Po-Shen Loh is a mathematician at CMU and coach of the USA International Math Olympiad team. Please support this podcast by checking out our sponsors: - The Jordan Harbinger Show: https://jordanharbinger.com/lex/ - Onnit: https://lexfridman.com/onnit - BetterHelp: https://betterhelp.com/lex to get 10% off - Eight Sleep: https://www.eightsleep.com/lex and use code LEX to get special savings - LMNT: https://drinkLMNT.com/lex to get free sample pack EPISODE LINKS: Po's Twitter: https://twitter.com/poshenloh Po's Website: https://www.poshenloh.com/ Daily Challenges: https://daily.poshenloh.com/ NOVID: https://www.novid.org/ PODCAST INFO: Podcast website: https://lexfridman.com/podcast Apple Podcasts: https://apple.co/2lwqZIr Spotify: https://spoti.fi/2nEwCF8 RSS: https://lexfridman.com/feed/podcast/ Full episodes playlist: https://www.youtube.com/playlist?list=PLrAXtmErZgOdP_8GztsuKi9nrraNbKKp4 Clips playlist: https://www.youtube.com/playlist?list=PLrAXtmErZgOeciFP3CBCIEElOJeitOr41 OUTLINE: 0:00 - Introduction 1:43 - Planes and bridges 5:21 - Writing a computer game from scratch 7:46 - Programming competitions 11:21 - Math is hard 16:52 - Contact tracing that preserves privacy 54:09 - Math Olympiad 1:09:49 - Hard math problem 1:17:06 - Is math discovered or invented? 1:22:02 - Intelligence 1:28:52 - Math education 1:33:03 - How to learn math 1:41:58 - Combinatorics 1:45:05 - Voting trees 1:55:29 - Stochastic coalescence 2:05:15 - P=NP 2:09:32 - Tolkien and WWII 2:11:52 - Advice for young people 2:13:57 - Meaning of life SOCIAL: - Twitter: https://twitter.com/lexfridman - LinkedIn: https://www.linkedin.com/in/lexfridman - Facebook: https://www.facebook.com/lexfridman - Instagram: https://www.instagram.com/lexfridman - Medium: https://medium.com/@lexfridman - Reddit: https://reddit.com/r/lexfridman - Support on Patreon: https://www.patreon.com/lexfridman