Po-Shen Loh

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Po-Shen Loh
Po-Shen Loh.jpg
Po-Shen Loh
Born (1982-06-18) June 18, 1982 (age 37)
Alma materCalifornia Institute of Technology (BS)
Cambridge University (MASt)
Princeton University (PhD)
Scientific career
InstitutionsCarnegie Mellon University
Doctoral advisorBenny Sudakov

Po-Shen Loh (born June 18, 1982) is an associate professor of mathematics at Carnegie Mellon University[2] and currently the national coach of the United States' International Math Olympiad team.[3][4] Under his coaching, the team won the competition in 2015,[5] 2016, 2018,[6] and 2019[7]—their first victories since 1994.[8][9] He had previously won a silver medal for the US as a participant in 1999.[10] Loh runs a popular course to train students for the William Lowell Putnam Mathematical Competition known as Putnam Seminar[11] and is the founder of the educational website Expii.[8][12][13] In alternating semesters he teaches CMU's undergraduate course on discrete mathematics and the graduate seminar on extremal combinatorics.[14] He graduated from the California Institute of Technology with a 4.3 GPA. He was a Hertz Fellow at Princeton.


  1. ^ Sostek, Anya (May 13, 2019). "It took 36 years, but a girl has won the Pennsylvania middle school math championship". Pittsburgh Post-Gazette.
  2. ^ "Po-Shen Loh". Retrieved February 25, 2018.
  3. ^ "International Mathematical Olympiad". www.imo-official.org. Retrieved December 24, 2017.
  4. ^ Sostek, Anya (August 14, 2017). "More than 300,000 students entered a math contest. The top score came from a 16-year-old in Pittsburgh Public Schools". Pittsburgh Post-Gazette. Retrieved December 28, 2017.
  5. ^ "They're No. 1: U.S. Wins Math Olympiad For First Time In 21 Years". All Things Considered. National Public Radio. July 18, 2015. Retrieved December 28, 2017.
  6. ^ https://www.imo-official.org/year_country_r.aspx?year=2018
  7. ^ https://www.imo-official.org/year_country_r.aspx?year=2019
  8. ^ a b Strauss, Valerie (July 18, 2016). "U.S. students win prestigious International Math Olympiad — for second straight year". Washington Post. ISSN 0190-8286. Retrieved December 28, 2017.
  9. ^ "Count One More Gold For The U.S. — In Math". FiveThirtyEight. August 25, 2016. Retrieved December 28, 2017.
  10. ^ "International Mathematical Olympiad". www.imo-official.org. Retrieved March 25, 2018.
  11. ^ "Carnegie Mellon University Putnam Seminar". www.math.cmu.edu. Retrieved January 8, 2018.
  12. ^ Antonick, Gary (July 18, 2016). "U.S. Team Wins First Place at International Math Olympiad". Wordplay Blog. The New York Times. Retrieved December 28, 2017.
  13. ^ Tyre, Peg (March 2016). "The Math Revolution". The Atlantic. Retrieved December 28, 2017.
  14. ^ http://www.math.cmu.edu/~ploh/teaching.shtml

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