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Author Topic: Siegels and Seahorses Forever  (Read 366 times)
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Pauldelbrot
Fractal Senior
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Posts: 2592



pderbyshire2
« on: February 14, 2014, 09:26:05 PM »

Siegels and Seahorses Forever



http://www.fractalforums.com/index.php?action=gallery;sa=view;id=15594

Introducing Triskelion: a rational map with fixed points at the cube root of unity and several complex parameters, three of which exactly determine the derivatives at said fixed points. This means that pretty much any three desired Julia sets can be forced to intertwine -- just dial a Julia by punching in an internal angle and a stability value for each.

Here's the Fibonacci Siegel disk Julia set at 1, a Siegel disk near Elephant Valley at -\frac{1}{2} + \frac{\sqrt{3}}{2}i, and a Julia set from inside a bud in Seahorse Valley at -\frac{1}{2} - \frac{\sqrt{3}}{2}i. The latter results from setting the stability value greater than 1 rather than equal to it, so the fixed point becomes repelling. It's the center of the biggest radiation of white petals a bit down and left from center and directly beneath one of the biggest red Siegel disks.

In this case, we've actually chosen three Fatou sets and the Julia set is technically their shared boundary, but this same system can combine three disconnected quadratic Julia sets to create a spacefilling fractal with the disconnected quadratic Julia sets identifiable inside it, copies of them endlessly intertwined with each other to fractally tile the plane.
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youhn
Fractal Molossus
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Posts: 696


Shapes only exists in our heads.


« Reply #1 on: February 14, 2014, 10:55:36 PM »

Little less exiting than the whole Triple Matchmaker series. Most of the time I love your choice of colors, but this time not really. It looks too flat, too white.
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Pauldelbrot
Fractal Senior
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Posts: 2592



pderbyshire2
« Reply #2 on: February 15, 2014, 10:54:28 PM »

Little less exiting than the whole Triple Matchmaker series. Most of the time I love your choice of colors, but this time not really. It looks too flat, too white.

This one was colored to emphasize the basins and their boundaries. There are other Triskelion images forthcoming that are much more colorful. smiley
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