41554 blogs · [ { "id": "01a0d593-ffb3-7015-b09f-1ee93751eb38", "title": "Variance at the Top", "url": "https://blog.evanchen.cc/variance/", "published_at": "2026-09-19T17:37:00+00:00" }, { "id": "01a0d593-ffb3-7015-b09f-1ee93753b304", "title": "Staff and sponsors for OTIS XII", "url": "https://blog.evanchen.cc/otis-xii/", "published_at": "2026-09-14T17:37:00+00:00" }, { "id": "01a08748-74ac-727a-ade5-092349511ce3", "title": "September 2026 updates", "url": "https://blog.evanchen.cc/sep-2026/", "published_at": "2026-09-05T17:37:00+00:00" }, { "id": "01a08748-74ac-727a-ade5-092349bf379c", "title": "Don't be GPT-3", "url": "https://blog.evanchen.cc/gpt3/", "published_at": "2026-06-26T17:37:00+00:00" }, { "id": "01a08748-74ac-727a-ade5-09234a678b58", "title": "After AMM 2026", "url": "https://blog.evanchen.cc/after-amm-2026/", "published_at": "2026-06-13T17:37:00+00:00" }, { "id": "01a08748-74ac-727a-ade5-09234add7b94", "title": "Cubics and theater", "url": "https://blog.evanchen.cc/cubics/", "published_at": "2026-05-16T17:37:00+00:00" }, { "id": "01a08748-74ac-727a-ade5-09234bbd928e", "title": "An example of a symmetric function with an asymmetric minimum", "url": "https://blog.evanchen.cc/notsymm/", "published_at": "2026-05-06T17:37:00+00:00" }, { "id": "01a08748-74ac-727a-ade5-09234c221ad5", "title": "New blog refactored in Pelican!", "url": "https://blog.evanchen.cc/pelican/", "published_at": "2026-05-04T17:37:00+00:00" }, { "id": "01a08748-74ac-727a-ade5-09234c6f0284", "title": "T.O.A. Asian Fusion opening in Merrick", "url": "https://blog.evanchen.cc/toa/", "published_at": "2026-04-01T04:00:00+00:00" }, { "id": "01a08748-74ac-727a-ade5-09234cec9313", "title": "American Masters in Mathematics 2026", "url": "https://blog.evanchen.cc/amm-2026/", "published_at": "2026-03-04T18:37:00+00:00" }, { "id": "01a08748-74ac-727a-ade5-09234d31d684", "title": "Foresight", "url": "https://blog.evanchen.cc/foresight/", "published_at": "2025-11-11T18:37:00+00:00" }, { "id": "01a08748-74ac-727a-ade5-09234dbbcdf0", "title": "USEMO 2025 announcement", "url": "https://blog.evanchen.cc/usemo-2025/", "published_at": "2025-09-25T17:37:00+00:00" }, { "id": "01a08748-74ac-727a-ade5-09234dec93ff", "title": "How to make the most out of MOP", "url": "https://blog.evanchen.cc/most/", "published_at": "2025-09-02T17:37:00+00:00" }, { "id": "01a08748-74ac-727a-ade5-09234e0c6665", "title": "Thoughts on teaching multivariable calculus", "url": "https://blog.evanchen.cc/mulitvar/", "published_at": "2025-08-08T23:23:00+00:00" }, { "id": "01a08748-74ac-727a-ade5-09234ef9fc72", "title": "IMO 2024 and 2025", "url": "https://blog.evanchen.cc/coord/", "published_at": "2025-07-29T17:37:00+00:00" }, { "id": "01a08748-74ac-727a-ade5-09234f663e8b", "title": "2011 N1 = 2024 A2", "url": "https://blog.evanchen.cc/write-well/", "published_at": "2025-07-16T17:37:00+00:00" }, { "id": "01a08748-74ac-727a-ade5-092350097500", "title": "A stupid \"real-life\" application of quadratic reciprocity", "url": "https://blog.evanchen.cc/qr/", "published_at": "2025-07-11T17:37:00+00:00" }, { "id": "01a08748-74ac-727a-ade5-0923502a31a0", "title": "OTIS XI Applications Out", "url": "https://blog.evanchen.cc/otis-xi/", "published_at": "2025-06-03T17:37:00+00:00" }, { "id": "01a08748-74ac-727a-ade5-092350cb9b00", "title": "Words Spent", "url": "https://blog.evanchen.cc/words-spent/", "published_at": "2025-05-12T17:37:00+00:00" }, { "id": "01a08748-74ac-727a-ade5-092351c3e4d8", "title": "Teammate Hunt 2025 Author Notes", "url": "https://blog.evanchen.cc/tmh-2025/", "published_at": "2025-04-23T17:37:00+00:00" }, { "id": "01a08748-74ac-727a-ade5-092352ac93f1", "title": "Starting a career in fashion design", "url": "https://blog.evanchen.cc/fashion/", "published_at": "2025-04-01T04:00:00+00:00" }, { "id": "01a08748-74ac-727a-ade5-09235339eb0d", "title": "March 2025 