attractor/21 Multi Chua 5-scroll

Description

> a = 9, b = 14.286, > x0 = 0.1, y0 = -0.2, z0 = 0.3, ``` def multi_chua_V(a, b): m = [0.9/7, -3/7, 3.5/7, -2.7/7, 4/7, -2.4/7] c = [0, 1, 2.15, 3.6, 6.2, 9] formula = lambda x, i: (m[i-1] - m[i])*(abs(x + c[i]) - abs(x - c[i])) h = lambda x: m[5]*x + 1/2*sum([formula(x, index) for index in range(1,6)]) return lambda x, y, z:( a*(y - h(x)), x - y + z, -b*y ) ``` ## References > J.A.K. Suykens & J. Vandewalle, The K.U. Leuven Competition Data: a Challenge for Advanced Neural Network Techniques, (ESANN’2000) 299-304.