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2026

Variance at the Toporiginal ↗
19 Sept 2026
Staff and sponsors for OTIS XIIoriginal ↗
14 Sept 2026
September 2026 updatesoriginal ↗
5 Sept 2026
Don't be GPT-3original ↗
26 Jun 2026
After AMM 2026original ↗
13 Jun 2026
Cubics and theateroriginal ↗
16 May 2026
An example of a symmetric function with an asymmetric minimumoriginal ↗
6 May 2026
New blog refactored in Pelican!original ↗
4 May 2026
T.O.A. Asian Fusion opening in Merrickoriginal ↗
1 Apr 2026
American Masters in Mathematics 2026original ↗
4 Mar 2026

2025

Foresightoriginal ↗
11 Nov 2025
USEMO 2025 announcementoriginal ↗
25 Sept 2025
How to make the most out of MOPoriginal ↗
2 Sept 2025
Thoughts on teaching multivariable calculusoriginal ↗
8 Aug 2025
IMO 2024 and 2025original ↗
29 Jul 2025
2011 N1 = 2024 A2original ↗
16 Jul 2025
A stupid "real-life" application of quadratic reciprocityoriginal ↗
11 Jul 2025
OTIS XI Applications Outoriginal ↗
3 Jun 2025
Words Spentoriginal ↗
12 May 2025
Teammate Hunt 2025 Author Notesoriginal ↗
23 Apr 2025
Starting a career in fashion designoriginal ↗
1 Apr 2025
March 2025 newsflashoriginal ↗
14 Mar 2025
Getting to know problemsoriginal ↗
14 Feb 2025
A poset of math programsoriginal ↗
31 Jan 2025

2024

OTIS Mock AIME 2025 & USEMO 2024 resultsoriginal ↗
6 Dec 2024
FrontierMathoriginal ↗
10 Nov 2024
Hangul spellcheck for Vimoriginal ↗
31 Oct 2024
September newsflashoriginal ↗
5 Sept 2024
Imperative statements in geometry don't matteroriginal ↗
5 Aug 2024
A proof of Poncelet Porism with two circlesoriginal ↗
2 Jul 2024
The story of the AutoCarrotoriginal ↗
3 Jun 2024
OTIS X applications are openoriginal ↗
6 May 2024
The infinitely many stages of grieforiginal ↗
5 Apr 2024
(EC)⁵: College Essay Consultingoriginal ↗
1 Apr 2024
Brianchon is fair gameoriginal ↗
14 Mar 2024
NP-hard advice questionsoriginal ↗
4 Feb 2024
Against exploitable rubricsoriginal ↗
1 Feb 2024
January newsflashoriginal ↗
18 Jan 2024
MOHS was a mistakeoriginal ↗
5 Jan 2024

2023

OTIS Mock AIME 2024original ↗
22 Dec 2023
An advertisement for what puzzle hunts are about and why they're cooler than everyday puzzlesoriginal ↗
6 Nov 2023
Things I've learned from running OTISoriginal ↗
3 Nov 2023
A story of a townoriginal ↗
23 Oct 2023
Yet another reason I don't give much generic adviceoriginal ↗
3 Oct 2023
The depth of Hanabioriginal ↗
19 Sept 2023
Slice of life of the OTIS GMoriginal ↗
6 Sept 2023
Things to tell 18-year-old Evanoriginal ↗
30 Aug 2023
Twitch & USEMO Announcementoriginal ↗
26 Aug 2023
Agencyoriginal ↗
9 Aug 2023
What I would add to the K-12 listoriginal ↗
3 Jul 2023
Prideoriginal ↗
3 Jun 2023
New handout: Intro to Proofs for the Morbidly Curiousoriginal ↗
30 Apr 2023
Announcing ⛵IS, the successor to OTISoriginal ↗
1 Apr 2023
Everything I need is on the groundoriginal ↗
11 Mar 2023
Signal boost for Carina Initiatives full-time positionoriginal ↗
23 Feb 2023
But look at me noworiginal ↗
14 Feb 2023
Japanese EGMO is published!original ↗
9 Feb 2023
Mystery Hunt 2023original ↗
23 Jan 2023
A common type-error on the OTIS applicationoriginal ↗
17 Jan 2023
The silver liningoriginal ↗
2 Jan 2023

2022

Two updates on the EGMO textbookoriginal ↗
24 Nov 2022
Why Evan does not like JavaScript as a first languageoriginal ↗
18 Nov 2022
poemoriginal ↗
15 Nov 2022
Twitch Solves ISL, Season 2original ↗
4 Nov 2022
Ending Season 1 of Twitch Solves ISLoriginal ↗
12 Mar 2022

2021

Sometimes the best advice is no adviceoriginal ↗
21 Sept 2021
OTIS: The RPGoriginal ↗
24 Aug 2021
Book pitchoriginal ↗
16 Aug 2021
I reserved a Steam Deck!original ↗
10 Aug 2021
A short dissent on USA eligibilityoriginal ↗
15 Jul 2021
MOP 2021 puzzle huntoriginal ↗
25 Jun 2021
Unnecessarily detailed stories of my Mystery Hunt puzzlesoriginal ↗
21 Feb 2021
Some puzzle-writing thoughts from an amateuroriginal ↗
18 Feb 2021

2020

USEMO Problem Development, Behind the Scenesoriginal ↗
16 Dec 2020
USA Special Team Selection Test Series for IMO 2021original ↗
10 Nov 2020
On choosing exercisesoriginal ↗
14 Jun 2020
USEMO sign-ups are openoriginal ↗
21 Apr 2020
Circular optimizationoriginal ↗
15 Apr 2020
Meritocracy is the worst form of admissions except for all the other onesoriginal ↗
13 Jan 2020

2019

MOHS hardness scaleoriginal ↗
26 Nov 2019
Understanding with System 1original ↗
26 Oct 2019
MOP should do a better job of supporting its students in not-Juneoriginal ↗
25 Aug 2019
IMO 2019 Aftermathoriginal ↗
23 Jul 2019
An opening speech for MOPoriginal ↗
1 Jun 2019
Hard and soft techniquesoriginal ↗
3 May 2019
Undergraduate Math 011: a firsT yeaR coursE in geometrYoriginal ↗
1 Apr 2019
RMM 2019 pictures and aftermathoriginal ↗
26 Feb 2019
Napkin v1.5 (and more)original ↗
20 Feb 2019
Story: the morning after Valentine's Dayoriginal ↗
15 Feb 2019
Math contest platitudes, v3original ↗
31 Jan 2019

2018

Some things Evan is working on for 2019original ↗
25 Dec 2018
A few shockingly linear graphsoriginal ↗
10 Dec 2018
A trailer for p-adic analysis, second half: Mahler coefficientsoriginal ↗
25 Oct 2018
A trailer for p-adic analysis, first half: USA TST 2003original ↗
10 Oct 2018
New handout: Constructing Diagramsoriginal ↗
19 Sept 2018
Make training non zero-sumoriginal ↗
10 Aug 2018
I switched to point-based problem setsoriginal ↗
27 Mar 2018
Revisiting arc midpoints in complex numbersoriginal ↗
28 Feb 2018
An apology for HMMT 2016original ↗
2 Feb 2018
Lessons from math olympiadsoriginal ↗
5 Jan 2018
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