Reverse Mathematics - Numberphile

This is extra footage to go with our video about Subcubic Graph Numbers at https://youtu.be/4-eXjTH6Mq4 Learn more about Jane Street internships at https://jane-st.co/internship-numberphile-25 More links & stuff in full description below ↓↓↓ Featuring Richard Elwes from the University of Leeds: https://eps.leeds.ac.uk/maths/staff/4018/dr-richard-elwes- Or: https://richardelwes.co.uk His books: https://amzn.to/4fJIhHE Patreon: http://www.patreon.com/numberphile Richard on Numberphile: https://youtube.com/playlist?list=PLt5AfwLFPxWI42WXh1jnv51jHrcjatrk8&si=gHHt4EVBv3zWQKMW Numberphile is supported by Jane Street. Learn more about them (and exciting career opportunities) at: https://www.janestreet.com We are also grateful for support from Ben Delo. NUMBERPHILE Website: http://www.numberphile.com/ Video by Brady Haran and Pete McPartlan Numberphile T-Shirts and Merch: https://teespring.com/stores/numberphile 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