Abstract: This paper is concerned with the fractal diagram of the Julia of the biquadratic polynomials, which is suggested to A. Douady in the last century. By means of the qualitative of those fractal diagram,we verify the property of the connectedness locus of th

Key words: Biquadratic polynomial, Julia set, Mandelbrot set, Connectivity, Non-random complicated motions, Fractal geometry, Escape time arithmetic, Dynamics,Dynamical system, Fractal diagram