Christian Lawson-Perfect is a user on mathstodon.xyz. You can follow them or interact with them if you have an account anywhere in the fediverse. If you don't, you can sign up here.

# Christian Lawson-Perfect@christianp@mathstodon.xyz

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Mathstodon.xyz news:
1) I've just suspended a few dozen spam accounts created in the last 24 hours. How annoying! Registration is now closed, until I come up with a better way of stopping them. Any mathstodon user can invite people to join using the form in the preferences page: mathstodon.xyz/invites

2) I've updated the server to Mastodon v2.4.0. Release notes at github.com/tootsuite/mastodon/
Some fun features, including four free-text fields you can show on your profile.

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Hallo, new Mastodon users! Here on mathstodon.xyz we've got a couple of mathematical emoji: and . 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?

The Bulgarian solitaire and the mathematics around it
Article by Vesselin Drensky
In collections: Easily explained, Games to play with friends, History, Puzzles
The Bulgarian solitaire is a mathematical card game played by one person. A pack of $n$ cards is divided into several decks (or "piles"). Each move...
URL: arxiv.org/abs/1503.00885v1
PDF: arxiv.org/pdf/1503.00885v1

Happy Birthday to M.C. Escher!

The paramagnetic and glass transitions in sudoku
Article by Williams, Alex and Ackland, Graeme . J.
In collection: Basically physics
We study the statistical mechanics of a model glassy system based on a familiar and popular mathematical puzzle. Sudoku puzzles provide a very rare example of a class of frustrated systems with a unique groundstate without...
URL: arxiv.org/abs/1212.1649
PDF: arxiv.org/pdf/1212.1649v1

@PgSuper I think Ramanujan alluded to such experiences.

I wonder if some crazy mathematician ever thought of talking to a number as if it was a friend... (Because numbers are friends?)

oh, you like Mikhail Gromov? name five of his papers

Genuinely assumed this was about Prince William and really couldn't work out what the banks could possibly be doing.

Another attempt at setting up a mastodon development environment, another dismal failure.
This time: rails db:setup fails with "must be owner of relation account_domain_blocks". mastodon is the owner of that table. 🤷‍♂️ Postgres gives such terrible error messages!

I've turned account registration on mathstodon.xyz back on. I'm going to spend some time today thinking about how to deter spammers.

#programming idea:

there is nothing more irritating then eg. finding a cool rust crate and not being able to run the examples

...ok, maybe mosquitoes are worse

but other than that!!!! nothing!!!! **literally** nothing!!

Made some visuals like those from the latest Numberphile!

We're looking students to work on compiler / virtual machine things:

unb.ca/research/casatlantic/pr

also a "Research Assistant/Software developer" for the same projects.

Mrs L-P had a very happy accident at the photo printers

Found a roll of receipt paper while cleaning and could finally run a ~real~ ed(1) session // @_xhr_

My new programming language has two types of variable declaration:

constant

and

constn't

big thonk

I figured it was about time to post an here. (Thanks again @christianp for inviting me!)

Hi! I'm Accio. I enjoy , , , , and . I am heavily considering a math-related career, so if you do math for your job, please share!

In my search to explore the lands of Mastodon, I have another account (@acciobooks).

Also, incomplete math project I did: mathwhiz.github.io/vectorpres/