New entry!
Fiboquadratic Sequences and Extensions of the Cassini Identity Raised From the Study of Rithmomachia
Article by Tomás Guardia and Douglas Jiménez
In collections: Fibonaccinalia, Games to play with friends, History
In this paper, we introduce fiboquadratic...
URL: arxiv.org/abs/1509.03177v3
PDF: arxiv.org/pdf/1509.03177v3

Public petition to ban all 2-column papers as they are unreadable and a complete waste.

Thank you for attending my TED talk.

Mechanical Computing Systems Using Only Links and Rotary Joints
Article by Ralph C. Merkle and Robert A. Freitas Jr. and Tad Hogg and Thomas E. Moore and Matthew S. Moses and James Ryley
In collections: Basically computer science, Things to make and do, Unusual computers
URL: arxiv.org/abs/1801.03534v1
PDF: arxiv.org/pdf/1801.03534v1

Alan Turing is the face of the new £50 note

The Bank of England has announced, following a public poll, that the new £50 note will feature mathematician, cryptographer and computer science pioneer Alan Turing. While this might seem like unambiguous good news, the issues it raises are more complicated than they first appear. Here&#8217;s a guest post from LGBT+ mathematician Calvin Smith with his&hellip; aperiodical.com/2019/07/alan-t

Are you kidding.

Leiden wall formulas: muurformules.nl/

The last time I was in Leiden they were decorating the exterior walls of all their buildings with poems of many different languages. Now they've moved on to the language of mathematics.

AJA: « to jam » (faire de la musique improvisée) en français, c'est : « faire un boeuf »

Spoilers and 3d printer files

When I stack them on top of each other, this is what it looks like. What do you notice?

Here's a I've just made. What can you say about these pieces?

Is anyone already making an LTI provider for serving EPUB books? @baldur, do you know?

“Is it [weird] how saying sentences backwards creates backwards sentences saying how [weird] it is?”

SHOSPLE
COLUPIS

The lovely moment when your calculus professor has to remind you that you're in a calculus lecture and therefore can generally assume all spaces to be hausdorff.

The annual Great Internet Math-off is happening at @blog — view and vote on your favorites!

So far we've had commutativity of log-exponentiation vs weather infovis (aperiodical.com/2019/07/the-bi), the geometry of the Sydney Opera House vs straight lines on a donut (aperiodical.com/2019/07/the-bi), multiplication tables and muffins (aperiodical.com/2019/07/the-bi) and a video on shapes in La Sagrada Familia (shot on location?!) vs an intro to fractals (aperiodical.com/2019/07/the-bi). More daily for roughly a month.

@anne @christianp Wikipedia says the members of this field are called the constructible numbers: en.wikipedia.org/wiki/Construc

You can also call it the quadratic closure of the rationals.

Is there a conventional name for the set of rationals closed under taking square roots? It's not ℝ because it doesn't include the transcendentals, and it doesn't include things like ∛2.

Bot idea: toot daily news headlines accompanied by a screenshot of a 3×3 Civ 2 grid.

For those who haven't heard of en_DK before, it's the "European English" (for want of a better description) locale.

It uses Commonwealth English (en_GB) for strings and ISO-14651-1 for collates.
Dates are in YYYY-MM-DD, time is in 24h HH:MM format, Monday is the first day of the week, comma is the decimal separator, currency is euro and standard paper size is A4.

you see the angry peasants all around me, screaming at me and telling me to shut up about graph theory? well, this is what's called a "hub and spoke" pattern,

A Mastodon instance for maths people. The kind of people who make $\pi z^2 \times a$ jokes.
Use $ and $ for inline LaTeX, and $ and $ for display mode.