FIG. 5.

Input-driven chaos. (a),(b) Near the discontinuous chaotic transition (in region 2 in Fig. 7), static input I^h (with I^r = I^z = 0) can push a stable system (a) to chaotic activity (b). (c),(d) In the purely chaotic state [(c), g_h = 3.0], input has the familiar effect of stabilizing the dynamics (d). The elements of the input vector I^h are random Gaussian variables with zero mean and variance ${\sigma }_{{\beta }_h}^2$.