Technical data for this type of fractal : click here. For the factal here : fn1 = log(), fn2 = log(), fn3 = recip(), fn4 = cos() real(p1) = 6, imag(p1) = 128, real(p2) = 1, imag(p2) = 1, real(p3) = 16, imag(p3) = 1