The Mandelbrot Set and Julia Sets

Scalings in the Mandelbrot Set

Hurwitz-Robucci scaling - Universal Function Scaling Relation

Now we find a scaling relation for the gn(ε). Recalling that rn = 4n/6, we see
gn+1(4ε) = fn+1(-2 + 4ε/rn+1)
= fn+1(-2 + ε/rn)
= fn(-2 + ε/rn)2 + (-2 + ε/rn)
= gn(ε)2 - 2 + ε/rn
Taking the limit as n → ∞, and letting g(ε) = limn → ∞gn(ε), we obtain
g(4ε) = g(ε)2 - 2

Return to Hurwitz-Robucci scaling.