newsflash", "url": "https://blog.evanchen.cc/mar-2025/", "published_at": "2025-03-14T17:37:00+00:00" }, { "id": "01a08748-74ac-727a-ade5-0923538e1295", "title": "Getting to know problems", "url": "https://blog.evanchen.cc/getting-to-know/", "published_at": "2025-02-14T18:37:00+00:00" }, { "id": "01a08748-74ac-727a-ade5-092353bcd93d", "title": "A poset of math programs", "url": "https://blog.evanchen.cc/poset/", "published_at": "2025-01-31T18:37:00+00:00" }, { "id": "01a08748-74ac-727a-ade5-092353c71d46", "title": "OTIS Mock AIME 2025 & USEMO 2024 results", "url": "https://blog.evanchen.cc/dec-2024/", "published_at": "2024-12-06T18:37:00+00:00" }, { "id": "01a08748-74ac-727a-ade5-0923540efeb2", "title": "FrontierMath", "url": "https://blog.evanchen.cc/frontiermath/", "published_at": "2024-11-10T18:37:00+00:00" }, { "id": "01a08748-74ac-727a-ade5-092354d2e7b4", "title": "Hangul spellcheck for Vim", "url": "https://blog.evanchen.cc/hangul-spellcheck/", "published_at": "2024-10-31T17:37:00+00:00" }, { "id": "01a08748-74ad-715c-b688-55c558560bd7", "title": "September newsflash", "url": "https://blog.evanchen.cc/sep-2024/", "published_at": "2024-09-05T17:37:00+00:00" }, { "id": "01a08748-74ad-715c-b688-55c55905ab91", "title": "Imperative statements in geometry don't matter", "url": "https://blog.evanchen.cc/imperative/", "published_at": "2024-08-05T17:37:00+00:00" }, { "id": "01a08748-74ad-715c-b688-55c559df70b0", "title": "A proof of Poncelet Porism with two circles", "url": "https://blog.evanchen.cc/poncelet/", "published_at": "2024-07-02T15:51:00+00:00" }, { "id": "01a08748-74ad-715c-b688-55c55a29de07", "title": "The story of the AutoCarrot", "url": "https://blog.evanchen.cc/auto-carrot/", "published_at": "2024-06-03T17:37:00+00:00" }, { "id": "01a08748-74ad-715c-b688-55c55ab2ca39", "title": "OTIS X applications are open", "url": "https://blog.evanchen.cc/otis-x/", "published_at": "2024-05-06T17:37:00+00:00" }, { "id": "01a08748-74ad-715c-b688-55c55ae54eb6", "title": "The infinitely many stages of grief", "url": "https://blog.evanchen.cc/grief/", "published_at": "2024-04-05T17:37:00+00:00" }, { "id": "01a08748-74ad-715c-b688-55c55b0c0e2b", "title": "(EC)⁵: College Essay Consulting", "url": "https://blog.evanchen.cc/ec5/", "published_at": "2024-04-01T04:01:00+00:00" }, { "id": "01a08748-74ad-715c-b688-55c55b9d4444", "title": "Brianchon is fair game", "url": "https://blog.evanchen.cc/brianchon/", "published_at": "2024-03-14T17:37:00+00:00" }, { "id": "01a08748-74ad-715c-b688-55c55c5ed4a1", "title": "NP-hard advice questions", "url": "https://blog.evanchen.cc/np-hard-advice/", "published_at": "2024-02-04T18:37:00+00:00" }, { "id": "01a08748-74ad-715c-b688-55c55cc0e158", "title": "Against exploitable rubrics", "url": "https://blog.evanchen.cc/rubrics/", "published_at": "2024-02-01T18:37:00+00:00" }, { "id": "01a08748-74ad-715c-b688-55c55d567c89", "title": "January newsflash", "url": "https://blog.evanchen.cc/jan-2024/", "published_at": "2024-01-18T20:29:00+00:00" }, { "id": "01a08748-74ad-715c-b688-55c55d761e40", "title": "MOHS was a mistake", "url": "https://blog.evanchen.cc/mohs/", "published_at": "2024-01-05T18:37:00+00:00" }, { "id": "01a08748-74ae-736e-82c7-93c637729f69", "title": "OTIS Mock AIME 2024", "url": "https://blog.evanchen.cc/oime-2024/", "published_at": "2023-12-22T20:00:00+00:00" }, { "id": "01a08748-74ae-736e-82c7-93c637fbb3fe", "title": "An advertisement for what puzzle hunts are about and why they're cooler than everyday puzzles", "url": "https://blog.evanchen.cc/puzzles/", "published_at": "2023-11-06T18:37:00+00:00" }, { "id": "01a08748-74ae-736e-82c7-93c638bf8d35", "title": "Things I've learned from running OTIS", "url": "https://blog.evanchen.cc/otis/", "published_at": "2023-11-03T17:37:00+00:00" }, { "id": "01a08748-74ae-736e-82c7-93c6399450db", "title": "A story of a town", "url": "https://blog.evanchen.cc/town/", "published_at": "2023-10-23T17:37:00+00:00" }, { "id": "01a08748-74ae-736e-82c7-93c63a25c5d6", "title": "Yet