My second A-to-Z topic for the year was the Butterfly Effect. Of course I slipped some comic strips into it.

nebusresearch.wordpress.com/20

My third A-to-Z topic was Complex Numbers. I've written about them before, so tried to think a bit about a different angle: why do we trust them?

nebusresearch.wordpress.com/20

The fourth of my A-to-Z topics was Delta. It's a big idea so I tried to trim it to two specific but not quite identical uses of the concept.

nebusresearch.wordpress.com/20

For my fifth A-to-Z topic, I got the suggestion of Exponential. I used the chance to work out a reason behind something we've gotten used to: why is the exponential of an imaginary number on the unit circle?

nebusresearch.wordpress.com/20

The sixth of my A-to-Z topics was Fibonacci. One of my readers hoped to learn a bit about Leonardo of Pisa's biography. This brought me to some amazing discoveries about Fibonacci's biography, and I share it here ...

nebusresearch.wordpress.com/20

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@nebusj Nice writeup. For another piece of mathematics credited to Fibonacci, see en.wikipedia.org/wiki/Congruum

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@11011110 Thank you! That's a nice visual representation of one of Fibonacci's impressive number-theory projects.

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