#x_(n+1)=theta_1 + w_11*sigma(x_n) + w_12*sigma(y_n)

#y_(n+1)=theta_2 + w_21*sigma(x_n)

sigma is the SigmoidFunction.

"this module exhibits ["ChaoticDymamic"]s for large parameter domains".

a classic example is:

• theta_1 = -2
• w_11 = -20
• w_12 = 6
• theta_2 = 3
• w_21 = -6
• w_22 = 0 (note that this term/weight was not included in y_(n+1) for this reason)

"Its ["LyapunovExponent"]s have been calculated to A_1=0.22 and A_2=-3.3, confirming that the attractor is chaotic. They indicate that the mean expansion is fairly weak so that nearby states separate slowly from each other on a large part of the attractor."