This is a short advertisement announcing that the OTIS Mock AIME 2024 is out.
The short version is that I wanted to give my students a chance to try their hand at problem composition,
which they took enthusiastically, and from their submissions I chose 15 problems to replicate an AIME.
There’s some really nice problems on here (I have some favorites,
but to avoid spoilers for people using this as a practice test, I won’t say which ones yet).
You can check it out here:
I expect a number of students who plan to use this test as practice for the upcoming real AIME,
so I’ve set a “deadline” of January 15 and ask to avoid public discussion of spoilers before then.
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.
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:
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 by Harbin Institute of Technology). Both linked below:
Japanese translation at nippyo.co.jp and amazon.co.jp.
ISBN-10: 4535789789 / ISBN-13: 978-4535789784.
Chinese translation at abebooks
and amazon.
ISBN-10: 7560395880 / ISBN-13: 978-7560395883.
The list of errata is now version controlled on GitHub:
vEnhance/egmo-book-errata.
So now you can actually see a changelog of the ocean of typos as they come in.
Shout-out to the crew working on the Japanese translation of the book for
finding way more errors than I will ever care to admit (I didn’t count,
but it’s probably in the 200-300 ballpark).
I took a snapshot my database entries for sourced problems in EGMO.
It turns out that I have many written up already,
so we now have something of a solutions manual for about half the problems or so.
Since I like idiotic names, I dubbed it the Automatically Generated EGMO Solutions Treasury.
By popular request, Twitch Solves ISL is renewed for a second season which will begin on Friday,
18 November 2022.
As in the past, streams will start at 8:00pm Eastern time on Friday nights,
and last 1-4 hours depending on how much coffee I drank that morning.
I’ve scheduled 26 episodes for the second season to follow anime standards;
this will last up through the spring semester of MIT, around May 2023.
That said, my holiday plans are to-be-determined so things are likely to change
around a bit around the end of December or early January.
The stream scheduled for 13 January 2023 is also likely to be modified due to
the 2023 Mystery Hunt,
which I’m nominally on the organizing team for (though I’m only helping a little bit this year).
After two years, 480 hours, and 102 episodes of Twitch Solves ISL,
I’ve finally decided that it’s time for me to take a hiatus from my weekly Friday night streams.
So, episode 102 will be the end of Season 1.
To answer the obvious question: I’m definitely open to having a Season 2,
although it will probably have to wait until after the summer (as I will be away from my stream setup then),
and it probably won’t last 100 episodes.
Between now and then, I might also sporadically stream video game sessions if I’m in the mood for it,
so if you come by Friday night, you might get to watch me play through something from my Steam library.
I’d like to thank all my viewers and 1800 followers on Twitch, for being such a great audience all …
I worked with a few friends on writing a mini one-round puzzle hunt for this year’s MOP students.
If you want to play, you can do so now at the following URL:
I’m not sure whether or not this is going to become a recurring tradition.
On the one hand, it was loads of fun to make
(including figuring out how to draw art on my iPad);
on the other hand, I definitely didn’t blow a couple hundred hours
of my life putting this together. ;)
Unrelated advertisement: the Carina Initiatives
is currently looking to hire a junior data scientist.
They’re a young philanthropic fund that’s interested in supporting initiatives
that build actual math problem solving (like, the problem-solving you’d see on this blog,
not the mainstream buzzword stuff).
I’ve had a lot of fun talking with them over the …
A lot of people have been asking me how team selection is going to work for the USA this year.
This information was sent out to the contestants a while ago,
but I understand that there’s a lot of people outside of MOP 2020
who are interested in seeing the TST problems :)
so this is a quick overview of how things are going down this year.
This year there are six tests leading to the IMO 2021 team:
USA TSTST Day 1: November 12, 2020 (3 problems, 4.5 hours)
USA TSTST Day 2: December 10, 2020 (3 problems, 4.5 hours)
USA TSTST Day 3: January 21, 2021 (3 problems, 4.5 hours)
RMM Day 1: February 2021 (3 problems, 4.5 hours)
APMO: March 2021 (5 problems, 4 hours)
USAMO: April 2021 (2 days, each with 3 problems and 4.5 hours)
I’m happy to announce that sign-ups for my new olympiad style contest,
the United States Ersatz Math Olympiad (USEMO), are open now!
The webpage for the USEMO is https://web.evanchen.cc/usemo.html (where sign-ups are posted).
Logo for USEMO.
The US Ersatz Math Olympiad is a proof-based competition open to all US middle and high school students.
Like many competitions, its goals are to develop interest and ability in mathematics (rather than measure it).
However, it is one of few proof-based contests open to all US middle and high school students.
You can see more about the goals of this contest in the
mission statement.
The contest will run over Memorial day weekend:
Day 1 is Saturday May 23 2020, from 12:30pm ET – 5:00pm ET.
Day 2 is Sunday May 24 2020, from 12:30pm ET – 5:00pm ET.
OTIS Mock AIME 2024
