attractor/20 Shimizu-Morioka

Description

> Lorenz-like: λ = 0.75, ξ = 0.45, > Burke-Shaw-like: λ = 0.81, ξ = 0.1914, ``` def shimizu_morioka(λ, ξ): return lambda x, y, z:( y, (1 - z)*x - λ*y, x*x - ξ*z, ) ```