Silver, Rollo

Robert P. Munafo, 2008 Feb 20.

Rollo Siler (1928-2008) was an early Mandelbrot enthusiast and editor/publisher of the newsletter Amygdala during the period 1989-1995. After the newsletter ended he created a website (with Gawain Reifsnyder) which was updated until 2000.

Here is an image he liked, part of a classic Seahorse Valley zoom sequence he calls "Jewel Box":

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Rollo Silver's Jewel Box

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Close to the above island is this, which he calls "Concha Quad":

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Rollo Silver's Concha Quad

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His caption for this image candidly describes the discovery of embedded Julia sets:

For a long time I was under the impression that there were just two kinds of "attractors" in M-set images: M-midgets, and Misuriewicz points — such as the tip of the spike at the extreme left of the M-set.

I was thus filled with joy when I discovered Titania's Tiara, having at its center the Concha Quad, which closely resembles the Jewel Box, except for having at its center a brand-new attractor: a strange, glowing plasma.

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