A lot of you have been asking me what comes after my PhD. Continuing my post-OTIS entrepreneurial adventures (see BOATIS in 2023 and (EC)⁵ in 2024), I’m happy to announce the next chapter: I will be moving to Seoul later this year to start a career in fashion design! New York would have been the… Continue reading Starting a career in fashion design
March 2025 newsflash
Happy Pi Day! Here’s a quick summary of some recent things going on with me: I got my PhD! (I defended my thesis last December.) My multivariable calculus (18.02) notes are published on MIT OpenCourse Ware. The 2025 Teammate Hunt runs from March 28 to April 6. Please check it out! (Yes, I’m on the… Continue reading March 2025 newsflash
Getting to know problems
I recently had a student writing to me asking for advice on problem-solving. The student gave a few examples of problems they didn’t solve (like I tell people to). One of the things that struck me about the message was their description of their work on USAMO 2021/4, whose statement reads: A finite set $latex… Continue reading Getting to know problems
A poset of math programs
There are a lot of different kinds of math enrichment activities now, ranging from olympiads to math circles to tons of summer programs and so on. I work in the competition sphere, and I used to spend a lot of time worrying about whether I took the right side. Now that I’m a bit older,… Continue reading A poset of math programs
OTIS Mock AIME 2025 & USEMO 2024 results
Two pieces of news for high school math contest enthusiasts: OTIS Mock AIME 2025 We're running the OTIS Mock AIME again this year! It'll go from December 19, 2024 to January 20, 2025. New this year is that we're offering two tests, I and II, and you can try either or both. However, unlike the… Continue reading OTIS Mock AIME 2025 & USEMO 2024 results
FrontierMath
This is a short blog post on the FrontierMath benchmark, a set of lots of difficult math problems with easily verifiable answers. Just to be clear, everything written here is my own thoughts and doesn’t necessarily reflect the intention of any collaborators. When you’re setting a problem for a competition like the IMO or Putnam,… Continue reading FrontierMath
Hangul spellcheck for Vim
There’s got to be a better way to do this. Someone please enlighten me. Modern Korean is written in 한글 (Hangul), which uses a syllabic alphabet. It includes spaces between words, unlike Chinese or Japanese, which means that it’s possible to have meaningful spellchecking. So of course one day I decided I wanted to configure… Continue reading Hangul spellcheck for Vim
September newsflash
Publicity announcements for all things Evan: Twitch stream schedule Twitch Solves ISL will resume on September 13, 2024 and September 20, 2024 at the usual time. Then a two-week break (because I'm traveling on both September 27 and October 4), and then continuing on Fridays for some to-be-determined number of weeks. Check the calendar. In… Continue reading September newsflash
Imperative statements in geometry don’t matter
There's this pet peeve I have where people sometimes ask things like what kind of strategies they should use for, say, collinearity problems in geometry. Like, I know there are valid answers like Menelaus or something. But the reason it bugs me is because "the problem says to prove collinearity" is about as superficial as… Continue reading Imperative statements in geometry don’t matter
A proof of Poncelet Porism with two circles
Brian Lawrence showed me the following conceptual proof of Poncelet porism in the case of two circles, which I thought was neat and wanted to sketch here. (This is only a sketch, since I'm not really defining the integration.) Let $latex {P}&fg=000000$ be a point on the outer circle, and let $latex {Q}&fg=000000$ be the… Continue reading A proof of Poncelet Porism with two circles
Power Overwhelming 