ALEA::HENON
Arguments: xinit yinit a b pas [generic-function]
This model is a simplified version of the Lorentz dynamic system. It was suggested by the French astronomer Michel Henon in 1976.
Xn+1 = yn - a*xn 2 + 1 Yn+1 = b*xn with a = 1.4 and b = 0.3 - xinit and yinit are the initial values; - a and b are the system parameters; - pas is the number of iterations, or generated points. The output of this module is a [[list]] of coordinates in two dimensions : ((xinit yinit ) (x0 y0 ) (x1 x2 ) ... (xn yn )) * see the article : David RUELLE in 'Strange Attractors', The Mathematical Intelligencer 2 126-37 (1980).
