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Came out to UC San Diego for a sunny afternoon, because of the INTEGIRLS #math contest, which was organized by high school students. Today I learned they also were collaborating with the UCSD AWM chapter. Very resourceful!

It was a real pleasure to meet your community of students and faculty today! Your students are quite keen, and you've guided them onto pathways of high potential. Looking forward to working together!

Caught up with Cezar Lupu, who built up a massive, multi-country #Math Olympiad camp. He’s now at Tsinghua University. The last time we met in person was actually at Tsinghua in summer 2019. In that last summer before the pandemic, Cezar was an instructor at the USA Math Olympiad

Caught up with some friends who have led the national coaching of the Malaysian #math and computer programming Olympiad teams. I first met Suhaimi and Shien Jin 25 years ago at the International Math Olympiad, in Romania. All three of us got involved in helping with education in

Bali

Had a lot of fun in Bogotá today, talking with the Colombian #Math Olympiad camp and catching up with their national coach, Maria Losada. I’ve gotten to know her through many different Math Olympiad interactions. She was the main organizer of the 2013 IMO, and I was her colleague

Good night! In Los Angeles for the weekend. The excuse is that Caltech is running a big math contest for high schoolers.

Omg I met Dr Eugenia Cheng --no advice please-- at the Museum of #Math National Museum of Mathematics ! The first time I heard of her was from her spectacular appearance on Colbert. This is a must-see: youtu.be/mA402F5K47o I got to chat with her about the back story of that appearance. It was improvisational comedy!

Oh my goodness. GPT-o1 got a perfect score on my Carnegie Mellon University undergraduate #math exam, taking less than a minute to solve each problem. I freshly design non-standard problems for all of my exams, and they are open-book, open-notes. (Problems included below, with links to

Got a new library card, with a remarkable randomly generated number! Tons of books are here. I’ve been digging around lately for something. Will tell more very soon. 🙂

I've come up with a way of demystifying e (2.718) for high schoolers. poshenloh.com/e I think it is much more intuitive than how e is currently taught, and could update all of the textbooks. Full article: arxiv.org/abs/2504.10664 In the USA, the first time people learn

Starting another urgent mission: to help bring together our polarized society. Want to help? There's a lot of room for kind and clever high schoolers to directly join in and work with me (more below). And also a lot of room for everyone else. I've been thinking a lot about the

Lunch time

I just made a “Mr. Po” visit at a really remarkable middle school Malesus STEM Innovation Center, in Jackson, Tennessee. The students are really clever and used to actively brainstorming in science, technology, engineering, and #math. The school’s curricular structure is unusual: students are

Spoke in the UK Parliament today (!!!) at the launch event for mathshorizons.uk, to a group of MP's, peers, #math educators, and policy thinkers. It's remarkable that in the UK, there can be a math education initiative which reaches this level, which includes teaching more

Recorded a new collaboration video with Dr Tom Crawford yesterday, and also coincidentally met my Probabilistic Combinatorics professor from 20 years ago! What’s the chance of that? Then met some new acquaintances over dinner, because one of them reached out on Instagram. 😊

Sunny day in London

Romania's new president Nicușor Dan is a remarkable person: #math problem-solving super-genius (two-time International Math Olympiad perfect scorer), personable and friendly, and committed to using his genius to problem-solve for society with an understanding of human nature.

Tons and tons of food delivery bags. DoorDash culture on steroids. Super cheap in China because unfortunately there are so many people needing jobs that the drivers earn very little. And the drivers’ work enriches the company they work for, and it’s been known for years that the

International Math Olympiad Alumni Reunion is open for registration: imof.co/reunion/reunio… It will be July 18–21 in Sunshine Coast, Australia. A few years ago, while I was the national coach of the USA International #Math Olympiad team, I realized it would be valuable to