Featuring Tom Crawford. Jane Street skyscraper puzzle (and info on the AMP program) at https://bit.ly/numberphile-amp --- More links & stuff in full description below ↓↓↓ Jane Street’s Academy of Math and Programming is now accepting applications for their summer 2024 program, which will run from June 29th-August 2nd in NYC... Or you can just check out the puzzle for fun too - https://bit.ly/numberphile-amp Tom Crawford's website, with links to his work and other outreach: https://tomrocksmaths.com/ More Tom videos on Numberphile: http://bit.ly/Crawford_Videos Tom on the Numberphile Podcast: https://www.youtube.com/watch?v=_HwKGncsGo0 Patreon: http://www.patreon.com/numberphile Numberphile is supported by Jane Street. Learn more about them (and exciting career opportunities) at: https://bit.ly/numberphile-janestreet We're also supported by the Simons Laufer Mathematical Sciences Institute (formerly MSRI): http://bit.ly/MSRINumberphile Our thanks also to the Simons Foundation: https://www.simonsfoundation.org/ NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile tweets: https://twitter.com/numberphile Subscribe: http://bit.ly/Numberphile_Sub Video by Brady Haran and Pete McPartlan Numberphile T-Shirts and Merch: null Brady's videos subreddit: http://www.reddit.com/r/BradyHaran/ Brady's latest videos across all channels: http://www.bradyharanblog.com/ Sign up for (occasional) emails: http://eepurl.com/YdjL9