another reason I don't give much generic advice", "url": "https://blog.evanchen.cc/generic/", "published_at": "2023-10-03T17:37:00+00:00" }, { "id": "01a08748-74ae-736e-82c7-93c63a5ef5b5", "title": "The depth of Hanabi", "url": "https://blog.evanchen.cc/hanabi/", "published_at": "2023-09-19T17:37:00+00:00" }, { "id": "01a08748-74ae-736e-82c7-93c63b210a3a", "title": "Slice of life of the OTIS GM", "url": "https://blog.evanchen.cc/slice/", "published_at": "2023-09-06T17:37:00+00:00" }, { "id": "01a08748-74ae-736e-82c7-93c63b395c10", "title": "Things to tell 18-year-old Evan", "url": "https://blog.evanchen.cc/18yo/", "published_at": "2023-08-30T17:37:00+00:00" }, { "id": "01a08748-74ae-736e-82c7-93c63bcbbc24", "title": "Twitch & USEMO Announcement", "url": "https://blog.evanchen.cc/twitch-s3/", "published_at": "2023-08-26T17:37:00+00:00" }, { "id": "01a08748-74ae-736e-82c7-93c63c6827d3", "title": "Agency", "url": "https://blog.evanchen.cc/agency/", "published_at": "2023-08-09T17:37:00+00:00" }, { "id": "01a08748-74ae-736e-82c7-93c63cba94ee", "title": "What I would add to the K-12 list", "url": "https://blog.evanchen.cc/k12/", "published_at": "2023-07-03T17:37:00+00:00" }, { "id": "01a08748-74ae-736e-82c7-93c63dacaf20", "title": "Pride", "url": "https://blog.evanchen.cc/pride/", "published_at": "2023-06-03T17:37:00+00:00" }, { "id": "01a08748-74ae-736e-82c7-93c63e848c5c", "title": "New handout: Intro to Proofs for the Morbidly Curious", "url": "https://blog.evanchen.cc/morbid/", "published_at": "2023-04-30T17:37:00+00:00" }, { "id": "01a08748-74ae-736e-82c7-93c63ede1d51", "title": "Announcing ⛵IS, the successor to OTIS", "url": "https://blog.evanchen.cc/boatis/", "published_at": "2023-04-01T04:00:00+00:00" }, { "id": "01a08748-74ae-736e-82c7-93c63f743129", "title": "Everything I need is on the ground", "url": "https://blog.evanchen.cc/ground/", "published_at": "2023-03-11T18:37:00+00:00" }, { "id": "01a08748-74ae-736e-82c7-93c63f75ffed", "title": "Signal boost for Carina Initiatives full-time position", "url": "https://blog.evanchen.cc/carina-2023/", "published_at": "2023-02-23T20:40:00+00:00" }, { "id": "01a08748-74ae-736e-82c7-93c63fbddde1", "title": "But look at me now", "url": "https://blog.evanchen.cc/oliveira/", "published_at": "2023-02-14T18:37:00+00:00" }, { "id": "01a08748-74ae-736e-82c7-93c6402ad4a2", "title": "Japanese EGMO is published!", "url": "https://blog.evanchen.cc/japanese-egmo/", "published_at": "2023-02-09T18:37:00+00:00" }, { "id": "01a08748-74ae-736e-82c7-93c641136e19", "title": "Mystery Hunt 2023", "url": "https://blog.evanchen.cc/mh-2023/", "published_at": "2023-01-23T18:37:00+00:00" }, { "id": "01a08748-74ae-736e-82c7-93c6417b3e34", "title": "A common type-error on the OTIS application", "url": "https://blog.evanchen.cc/type/", "published_at": "2023-01-17T18:37:00+00:00" }, { "id": "01a08748-74ae-736e-82c7-93c641e6c6bb", "title": "The silver lining", "url": "https://blog.evanchen.cc/silver/", "published_at": "2023-01-02T18:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a49b2d3a91", "title": "Two updates on the EGMO textbook", "url": "https://blog.evanchen.cc/egmo-book/", "published_at": "2022-11-24T18:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a49bd17e69", "title": "Why Evan does not like JavaScript as a first language", "url": "https://blog.evanchen.cc/javascript/", "published_at": "2022-11-18T18:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a49c1bc606", "title": "poem", "url": "https://blog.evanchen.cc/poem/", "published_at": "2022-11-15T18:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a49c64a38a", "title": "Twitch Solves ISL, Season 2", "url": "https://blog.evanchen.cc/twitch-s2/", "published_at": "2022-11-04T15:57:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a49cd6d04f", "title": "Ending Season 1 of Twitch Solves