"If you just say Boston Marathon, it conjures up images of the Boston Marathon."

Thanks, TV commentator. That really paints a picture.

Here's a second, geared mechanism that transforms between cube and octahedron forms. Full video at youtu.be/T9BNMLFHXUw

Coyote prowling Skyline Blvd in broad daylight.

Welcome to Portland

The Fundamental Theorem of Topology!

I'm also a little salty that topologists were so uncomfortable with the empty set as a face of the simplex that they invented a whole algebraic gadget (augmented chain complexes) to avoid talking about it.

🤯

Mediocratized? Averaged? Normalized? Regressed to the mean? Satisficed?

Who else is up triangulating their prisms?
kyleormsby.github.io/math342sprin...

Read America. It’s a romp.

Actually, that's not quite true, as demonstrated by the existence of Palantir.

Nothing challenges my "gate's wide open, come on in!" approach to math education more than this phenotype.

(╯°□°）╯︵ ┻━┻

If you think about it, anything handmade is digital.

Very fun. Have you explored similar mechanisms for dodecahedron / icosahedron duality?

New video, on mechanisms that illustrate the duality between the cube and the octahedron! Here's one of them: a linkage with fabric panels designed by Sabetta Matsumoto.
Full video at youtu.be/T9BNMLFHXUw

Which one of you got your congressperson to intercede? I need to give you and your representative a hug.

We did it, Joe!

I should have dressed up as Jill Clayburgh's character and hired an actor to attend class and deliver That Guy's lines.

It's My Turn (1980) Snake Lemma YouTube video by philsproof

Snake lemma day in topology. Do I show them the clip? www.youtube.com/watch?v=etbc...

From https://www.erdosproblems.com/1196 : PROVED (LEAN) Is it true that, for any x, if A⊂[x,∞) is a primitive set of integers (so that no distinct elements of A divide each other) then ∑a∈A1aloga<1+o(1), where the o(1) term →0 as x→∞? #1196: [ESS68b][Er80,p.101] number theory | primitive sets A conjecture of Erdős, Sárközy, and Szemerédi. Lichtman [Li23] has proved that ∑a∈A1aloga<eγπ4+o(1)≈1.399+o(1). This was solved by GPT-5.4 Pro (prompted by Price), which proved that for any primitive set A⊂N ∑a∈Aa>x1aloga≤1+O(1logx). See the comment section for further refinements and discussion.

While AI attracts a lot of loud hype and haters, some mathematicians are happily using it to knock off unsolved problems. (I'm not saying anyone is "right" here.)

Recently Liam Price prompted GPT-5.4 Pro to prove this conjecture of Erdős:

chatgpt.com/share/69dd1c...

(1/n)

Digital display on coffee machine that says Time since brew 8:27 Min

Happiness is trekking to the break room and discovering that someone just brewed a fresh pot.

Precisely! Absolutely absurd that in the year 2026 there is an article mentioning eight human mathematicians, and they're all men.

The AI Revolution in Math Has Arrived | Quanta Magazine AI is being used to prove new results at a rapid pace. Mathematicians think this is just the beginning.

Quanta is ready to update E.T. Bell's classic to "Men and LLMs of Mathematics". 🙄 www.quantamagazine.org/the-ai-revol...

Very well-deserved! Congratulations!!!!!

what is life if not a series of firewall breaches by DDoS attacks?

... or discussing technical details presently. In the interim, I ask that I be given accolades, a large raise, and a teaching reduction.

After consultation with trusted colleagues, I've decided not to release a recent theorem of mine or its proof. A straightforward corollary would render much of the cryptographic infrastructure behind modern digital life transparent. I will not be circulating the manuscript, sharing it privately, ...

Jeffrey E. Epstein Professor of Ephebophilia

endowed chair for mama's very special boy

the atlantic senior professor of phrenology

fellowship for dogwhistles in the arts and sciences

If this survey were administered with a labeled picture of Quetzalcoatlus, then views would quickly shift.