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"01a08748-74af-71f5-86c2-63a4a615fe27", "title": "Hard and soft techniques", "url": "https://blog.evanchen.cc/hard-and-soft/", "published_at": "2019-05-03T17:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a4a6eb372f", "title": "Undergraduate Math 011: a firsT yeaR coursE in geometrY", "url": "https://blog.evanchen.cc/tr011ey/", "published_at": "2019-04-01T17:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a4a74b1907", "title": "RMM 2019 pictures and aftermath", "url": "https://blog.evanchen.cc/rmm-2019/", "published_at": "2019-02-26T18:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a4a81de0cb", "title": "Napkin v1.5 (and more)", "url": "https://blog.evanchen.cc/feb-2019/", "published_at": "2019-02-20T18:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a4a89e76ee", "title": "Story: the morning after Valentine's Day", "url": "https://blog.evanchen.cc/valentine/", "published_at": "2019-02-15T18:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a4a8b9ea80", "title": "Math contest platitudes, v3", "url": "https://blog.evanchen.cc/platitudes/", "published_at": "2019-01-31T18:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a4a976f2aa", "title": "Some things Evan is working on for 2019", "url": "https://blog.evanchen.cc/dec-2018/", "published_at": "2018-12-25T21:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a4a9bed59d", "title": "A few shockingly linear graphs", "url": "https://blog.evanchen.cc/graphs/", "published_at": "2018-12-10T18:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a4aa53fe45", "title": "A trailer for p-adic analysis, second half: Mahler coefficients", "url": "https://blog.evanchen.cc/p-adic-2/", "published_at": "2018-10-25T17:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a4ab0aa69e", "title": "A trailer for p-adic analysis, first half: USA TST 2003", "url": "https://blog.evanchen.cc/p-adic-1/", "published_at": "2018-10-10T17:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a4ab28873b", "title": "New handout: Constructing Diagrams", "url": "https://blog.evanchen.cc/diagrams/", "published_at": "2018-09-19T17:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a4abed0431", "title": "Make training non zero-sum", "url": "https://blog.evanchen.cc/non-zero-sum/", "published_at": "2018-08-10T17:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a4ac47f27a", "title": "I switched to point-based problem sets", "url": "https://blog.evanchen.cc/points/", "published_at": "2018-03-27T17:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a4ad119a96", "title": "Revisiting arc midpoints in complex numbers", "url": "https://blog.evanchen.cc/arc-mid/", "published_at": "2018-02-28T18:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a4ade7d7d1", "title": "An apology for HMMT 2016", "url": "https://blog.evanchen.cc/apology/", "published_at": "2018-02-02T18:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a4ae0a1209", "title": "Lessons from math olympiads", "url": "https://blog.evanchen.cc/lessons/", "published_at": "2018-01-05T18:37:00+00:00" } ] posts Claim your blog

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2026

Variance at the Top original ↗

19 Sept 2026

Staff and sponsors for OTIS XII original ↗

14 Sept 2026

September 2026 updates original ↗

5 Sept 2026

Don't be GPT-3 original ↗

26 Jun 2026

After AMM 2026 original ↗

13 Jun 2026

Cubics and theater original ↗

16 May 2026

An example of a symmetric function with an asymmetric minimum original ↗

6 May 2026

New blog refactored in Pelican!original ↗

4 May 2026

T.O.A. Asian Fusion opening in Merrick original ↗

1 Apr 2026

American Masters in Mathematics 2026 original ↗

4 Mar 2026

2025

Foresight original ↗

11 Nov 2025

USEMO 2025 announcement original ↗

25 Sept 2025

How to make the most out of MOP original ↗

2 Sept 2025

Thoughts on teaching multivariable calculus original ↗

8 Aug 2025

IMO 2024 and 2025 original ↗

29 Jul 2025

2011 N1 = 2024 A2 original ↗

16 Jul 2025

A stupid "real-life" application of quadratic reciprocity original ↗

11 Jul 2025

OTIS XI Applications Out original ↗

3 Jun 2025

Words Spent original ↗

12 May 2025

Teammate Hunt 2025 Author Notes original ↗

23 Apr 2025

Starting a career in fashion design original ↗

1 Apr 2025

March 2025 newsflash original ↗

14 Mar 2025

Getting to know problems original ↗

14 Feb 2025

A poset of math programs original ↗

31 Jan 2025

2024

OTIS Mock AIME 2025 & USEMO 2024 results original ↗

6 Dec 2024

FrontierMath original ↗

10 Nov 2024

Hangul spellcheck for Vim original ↗

31 Oct 2024

September newsflash original ↗

5 Sept 2024

Imperative statements in geometry don't matter original ↗

5 Aug 2024

A proof of Poncelet Porism with two circles original ↗

2 Jul 2024

The story of the AutoCarrot original ↗

3 Jun 2024

OTIS X applications are open original ↗

6 May 2024

The infinitely many stages of grief original ↗

5 Apr 2024

(EC)⁵: College Essay Consulting original ↗

1 Apr 2024

Brianchon is fair game original ↗

14 Mar 2024

NP-hard advice questions original ↗

4 Feb 2024

Against exploitable rubrics original ↗

1 Feb 2024

January newsflash original ↗

18 Jan 2024

MOHS was a mistake original ↗

5 Jan 2024

2023

OTIS Mock AIME 2024 original ↗

22 Dec 2023

An advertisement for what puzzle hunts are about and why they're cooler than everyday puzzles original ↗

