Sometimes people ask me how many of my students made the IMO, and if I’m in a bad mood I often give the super snarky reply, “I lost track”.1 That’s actually a white lie. The real answer is “I deliberately don’t keep track”. And in this post I want to explain why. It’s definitely human… Continue reading Pride
New handout: Intro to Proofs for the Morbidly Curious
Downloadable at https://web.evanchen.cc/handouts/NaturalProof/NaturalProof.pdf. I don't know why I thought to write this, but it's been bugging me for a year or two now that I've never seen the answer to "what is a proof" written out quite this way. So here you go. It's a bit weird for me to be writing an article that… Continue reading New handout: Intro to Proofs for the Morbidly Curious
Announcing ⛵IS, the successor to OTIS
It’s with a sense of both sadness and excitement that I am writing to announce that year IX of my math olympiad training program, OTIS, is cancelled. Instead, it will be replaced by a new program that I am starting, named Boat Operations: A Tutorial In Sailing, or ⛵IS for short. This was a hard… Continue reading Announcing ⛵IS, the successor to OTIS
Everything I need is on the ground
For me the biggest difference between undergraduate math and PhD life has been something I've never seen anyone else talk about: it's the feeling like I could no longer see the ground. To explain what this means, imagine that mathematics is this wide tower, where you start with certain axioms as a foundation, and then… Continue reading Everything I need is on the ground
Signal boost for Carina Initiatives full-time position
The Carina Initiatives (https://carina.fund) is a friend of the math education community which has supported organizations like Art of Problem Solving, BEAM, Athemath, and others. They're starting a math talent search organization in the United States and are looking to hire a full-time leader (salary $200K-$250K). Passing this along in case anyone in this space… Continue reading Signal boost for Carina Initiatives full-time position
But look at me now
Last weekend in StarCraft, the world championship at IEM Katowice 2023 saw a so-good-it-must-be-scripted Cinderella story, where Oliveira won the world championship in a totally unexpected way. It was a whole roller-coaster of upset after upset from Oliveira, and up until the grand finals we were all still asking, "this can't be, is this really… Continue reading But look at me now
Japanese EGMO is published!
I'm happy to thank 日本評論社 and their team (Fuma Hirayama, Yuki Kumagae, Taiyo Kodama, Ayato Shukuta, among others) for making the Japanese translation a reality. As well as tripling the length of the errata PDF :) This marks the second translation of the EGMO textbook (a Chinese translation was published a while ago as well… Continue reading Japanese EGMO is published!
Mystery Hunt 2023
This is a retro-post for the Mystery Hunt 2023, for which I played a somewhat minor role on the organizing team (teammate). You can play at interestingthings.museum. There is an ongoing list of write-ups about the hunt being kept at puzzles.wiki, and you may also be interested in the reddit AMA from teammate. Puzzle shoutout… Continue reading Mystery Hunt 2023
A common type-error on the OTIS application
There's a common error I keep seeing on OTIS applications, so I'm going to document the error here in the hopes that I can pre-emptively dispel it. To illustrate it more clearly, here is a problem I made up for which the bogus solution also gets the wrong numerical answer: Problem: Suppose $latex {a^2+b^2+c^2=1}&fg=000000$ for… Continue reading A common type-error on the OTIS application
The silver lining
A while ago someone asked me how COVID had affected the students I worked with. I replied that, on average, the pandemic had tripled my students' productivity. And I'm gonna brag about it like the proud teacher I am.
Power Overwhelming 