All Posts

Sometimes the best advice is no advice


OTIS: The RPG


Book pitch


I reserved a Steam Deck!


A short dissent on USA eligibility


MOP 2021 puzzle hunt


Unnecessarily detailed stories of my Mystery Hunt puzzles


Some puzzle-writing thoughts from an amateur


USEMO Problem Development, Behind the Scenes


USA Special Team Selection Test Series for IMO 2021


On choosing exercises


USEMO sign-ups are open


Circular optimization


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


MOHS hardness scale


Understanding with System 1


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


IMO 2019 Aftermath


An opening speech for MOP


Hard and soft techniques


Undergraduate Math 011: a firsT yeaR coursE in geometrY


RMM 2019 pictures and aftermath


Napkin v1.5 (and more)


Story: the morning after Valentine’s Day


Math contest platitudes, v3


Some things Evan is working on for 2019


A few shockingly linear graphs


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


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


New oly handout: Constructing Diagrams


Make training non zero-sum


I switched to point-based problem sets


Revisiting arc midpoints in complex numbers


An apology for HMMT 2016


Lessons from math olympiads


A story of block-ascending permutations


117(d): Please don’t tax PhD tuition waivers


Joyal’s Proof of Cayley’s Tree Formula


Positive Definite Quadratic Forms


Some Thoughts on Olympiad Material Design


On Reading Solutions


Holomorphic Logarithms and Roots


Facts about Lie Groups and Algebras


Combinatorial Nullstellensatz and List Coloring


SysRq on Arch Linux Mac Mini


Algebraic Topology Functors


Notes on Publishing My Textbook


DNSCrypt Setup with PDNSD


A Sketchy Overview of Green-Tao


Formal vs Functional Series (OR: Generating Function Voodoo Magic)


New algebra handouts on my website


Approximating E3-LIN is NP-Hard


Against the “Research vs. Olympiads” Mantra


Vinogradov’s Three-Prime Theorem (with Sammy Luo and Ryan Alweiss)


First drafts of Napkin up!


The Structure Theorem over PID’s


Miller-Rabin (for MIT 18.434)


Things Fourier


___ Students Have to Suffer


Artin Reciprocity


Against Perfect Scores


18.099 Transcript: Bourgain’s Theorem


Shifting PDF’s using gs


18.099 Transcript: Chang’s Theorem


Mechanism Design and Revenue Equivalence


Tannakian Reconstruction


Things SPARC


Stop Paying Me Per Hour


Some Advice for Olympiad Geometry


Rant: Matrices Are Not Arrays of Numbers


Writing Olympiad Geometry Problems


Uniqueness of Solutions for DiffEq’s


Putnam 2015 Aftermath


Models of ZFC


Cardinals


Git Aliases


Constructing the Tangent and Cotangent Space


Some Notes on Valuations


The Mixtilinear Incircle


Conversations


Linnik’s Theorem for Sato-Tate Laws on CM Elliptic Curves


Transferring


Proof of Dirichlet’s Theorem on Arithmetic Progressions


Zeros and Primes


von Mangoldt and Zeta


On Problem Sets


Cauchy’s Functional Equation and Zorn’s Lemma


Writing


Teaching A* USAMO Camp


Representation Theory, Part 4: The Finite Regular Representation


Represenation Theory, Part 3: Products of Representations


Representation Theory, Part 2: Schur’s Lemma


Representation Theory, Part 1: Irreducibles and Maschke’s Theorem


Three Properties of Isogonal Conjugates


Set Theory, Part 2: Constructing the Ordinals


Set Theory, Part 1: An Intro to ZFC


Why do roots come in conjugate pairs?


Arch Linux on a Mac Mini


What leads to success at math contests?


Writing Olympiad Geometry


A Sampler of Harvard Math


PDF Compression


Constructing Parallelograms


Email, JetPack, and Wintermelon