## Fun with Zio Chris: September 2015

Background

All of these visualizations, and they are visualizations, were created in the context of teaching my nephew programming in Javascript. They are meant to be fun examples of beautiful things from math, ones that we can explore by programming. Thanks to "Superstar" KB for the impetus to do these explorations!

Prelude

Wall Drawing 256

Sol Lewitt was one of the founders of Conceptual Art, and while I would not put myself exactly in that camp (the explanation for which will have to wait for another day), it is only fitting to have something here related to his work. Interestingly enough, after I did this page, I came across an earlier, closely related work by Casey Reas. Reas is one of the inventors of the Processing programming language, which has inspired me, and which I have used for some of myprojects.

Exploring Fractals

Exploring fractals is like photographing nature: the fractals are there, even discovered by others, but your exploration is your interpretation. All of these examples are meant to be explored

Mandelbrot set

Practically everyone, at least of a certain age, who does algorithmic art has done their own version of exploring the Mandelbrot set. My first one was in HyperCard. The Mandelbrot set is still mesmerizing

Burning Ship Fractal

I hadn't looked at fractals in a long time, but I found this one, along with many other wonderful examples, on Paul Bourke's pages. The name and our reactions to the visualization are an indication of how strong our inclination is to interpret what we see in terms of familiar patterns and concepts (pareidolia). Although Wikipedia (and other sources) say that pareidolia is the recognition of a pattern "where none exists", that seems too strong, to me. While certainly there is no intent to create the patterns seen in the objects, pareidolia seems different from illusions, which typically do not rely on our pattern recognizing abilities.

Lorenz Attractor

The Lorenz attractor is another classic, and like the Mandelbrot set, it is almost obligatory to create your own version. The examples include Lorenz's original one, as well as some more unusual ones, from my own explorations.
Lorenz's work on this attractor led to the coining of the term "butterfly effect" — the idea that a small change in one place and time can lead to large differences in another place and time. The
Wikipedia butterfly effect page also mentions a story by Ray Bradbury with a similar idea, but almost a decade before Lorenz's work. I still remember that story.

De Jong Attractor

Some things just call to you. When I first saw the De Jong attractor on Paul Bourke's page, I knew that I would eventually create my own version. And I did.