The Mandelbrot Set and Julia Sets

Patterns Converging to Cycles

On the left is the Mandelbrot set with a point c indicated by the cross-hairs.
On the right is the sequence generated by this c.
The window on the right has real and imaginary parts between -2 and 2, so is not to the same scale as the Mandelbrot set picture.
Remember, the left and right pictures belong to different planes.
The Mandelbrot set is a collection of c-values, while on the right is a sequence of z-values.
To emphasize this distinction, some authors say the Mandelbrot set lies in the Parameter Plane and the sequences (and also all the Julia sets) lie in the Dynamical Plane.
Moving c down slightly from the 3-cycle disc, c enters the big cardioid so the corresponding sequence converges to a fixed point. However, this c is near the point of attachment of a 3-cycle component, and the sequence converges by spiraling around a 3-armed pattern.

Return to stable cycles.