6 Nov 2023

Things I've learned from running OTIS original ↗

3 Nov 2023

A story of a town original ↗

23 Oct 2023

Yet another reason I don't give much generic advice original ↗

3 Oct 2023

The depth of Hanabi original ↗

19 Sept 2023

Slice of life of the OTIS GM original ↗

6 Sept 2023

Things to tell 18-year-old Evan original ↗

30 Aug 2023

Twitch & USEMO Announcement original ↗

26 Aug 2023

Agency original ↗

9 Aug 2023

What I would add to the K-12 list original ↗

3 Jul 2023

Pride original ↗

3 Jun 2023

New handout: Intro to Proofs for the Morbidly Curious original ↗

30 Apr 2023

Announcing ⛵IS, the successor to OTIS original ↗

1 Apr 2023

Everything I need is on the ground original ↗

11 Mar 2023

Signal boost for Carina Initiatives full-time position original ↗

23 Feb 2023

But look at me now original ↗

14 Feb 2023

Japanese EGMO is published!original ↗

9 Feb 2023

Mystery Hunt 2023 original ↗

23 Jan 2023

A common type-error on the OTIS application original ↗

17 Jan 2023

The silver lining original ↗

2 Jan 2023

2022

Two updates on the EGMO textbook original ↗

24 Nov 2022

Why Evan does not like JavaScript as a first language original ↗

18 Nov 2022

poem original ↗

15 Nov 2022

Twitch Solves ISL, Season 2 original ↗

4 Nov 2022

Ending Season 1 of Twitch Solves ISL original ↗

12 Mar 2022

2021

Sometimes the best advice is no advice original ↗

21 Sept 2021

OTIS: The RPG original ↗

24 Aug 2021

Book pitch original ↗

16 Aug 2021

I reserved a Steam Deck!original ↗

10 Aug 2021

A short dissent on USA eligibility original ↗

15 Jul 2021

MOP 2021 puzzle hunt original ↗

25 Jun 2021

Unnecessarily detailed stories of my Mystery Hunt puzzles original ↗

21 Feb 2021

Some puzzle-writing thoughts from an amateur original ↗

18 Feb 2021

2020

USEMO Problem Development, Behind the Scenes original ↗

16 Dec 2020

USA Special Team Selection Test Series for IMO 2021 original ↗

10 Nov 2020

On choosing exercises original ↗

14 Jun 2020

USEMO sign-ups are open original ↗

21 Apr 2020

Circular optimization original ↗

15 Apr 2020

Meritocracy is the worst form of admissions except for all the other ones original ↗

13 Jan 2020

2019

MOHS hardness scale original ↗

26 Nov 2019

Understanding with System 1 original ↗

26 Oct 2019

MOP should do a better job of supporting its students in not-June original ↗

25 Aug 2019

IMO 2019 Aftermath original ↗

23 Jul 2019

An opening speech for MOP original ↗

1 Jun 2019

Hard and soft techniques original ↗

3 May 2019

Undergraduate Math 011: a firsT yeaR coursE in geometrY original ↗

1 Apr 2019

RMM 2019 pictures and aftermath original ↗

26 Feb 2019

Napkin v1.5 (and more)original ↗

20 Feb 2019

Story: the morning after Valentine's Day original ↗

15 Feb 2019

Math contest platitudes, v3 original ↗

31 Jan 2019

2018

Some things Evan is working on for 2019 original ↗

25 Dec 2018

A few shockingly linear graphs original ↗

10 Dec 2018

A trailer for p-adic analysis, second half: Mahler coefficients original ↗

25 Oct 2018

A trailer for p-adic analysis, first half: USA TST 2003 original ↗

10 Oct 2018

New handout: Constructing Diagrams original ↗

19 Sept 2018

Make training non zero-sum original ↗

10 Aug 2018

I switched to point-based problem sets original ↗

27 Mar 2018

Revisiting arc midpoints in complex numbers original ↗

28 Feb 2018

An apology for HMMT 2016 original ↗

2 Feb 2018

Lessons from math olympiads original ↗

5 Jan 2018