Christian Lawson-Perfect @christianp@mathstodon.xyz

@christianp OK, but your name is now "C. Lawper".

New entry!
Fractal Sequences
Web page by Clark Kimberling
In collections: Easily explained, Fun maths facts, Integerology, Puzzles
Fractal sequences have in common with the more familiar geometric fractals the property of self-containment. An example of a fractal sequence is 1, 1, 2, 1, 3, 2, 4, 1, 5, 3, 6, 2, 7, 4, 8, 1, 9, 5, 10, 3, 11, 6, 12, 2, 13, 7,...
URL: https://faculty.evansville.edu/ck6/integer/fractals.html
Entry: http://read.somethingorotherwhatever.com/entry/FractalSequences

Fun fact: each book scanned for the Internet Archive has a unique identifier, usually the title of the item, or its first 16 characters; the volume number, or 00 if there isn't one; and the first 4 characters of the author. So:

@esoterica Rafael Ball speculates the main reason for the increasing percentage of titles with a question mark is marketing & sees the increase as a sign for increased publication pressure.

Could we use this to monitor our success in fighting publish-or-perish?

**i have updated this post with the developer’s correct name** Hey just found out about this cool app called Emergency Chat! It’s on App Store and google play, and is made specifically for when you’ve gone into a nonverbal anxiety attack. It was made by Seph “Persephone” De Busser, an autistic computer science student. You just open it, hand someone your phone, it shows this cool message and then you can communicate via the chat. It’s like texting kinda but you’re both on the same phone. Super handy, right? You can even customize the alert message. Download it if you think it’d be helpful 😊

@christianp there's a hyperbolic quilt pattern, based on the hyperbolic soccerball tiling. You can glue or tape paper together to visualize spaces of negative curvature, though knitting or crocheting works much better. I designed a construction set toy originally to illustrate spaces of negative curvature.

https://www.thingiverse.com/thing:2491050

@christianp "To get started, go to your local arts and crafts store and pick out a few brightly-colored sheets of Poincaré half-plane."

the road is cloopsend

@dudeney_puzzles this one's doing my nugget in

167. THE WIZARD'S CATS. A wizard placed ten cats inside a magic circle as shown in our illustration, and hypnotized them so that they should remain stationary during his pleasure. He then proposed to draw three circles inside the large one, so that no cat could approach another cat without crossing a magic circle. Try to draw the three circles so that every cat has its own enclosure and cannot reach another cat without crossing a line.

Reading this fantastic graphic novel called "Prime Suspects". It's all about analytic number theory in metaphors.

It has amazing one-liners like:

if you take the divisor, and divide it into the dividend, and get the answer, and the answer is wrong, and you get so frustrated you set your work on fire, what you're left with is the cremainder