Professor of Mathematics
Carnegie Mellon
University, Wean
6208
Founder of LIVE, NOVID, and Expii
Live video math classes
,
videos bringing math to life,
making it possible to moderate Zoom Chat
, and
personalized learning.
National
coach of USA Math Olympiad Team from 2014–2023
Research interests:
Combinatorics,
probability, algorithms; real applications
Main webpage for general public
Research / papers
Teaching /
CMU Putnam
21-295 Putnam Seminar (Fall 2025)
YouTube math channel / 中文
Speaking tour
United States
Math Olympiad Program
Computer
hacking