attractor/21 Multi Chua 2, 4-scroll

Description

> a = 9, b = 14.286, > > q = 1, # double scroll > q = 2, # 2-double scroll > > m = [-1/7, 2/7, -4/7, 2/7, -4/7, 2/7], > c = [0, 1, 2.15, 3.6, 8.2, 13], > x0 = 0.1, y0 = 0.092, z0 = 0.1, ``` def multi_chua(a, b, q, m, c): n = 2*q-1 formula = lambda x, i: (m[i-1] - m[i])*(abs(x + c[i]) - abs(x - c[i])) h = lambda x: m[n]*x + 1/2*sum([formula(x, index) for index in range(1,n+1)]) return lambda x, y, z:( a*(y - h(x)), x - y + z, -b*y ) ``` ## References > J.A.K. Suykens, A. Huang, & L.O. Chua, "A Family of n-Scroll Attractors from a Generalized Chua’s Circuit," AEU, Vol.51, (1997) 131-138.