Discuss on Reddit: http://redd.it/2fgu97 More links & stuff in full description below ↓↓↓ Featuring Dr Emily Riehl. Continues with the more mathematical bit at: https://www.youtube.com/watch?v=LtTV6rIxhdo The Gale/Shapley paper: http://bit.ly/StableMarriage Animation and artwork by Pete McPartlan. (But the bad bits of animation were by Brady) Support us on Patreon: http://www.patreon.com/numberphile 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 Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile Videos by Brady Haran 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 Numberphile T-Shirts: null Other merchandise: https://store.dftba.com/collections/numberphile