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Complex equation draw

Complex equation draw
--- Introduction ---

Complex equation draw is a graphical exercise on the
geometry of complex numbers.
The server will give you an equation on a complex number z, involving real
part, imaginary part, module, or argument.
Then with the help of a java applet, you are asked to draw the set of z
verifying this equation in the complex plane,
with the mouse. You will have a score according to the
precision of your drawing.