{=}\mathbf{70}$ , $\mathit{b}\mathbf{=}\mathbf{15}$ , $\mathit{c}\mathbf{=}\mathbf{12}$ , $\mathit{d}\mathbf{=}\mathbf{5}$ and $\mathit{x}\mathbf{=}\mathbf{1}$ , $\mathit{y}\mathbf{=}\mathbf{2}$ , $\mathit{z}\mathbf{=}\mathbf{3}$ , $\mathit{w}\mathbf{=}\mathbf{4}$ .