(left from g-image search, right from Elias Wegert's
http://www.tu-chemnitz.de/mathematik/preprint/2009/PREPRINT_12.pdf …)
pufferfish patterns are Blaschke products @tomcuchtapic.twitter.com/iD2UQKWDGD
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This is canonical: /Phase Plots of Complex Functions: A Journey in Illustration/ by Elias Wegert and Gunter Semmler, http://www.ams.org/notices/201106/rtx110600768p.pdf …
Owen, National Geographic posted this in their blog so presumably they have videos: https://blog.nationalgeographic.org/2013/08/15/whats-this-mysterious-circle-on-the-seafloor/ …
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