# Homepage of Evan Chen

This is the homepage of Evan Chen (陳誼廷), known also as vEnhance on many websites. I’m an MIT grad student under Wei Zhang, and also a math olympiad coach, volunteer, and YouTuber on the side.

My CV is here. Here is a list of my major coursework from undergraduate and graduate school. These days, I’m interested in number theory and combinatorics. My papers are linked on my publications page, and also on the arXiv.

I am on GitHub, Instagram, Twitch, and WordPress. You can also see my personal page for trivia about myself. Fellow Linux geeks can download my GPG key from keyserver.ubuntu.com or keys.opengpg.org.

If you are a high school student interested in math olympiads, you may visit the beginner’s page, my collection of handouts, or my archive of past problems and solutions.

The nine-point circle of $\triangle BIC$ is orthogonal to the circle with diameter $ST$.
Problem source: Taiwan TST Quiz 2015

Updated Thu 29 Dec 2022, 02:42:58 UTC by 70f7f3354d6b