# Iterated Maps Using Complex, Dual, and Split-Complex Numbers

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The classical iterated complex number mapping is a quadratic function of the form with the seed and a complex constant . A complex number is a member of a filled-in Julia set if it is a seed for a mapping that remains bounded after a large number of iterations. Different values of will produce different Julia sets, and any constant associated with a non-empty Julia set is a member of the Mandelbrot set. This Demonstration offers images of Julia and Mandelbrot sets on complex, dual, or split-complex planes. The left panel shows the Mandelbrot set containing values of constant that are associated with non-empty iterated quadratic Julia sets for the selected number type. You can select different values of the constant with the mouse, and the corresponding Julia set, if one exists, appears on the right.

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Contributed by: Fred Klingener (March 2011)

Open content licensed under CC BY-NC-SA

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