## Some mathy tesselating stamp art!

I was recently at the art store for some reason, just browsing. I found the linoleum stamp section at the back and immediately wanted to make some! We had made them in 5th grade art class or something, and I remember liking it a lot, but had never since then. They’re kind of the perfect type of art for me, since I seem to like 3D things with more of a “crafts” element. I like carving/whittling anyway, so this was perfect.

I grabbed a few (pretty cheap), and on the way home thought of what I’d do: make a square stamp with weaving paths, asymmetric, such that it could be stamped out in a grid to either create cool repeating patterns, or random ones.

## Neato sequence art

A while ago I watched this video by Numberphile (a very cool channel!). In terms of the actual math, it’s pretty light, but what I love about it is the idea of creating very cool images via very simple rules.

The idea of it is this. In the video, the guy shows a way of drawing a sequence of numbers (more on that in a minute). You draw a number line, and then you draw a semicircle above the line from the first number of the sequence to the second, with a diameter equal to the distance between the points. Then, you draw a semicircle from the second to third numbers of the sequence in the same way, except this time, the semicircle goes under the number line. You continue this way as long as you want, alternating above/below for the semicircles.

## Dimensionality reduction via Principle Component Analysis in python on face images

Hey there! It’s been a while since I wrote anything other than stuff about travel (oh, don’t you worry, there’s still more of that coming!), so it feels good to write about something like this.

Right now, I’m almost finished with the Andrew Ng Machine Learning course on Coursera. Maybe I’ll write about it sometime, but it’s really, really solid and I’m learning a lot. He’s pretty great at explaining concepts and the course is constructed pretty well. What I really like is that, for the assignments, he’ll take the concept from that week and demonstrate a really interesting application of it (even if it’s a little contrived and may not actually be a practical use for it). Either way, it just gets me to think about the breadth of what this stuff can be applied to.