Embedded Julia sets within the Mandelbrot set

Get acquainted with the phenomenon of embedded Julia sets in an interactive session with the Java applet Juliette below. Click the gray column to give it keyboard focus (do not click the images). Use the following commands or the buttons below:

Download Juliette. See the context menu for an overview of commands and keyboard shortcuts. Or read this introduction.

Mathematical explanation under construction ... See demo 5 of Mandel.