Figure 9

Curve of the real and imaginary part of \(\pmb{z_{2}(t)}\) for fractional-order CVHNN with ring structure ( 51 ) with \(\pmb{\alpha=0.9}\) and \(\pmb{\gamma= 0.2 < \gamma_{0} = 0.3 }\) in (b), (a) and phase portrait of the real and imaginary parts of \(\pmb{z_{1}(t)}\) , \(\pmb{z_{2}(t)}\) with \(\pmb{\alpha=0.9}\) and \(\pmb{\gamma= 0.2 < \gamma_{0} = 0.3 }\) in (c), (d).