Okay, this is my newest very very favorite meme.

New data from @immcouncil.org proves it: Immigrants fuel the economy, paying $651.9 BILLION in taxes and $1.7 TRILLION in spending power! Check out the data in your state with this interactive tool: data.americanimmigrationcouncil.org/map-the-impa...

I helped build a government AI system. DOGE fired me, rolled the AI out to the whole agency, and implied the AI can do my job and the jobs of the others they've fired. It can't. But, what DOGE accidentally revealed about themselves in the process is fascinating. 🧵

"I'm sorry we went a couple of minutes over today, but some of you come in 5-10 minutes late, so I feel like you owe me." Is that too aggressive?

All websites that depend on NOAA data should display something like this. earth.nullschool.net

1. Today the NIH director issued a new directive slashing overhead rates to 15%. I want to provide some context on what that means and why it matters. grants.nih.gov/grants/guide...

The Conference USA schedule is very elegantly done. Here is a graph of the teams that *don't* play each other this year. With this setup, it's impossible for more than 2 teams to go undefeated, and 8-0 team in conference is guaranteed to make the conference championship.

When including titles/abstracts in a conference program, is it okay to have LaTeX snippets? For example, "Proving \sqrt{2} is irrational".

Best news ever! Registration for the 2025 Grading Conference is OPEN! Please join us to promote grading practices focused on equity & authentic learning. Consider submitting an abstract or volunteering! We value your contributions! #gradingreform Link: www.centerforgradingreform.org/grading-conf...

What are the dimensions of the 1000-piece puzzle that has the fewest boarder pieces?

It kind of feels like it's going to be a long year.

The entire tech industry right now

We’re hosting the LA/MS MAA section in February at Belhaven. If you’re in the area, we’d love to have you come by.

We say a divides b iff you can have a rectangular Lego brick with b total studs and a studs along one side.

Chess Sudoku. Cool. I completed #Ronin #26 www.andrewt.net/puzzles/roni...

Here is another contribution to #genuary #genuary2025 #genuary19 "Op art." openprocessing.org/sketch/2515924

Does this help or no?

Tomorrow, 8:00 am, Discrete Math. It’s going to be a banger

[email protected] I got a 404 error looking up your latex cheatsheet on Dickinson’s service. Do you have it shared somewhere else?

My son had an assignment in class where he had to turn a Christmas tree into something else. I’m such a proud father.

Occasional PSA, 2025 edition: @duetosymmetry.com and I made a graph paper package for LaTeX. Various grid styles (graph, quadrille, hex, iso, dot grid, etc), custom and pre-defined colors. Print out or make templates for your tablet. Github: github.com/mcnees/LaTeX... CTAN: ctan.org/pkg/gridpapers

"just immigrate legally bro"

Teaching Intro to Real Analysis this Spring and trying hard to make it interactive or engaging. Anyone have any resources they’d share? #MathSky🧮

Googling “can dogs eat jicama?"

I’m overwhelmed. Merry Christmas!

Hi Adam, I take your point that the quadratic formula can be presented in a way that does not inspire understanding or affection. And it sounds like that's how it was taught to you. So let me try to make a better case for it. Here's how I discussed it in my book The Joy of x. (1/9)

Got a new phone today and it takes the entire day to do that. BTW, you need 2-step verification to open YouTube now

Associahedra are rich mathematical structures. They are for example connected to binary trees, Coxeter-Catalan combinatorics, root systems, cluster algebras, scattering amplitudes Type H3 associahedra are rarely seen in the wilderness. But I was able to photograph two this morning. #Math #MathSky

13 is the measure of my disappointment

🧮 how many ways can we sum to m given n unique digits? Ex: m = 7, n = 2, we have three sums (1, 6), (2, 5), (3, 4)

I made a Starter Pack for #MathSky, since the one @tienchihmath.bsky.social made (go.bsky.app/66Us7WW), is at max capacity. But I need your help! Let's crowdsource this to make it better. Reply with suggestions. **Please don't feel shy to self-nominate!** go.bsky.app/GiRFQ8D

You can start with the mathsky starter pack: go.bsky.app/66Us7WW

I completely forgot about this video... don't remember making it... BUT apropos to a recent convo on this website. youtu.be/eDharJeRMs8?...

Higher ed friends in the USA: Put your grading down and take the rest of the day off, and tomorrow. And Friday and the weekend. It's Thanksgiving *breaK*. Don't @ me, I don't make the rules.

My younger son loves naming fictional characters by their enneagrams and Meyers Briggs types. INFJ: Anxiety from Inside Out 2. ENFJ: Phil Dunphy Enneagram 3: Thorin Oakenshield

Yeah I was right. It's the worst.

D&D Combinatorics xkcd.com/3015

'For scientists the network is starting to look like home. Academic institutions, scientific journals and conferences, and international organizations such as the World Health Organization have established a presence there in recent days.' www.science.org/content/arti...

How about this one? Chock the vertical line test failure to skewing.

We like to print these cube puzzles to give away to visitors and alum. My lab workers decided to go big!

How to get students to stop canceling a for things like (a + b)/(a + c).

Confirmed.

I teach a class on data science here at Illinois and during the seminar I host a competition for the class called "The Hunt for the Worst Data Visualization." This was my most popular post on Xitter, so reproducing some of the best submissions from previous years here:

The solar system as seen from Mercury. Try it yourself here -> www.testtubegames.com/gravity.html... (tip, you may want to speed up time a bit... 🧪)

What function would look like this?

People of Bluesky! Let’s get to know each other better. What is your all time favorite TV Show? Quote share your answer only in GIF form.

"Wow... this is going to be a crazy week" the professor said to himself for the 15th consecutive Sunday.

One son is debating himself on whether he would like to move to Wakanda or Gondor, and the other just informed us he shared a Google doc of his Christmas list with us.

Prepping classes for the spring? SBG was a game-changer for me.

I think my tweets are starting to import thanks to BlueArk.