Naive Stokes? You mean Green's Theorem?

Call for applications: Open Interval, Turbulence #MathSky #MathArt www.simonsfoundation.org/2026/09/09/o...

Open Interval Invites Art-Science Collaborations on ‘Turbulence’

This year’s Open Interval program will fund trios collaborating on projects exploring the theme of turbulence.

simonsfoundation.org

It turns out bringing my dog to class is a total cognitohazard — it’s impossible to learn calculus when you could be interacting with the dog.

Wake up, babe — numbers just turned into epicycles. 🧮

Matt Henderson@matthen.com · 20h ago

Drawing a picture from the continued fraction of a number. The continued fraction terms drive a Fourier series.

I bet we can bankrupt AI companies by convincing them to try computing the full homotopy groups of spheres

Well that's a first for me: I'm trending on Hacker News.

A long time ago, in a thread on Twitter, we were joking about who is more arrogant: physicists or computer scientists? Both fields have a reputation for assuming that other subjects can’t be that difficult. Ridiculous, I know. (1/n) 🧪

Opened facebook for the first time in years and it's serving ads for Modafinil as a 'focus aid'? That seems... bad?

Recommended reading if you want an extensive rundown of the OAI / Buckmaster-Alpöge Navier-Stokes conflict. (This falls short of recommending wanting an extensive rundown.)

Pekka Lund@pekka.bsky.social · 4d ago

Has any mathematical problem been resolved into a divorce?

Mathematics is dead; long live mathematics!

julia 🌋@hypv.bsky.social · 2d ago

mathematics is dead and we have killed it :)

I'm teaching Chapter 2 of Stanley's undergrad algebraic combinatorics book this week and it's wild. He computes the number of walks of length ℓ between two fixed vertices of a hypercube by computing the Fourier coefficients of an indicator function on a subset of (ℤ/2ℤ)ⁿ... ↴

Now ready for you to enjoy: e-infinity.space/picture-book/ #MathArt #MathSky

ꭓle Ormsby 𓆙@e-infinity.space · last wk.

One is never going to capture the artistry of Francis's 𝐴 𝑇𝑜𝑝𝑜𝑙𝑜𝑔𝑖𝑐𝑎𝑙 𝑃𝑖𝑐𝑡𝑢𝑟𝑒 𝐵𝑜𝑜𝑘 with mere algorithms, but I'm pretty stoked that my computer is now generating manipulatable 3d scenes that look like this. #MathSky #MathArt

1

Forcing a win is unfair to the minerals.

Mineral Cup & Ore Cup@mineralcup.bsky.social · 3d ago

After a full audit triggered by the extreme disparity between campaigning vs apparent votes, #Quartz won by a margin of 2 votes over #Asagiite. Please don’t ballot-stuff. #MinCup26 is about about joy, curiosity, & shared enthusiasm. Forcing a win is unfair to the minerals.

What a lovely article about Joan Birman's seven-year mentorship of a teenage neighbor and the results they proved in braid theory. Joan Birman is now 99, and her neighbor is starting graduate school at Princeton. www.nytimes.com/2026/09/06/s...

The 92-Year-Old Mathematician and the Teenage Apprentice

Joan Birman thought her major discoveries were behind her. Then came an email from a young neighbor — a girl who knew little but wanted to learn.

nytimes.com

I know it's wrong, but the temptation is too great — I have to pronounce 'Tomatometer' as if it rhymes with thermometer.

The Calculus Chorus. I'm printing this out on 11x17 paper, taping it to the classroom wall, and pointing at it every day here on out. 🧮

Summer students presenting at the Reed President’s Student Showcase! 🧮

Terry Tao right now:

John C. Baez@johncarlosbaez.bsky.social · 6d ago

Terence Tao says: there's an emerging consensus on how to solve one of the $1,000,000 Millennium prize problems. He says AI may help and lead to new insights - but it may solve the problem in a way that gives no new insights! Read what he wrote here: mathstodon.xyz/@tao/1172078...

Traditional mathematical writing is a linear extension of a poset of ideas and arguments, but Torres's presentation of Turán's theorem finally breaks that mold! 🧮 scroll.press/2026/turan

Turán's theorem, from edges to eigenvalues

Turán's theorem is the founding result of extremal graph theory: among all graphs on $n$ vertices with no clique on $r+1$ vertices, the balanced complete multipartite graph has the most edges. We pres...

scroll.press

leotrs@leotrs.bsky.social · last wk.

1/ A math paper doesn't have to show every reader the same thing. My exposition of Turán's theorem keeps the argument fixed but the presentation is yours: you choose the order, the level of detail, and the notation, and none of it changes the content. www.youtube.com/watch?v=2Nkp...

Spontaneous celebrations break out across Portland, Oregon as it is finally Blundstone season.

"If you can't stand the cuddles, get off of the couch!" — my dogs while smothering me

[Country] built a [device of dubious utility, scalability, or existence]. We should have more inventions like that! ♡ 6.9K

Only in Portland: invited to the breed reveal party for a puppy named Björn.

How do you do, fellow leftists?

One is never going to capture the artistry of Francis's 𝐴 𝑇𝑜𝑝𝑜𝑙𝑜𝑔𝑖𝑐𝑎𝑙 𝑃𝑖𝑐𝑡𝑢𝑟𝑒 𝐵𝑜𝑜𝑘 with mere algorithms, but I'm pretty stoked that my computer is now generating manipulatable 3d scenes that look like this. #MathSky #MathArt

math linguistics 🤝 PIE

I'm done with topology. Now moving on to topophilia and topomyth.

Permits to climb Mt St Helens secured! 🌋🧗‍♂️

Putting it out there that you don't have to believe in AGI to think rogue AIs are going to fuck us up. We took AIs with the coherence of a toddler and technical skills of the entire NSA and made them into swarms and are going to give them drones basically any minute