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Hallo, new Mastodon users! Here on we've got a couple of mathematical emoji: :gauss: and :lovelace:. I'd love to add some more. If you can make a PNG image the same size as those, send it to me and I'll add it. Faces of famous mathematicians are an easy place to start; could we have some shapes, polyhedra, or other mathographics too?

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.

Identify the error correcting code. These cards came with my daughter's new toy

@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 word 'hyperboligami' popped into my head this morning and now I need to make it happen

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: is now running Mastodon v2.9.2!
The big new feature this time is the single-column layout, which looks more like standard Twitter. It's the default layout for new users. Existing users can switch to it on the preferences page.
Full release notes:

that went unexpectedly smoothly! The asset compilation step was loads quicker, too.
This makes me suspicious might go up and down a bit while I try to upgrade. The server needs a distribution upgrade, so it's going to be fiddly

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

has a banner up saying it's now 20 years old.
I looked, and I've been a member for 18 of those. Crikey!
No points to anyone who works out my secret MeFi pseudonym

I've just discovered the film streaming/archive service and if you have a public or university library membership you really should check to see if you can get access to it

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A Mastodon instance for maths people. The kind of people who make \(\pi z^2 \times a\) jokes.

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