Associate Professor of Mathematics
Carnegie Mellon University,
Wean Hall 6208
National Coach,
USA International Math Olympiad team
USA back-to-back #1's breaking 21 year
gap;
Google News
Founder of expii.com
Non-routine math puzzles and personalized learning
Research interests:
Theory of combinatorics,
probability, algorithms; and real applications
Research / papers
Teaching /
CMU Putnam
21-228 Discrete Mathematics (Spring 2017)
CMU wins Putnam;
with
44 finishers in
top-500!
A few recorded math talks / 中文
United States
Math Olympiad Program
Computer
hacking
