News! Grading for Growth is now available as an audiobook!
If you prefer listening to case studies, advice, and history of grading, check it out!
News! Grading for Growth is now available as an audiobook!
If you prefer listening to case studies, advice, and history of grading, check it out!
New in the @marimo.io gallery!
How do you invert a matrix? Let a system reach thermal equilibrium and read the answer from its fluctuations.
Interactive notebook on thermodynamic linear algebra, based on Aifer et al. (2024).👇👇👇👇
Hey look, there I am.
05.03.2026 10:35 — 👍 2 🔁 1 💬 1 📌 0
🧵 The filmmaker, Fahim Hamid, did a fantastic job (in just under 27 minutes!) shedding light on our opaque, top-down political system and the importance of running for County Committee Member positions to create a more active, bottom-up, participatory democracy ✊🏼🔥
www.pbs.org/video/county...
A diagram drawn on a wall, with boxed sequences of numbers connected by arrows
Sometimes you just have to work out an example. Good thing we have a wall covered with whiteboard paint.
05.03.2026 00:04 — 👍 20 🔁 3 💬 2 📌 0
Announcement: the Metro NY section of the MAA will be hosting its annual meeting at St. Thomas Aquinas College on 5/2! Abstract deadline 3/30, early reg 4/10. STAC is close to the NJ and Seaway sections, and we welcome our neighbors. We'll have shuttles from Metro North/NJ Transit.
#MathSky
Discover new numbers numberresearch.xyz
04.03.2026 10:09 — 👍 20 🔁 13 💬 12 📌 14
📢 We urge our leaders to make the right decision and bring back year-round outdoor dining once and for all.
👉🏼 Show your support for year-round outdoor dining by sending a letter: action.openplans.org/support-year...
Hey, NY. It's primary season.
If you see folks with clipboards asking if you are a registered democrat, please stop and help them.
It takes appx. 1 minute to sign a ballot petition.
People want better candidates. We need 1000s of signatures to get on the ballot.
Sick of the collaborators? Sign.
Image reposted to include alt text. Also: to learn more about the Make Billionaires Pay Their Fair Share Act, see @sanders.senate.gov's news release, which has links to—
• Bill text;
• Bill summary; and
• An economic analysis.
share.google/b2w0isUfsKS2...
every single psycho thing Donald Trump does he does only because almost every single federally elected Republican has chosen unilaterally, independently, and with complete freedom to go along with it unconditionally
28.02.2026 22:41 — 👍 3251 🔁 786 💬 32 📌 19I started doing something similar for homework extensions. First time no questions. Second time, we need to meet to chat about why it’s happening, and to see if there is some issue that needs to be addressed. Sometimes it’s a one off thing that’s not likely to reoccur, but if they’re..:
28.02.2026 21:37 — 👍 5 🔁 1 💬 1 📌 0AAAAAAAAAAAAAAAAAAAAAAAHHHHHHHHHH
28.02.2026 06:41 — 👍 738 🔁 314 💬 5 📌 9How much of a role does having a sycophantic AI to which you outsource your critical thinking play in deciding to go to war?
28.02.2026 12:32 — 👍 1 🔁 0 💬 0 📌 0
Dean W. Ball Y @deanwball X.com Think about the power Hegseth is asserting here. He is claiming that the DoD can force all contractors to stop doing business of any kind with arbitrary other companies. In other words, every operating system vendor, every manufacturer of hardware, every hyperscaler, every type of firm the DoD contracts with—all their services and products can be denied to any economic actor at will by the Secretary of War. This is obviously a psychotic power grab. It is almost surely illegal, but the message it sends is that the United States Government is a completely unreliable partner for any kind of business. The damage done to our business environment is profound. No amount of deregulatory vibes sent by this administration matters compared to this arson.
Scary af, by @deanwb.bsky.social
28.02.2026 02:32 — 👍 837 🔁 273 💬 18 📌 10That is going to be a big dog!
28.02.2026 02:35 — 👍 1 🔁 0 💬 1 📌 0The camouflage cup
27.02.2026 21:56 — 👍 3 🔁 0 💬 0 📌 0Happy birthday!
27.02.2026 19:21 — 👍 1 🔁 0 💬 1 📌 0
The International Day of Mathematics (IDM) is approaching fast (March 14th / Pi-Day / Tau over 2 Day). If you want to do some #illustratingMath in preparation for that, the organizers have just released their "color them yourself" posters: www.idm314.org/decorate#pos.... Please share your results!
27.02.2026 16:11 — 👍 4 🔁 1 💬 1 📌 0
NYC here I come. Till Monday.
Appearing/performing at MoMath (twice, Fri eve and Sun at 2pm) and at Stony Brook (Sat at 12 noon) @momath.bsky.social
Hope to see many of you soon.
I hope to find time to share a longer thought about this later, but for now I'll just say two things:
1️⃣ While I may not comment on the NY-07 specifically, I think everything Peter wrote about the RAC's structure is accurate.
2️⃣ SFAIK, Peter is the first and so far only journalist to get it right.
Facts need a story.
Part of telling that story is deciding which facts to include, which to highlight, and which to ignore.
The truth can be gerrymandered by how you divide up the facts.
this is the very obvious game plan, and if you're reading journalism that doesn't at least hint at the possibility, you're not reading journalism at all:
26.02.2026 23:37 — 👍 500 🔁 187 💬 8 📌 5
Learning a second language can be hard. Signing up for Pre-K and 3-K is easy.
Go to myschools.nyc to apply today. Deadline is tomorrow at midnight!
Doing the last stitch on a large colorful crochet project
The last stitch isn’t an exciting explosion, it is just a stitch. The project completes quietly ♥️💙
www.grannylifecrochet.com
@crochet @mathart @done 🧶
Amazing job!
26.02.2026 11:51 — 👍 1 🔁 0 💬 1 📌 0
my local park is full of hundreds of snow sculptures and someone has been adding museum labels
24.02.2026 19:42 — 👍 8139 🔁 2122 💬 97 📌 265
Abstract mathematical code-generated art: Colorful meandering blurry lines on black background. Created with C code using only default operating system tools, by elkement 2026.
I was asking myself: Could I create mathematical art using just the bare minimum of tools that usually come with an operating system? (No python, no JS, no frameworks.)
24.02.2026 15:24 — 👍 72 🔁 12 💬 11 📌 0Mic. Drop. 🎤
23.02.2026 20:24 — 👍 11 🔁 3 💬 0 📌 0No art recently, I'm in Minneapolis and the stress from the occupation is awful. Nothing has changed here except that the news media have left and word about what hell ICE are putting us through isn't getting out now: it is the same, families are still in hiding, ICE are still kidnapping people.
23.02.2026 16:51 — 👍 7 🔁 4 💬 0 📌 0