ISL", "url": "https://blog.evanchen.cc/twitch-s1/", "published_at": "2022-03-12T03:11:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a49d025eac", "title": "Sometimes the best advice is no advice", "url": "https://blog.evanchen.cc/no-advice/", "published_at": "2021-09-21T17:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a49ddc288b", "title": "OTIS: The RPG", "url": "https://blog.evanchen.cc/rpg/", "published_at": "2021-08-24T17:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a49e92a8f5", "title": "Book pitch", "url": "https://blog.evanchen.cc/book-pitch/", "published_at": "2021-08-16T17:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a49ec8bd4a", "title": "I reserved a Steam Deck!", "url": "https://blog.evanchen.cc/steam-deck/", "published_at": "2021-08-10T17:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a49f117c05", "title": "A short dissent on USA eligibility", "url": "https://blog.evanchen.cc/dissent/", "published_at": "2021-07-15T17:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a49fcf0cb0", "title": "MOP 2021 puzzle hunt", "url": "https://blog.evanchen.cc/mosp-2021/", "published_at": "2021-06-25T23:55:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a4a05f1b52", "title": "Unnecessarily detailed stories of my Mystery Hunt puzzles", "url": "https://blog.evanchen.cc/mh-2021/", "published_at": "2021-02-21T18:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a4a0a863d2", "title": "Some puzzle-writing thoughts from an amateur", "url": "https://blog.evanchen.cc/puzzle-writing/", "published_at": "2021-02-18T06:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a4a19ebe7c", "title": "USEMO Problem Development, Behind the Scenes", "url": "https://blog.evanchen.cc/usemo-dev/", "published_at": "2020-12-16T18:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a4a26b71a1", "title": "USA Special Team Selection Test Series for IMO 2021", "url": "https://blog.evanchen.cc/tst-2021/", "published_at": "2020-11-10T18:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a4a2b249ba", "title": "On choosing exercises", "url": "https://blog.evanchen.cc/exercises/", "published_at": "2020-06-14T17:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a4a2c8e1ae", "title": "USEMO sign-ups are open", "url": "https://blog.evanchen.cc/usemo-2020/", "published_at": "2020-04-21T17:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a4a3398a01", "title": "Circular optimization", "url": "https://blog.evanchen.cc/circular/", "published_at": "2020-04-15T21:22:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a4a35c2855", "title": "Meritocracy is the worst form of admissions except for all the other ones", "url": "https://blog.evanchen.cc/meritocracy/", "published_at": "2020-01-13T18:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a4a3b41249", "title": "MOHS hardness scale", "url": "https://blog.evanchen.cc/mohs-scale/", "published_at": "2019-11-26T18:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a4a400b35c", "title": "Understanding with System 1", "url": "https://blog.evanchen.cc/sys1/", "published_at": "2019-10-26T17:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a4a4f54ecb", "title": "MOP should do a better job of supporting its students in not-June", "url": "https://blog.evanchen.cc/support/", "published_at": "2019-08-25T17:37:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a4a592601c", "title": "IMO 2019 Aftermath", "url": "https://blog.evanchen.cc/imo-2019/", "published_at": "2019-07-23T19:08:00+00:00" }, { "id": "01a08748-74af-71f5-86c2-63a4a5cce190", "title": "An opening speech for MOP", "url": "https://blog.evanchen.cc/mop-speech/", "published_at": "2019-06-01T17:37:00+00:00" }, { "id": "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
Back to blog.evanchen.cc
Blog · corpus.blog/blogs/blog.evanchen.cc/posts

blog.evanchen.cc

blog.evanchen.cc

2026

2025

2024

2023

2022

15 Nov 2022

2021

2020

2019

2018