Fig. 10.

Plots of the cost function $c_{63}$ for several values of ${ϵ}_2$ and two choices of $({ϵ}_1,\xi )$, the same optimistic (blue) and pessimistic (red) choices already used in the panels of Fig. 9. The remaining parameter values are the ones used in Fig. 6. The minima of the cost function occur at ${ϵ}_2=0.268$ (optimistic case), and ${ϵ}_2=0.186$ (pessimistic case). (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)