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Sep 06, 2023

Edit Slice of life of the OTIS GM

Here’s a snapshot of what running OTIS looks like these days. Starts from last Sunday afternoon until Monday lunch. Timestamps indicate when the action was completed (rather than started).

  • Sunday 13:04: Process a late financial aid request from someone who forgot to request it earlier.
  • Sunday 13:14: Edit OTIS website to clarify that if you haven’t had your registration approved within 48 hours, then you should email Evan to ask.
  • Sunday 13:15: Process a student who wants to drop the fall semester and come back to re-join in the spring.
  • Sunday 13:55: Answer a question from a student on Discord on applying AM-GM on the inequality that I was trying to do in my head when I failed my driving test 11 years ago.
  • Sunday 14:04: Fix a reported typo in the problem statement of China TST 2015/2/3 in the OTIS …
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Aug 30, 2023

Edit Things to tell 18-year-old Evan

Early in 2023 the MIT Undergraduate Math Association had an event where course 18’s could get paired with a graduate student and chat over coffee. So naturally I got asked what I wish I knew as an undergraduate. This post records some subset of the things I said.

  1. Undergraduate math isn’t deep after all — it’s broad but shallow. (Graduate school is a different story.) For years, I was told that when I got to university, math would be way harder than in high school, because blah-blah-blah contests aren’t real math blah-blah-blah. Turns out I was somewhat misled.

  2. I wish I had taken fewer math classes. For someone that’s taken circa 30 semesters of math classes, I remember astonishingly little of what was covered. All too often I’ve had the rather depressing experience of not understanding chapters of Napkin, despite being the author.

    Time as …

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Aug 26, 2023

Edit Twitch & USEMO Announcement

Twitch Solves ISL Season 3

I’ll be resuming streaming live solves of math problems this fall!

As usual, the stream runs at 5pm Pacific / 8pm Eastern on Fridays, for 2-4 hours per stream usually.

The dates of the first ten streams are currently scheduled (tentatively; these move around a lot) as:

  • ~~Friday September 15~~ Sunday September 17 (note unusual date)
  • Friday September 22
  • Friday September 29
  • Friday October 27
  • Friday November 3
  • Friday November 10
  • Friday November 17
  • Friday November 24
  • Friday December 1
  • Friday December 8

The holiday era (late December / early January) is always a big toss-up, so I’m holding off on scheduling those dates until I have a bit more clarity on my plane tickets those months. We’ll also probably be continuing in the spring semester as well — keep an eye out at https://web.evanchen.cc/videos.html for updates on that.

Tune …

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Aug 09, 2023

Edit Agency

Sometimes my OTIS students suggest features or things for the OTIS website, and I reply “submit a pull request”. I’m usually half-joking when I say this, because I acknowledge that I’m essentially saying “please do the work for me”.

But part of me isn’t joking. Because, one of the things I’ve grown to most value in gifted education is developing self-agency for my students.

If you’re reading this blog post, you’re likely to have good thinking abilities. You have the capacity to go from point A to point B, to teach yourself geometry from online resources (or a certain print textbook, I suppose), to put two and two together unsupervised, and so on. This gift is rarer than you think.

So let me tell you a secret: if you don’t know how to submit a pull request, you can teach yourself.

I have …

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Jul 03, 2023

Edit What I would add to the K-12 list

I often gripe about how standard K-12 education is overly focused on specific knowledge (how to solve a quadratic, memorizing dates for history, etc.) rather than general skills (e.g. “how to figure out how to solve a quadratic”). On the other hand, I understand why; teaching general skills is much more difficult than preparing a cookbook.

So now I will instead gripe about specific things that should be taught and aren’t.

Any amount of programming or computing literacy

To me the following are all comparable:

  • Refusing to learn how to use Google Docs, and shrugging it off by saying “I’m not planning to be a writer”.
  • Refusing to learn how to use a spreadsheet, and shrugging it off by saying “I’m not planning to be an accountant”.
  • Refusing to learn how to use a shell or git, and shrugging it off by saying “I’m not …
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Jun 03, 2023

Edit Pride

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”.The good-mood answer is “a lot”.

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 nature to be happy when your students succeed, the same way it’s human nature to be happy when your selfies get hearts. In moderation, that seems fine. I think it’s unlikely I ever reach a point where I never brag about OTIS at all.

But there is a fine line between the following two implications:

  • “I’m super proud of my kids, look what they did.”
  • “I’m super proud of myself, look what my kids did.”

Without naming anyone in particular, I …

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Apr 30, 2023

Edit 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 contains “you can stop reading here” as the second sentence, but first time for everything, I guess.

Apr 01, 2023

Edit Announcing ⛵IS, the successor to OTIS

Time to set sail.
Time to set sail.

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 decision for me to make, but it’s been with me forever. I’ve been staring at the edge of the water long as I can remember, never really knowing why, and now it’s time to answer that calling.

Why sailing instead of math?

  1. Sailing is a more active and physical experience: Sailing involves being out on the water, feeling the wind and the waves, and physically maneuvering the boat. This can be a more engaging and immersive experience compared to sitting at a desk and working on math …

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Mar 11, 2023

Edit 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 you build upwards on it. At first learning math felt like slowly climbing up this tower. When I reached a landmark, it felt like I was on the balcony of the 30th or 50th or 100th floor, enjoying the view, with an appreciation of the floors I had ascended to get here.

In theory, proofs in math can be formalized as a long sequence of logical steps from the axioms that could be computer-verified. This turns out to way too cumbersome to actually do in practice given the current state of technology (though …

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Feb 23, 2023

Edit 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 might be interested in applying or knows someone who might be. The link to apply is:

https://carina-initiatives-inc.breezy.hr/p/4ff029962ddc-executive-in-residence-math-talent-search

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