Associate Professor of Mathematics
Carnegie Mellon University,
Wean
6208
National Coach,
USA International Math Olympiad team
USA back-to-back #1's breaking 21 year
gap;
Google News
Founder of Expii
Personalized learning,
videos bringing math to life,
and
creative
math puzzles
Research interests:
Combinatorics,
probability, algorithms; real applications
Research / papers
Teaching /
CMU Putnam
Putnam Problem Solving Seminar (Fall 2018)
YouTube math channel / 中文
United States
Math Olympiad Program
Computer
hacking