Thanks to Jane Street for sponsoring this video! Head on over to https://www.janestreet.com/join-jane-street/our-programs/ to see their programs. Here is Maths Fest! Live from the Royal Institution on Wednesday 9 February 2022, you can watch it anywhere in the world for up to a month after. Details: https://maths-fest.com/livestream/ And if you missed the 2022 shows, we'll be doing more every year. http://maths-fest.com/ Check out Danny Gonzalez's video "The Problem With Huge Giveaways On YouTube" where de does actually 'give away a Tesla'. The mathy bit with the whiteboard starts at 16:56: https://www.youtube.com/watch?v=w_6HHWCdl7w And here is his whole gosh darn channel: null Cheers to my Patreon supporters who, and this is completely true, 0.3% of which are named "Greg". But whatever your name, you can also help support and shape the videos I make! https://www.patreon.com/standupmaths CORRECTIONS - When I give the convergence range 0 - r - 1 at 17:53 it actually could be -1 - r - 1. Spotted by Dennis R. - Let me know if you spot any more mistakes. Editing under duress by Alex Genn-Bash Maths by Matt Parker Music by Howard Carter "Music" by Howard Carter and Matt Parker Design by Simon Wright and Adam Robinson MATT PARKER: Stand-up Mathematician Website: http://standupmaths.com/ US book: https://www.penguinrandomhouse.com/books/610964/humble-pi-by-matt-parker/ UK book: https://mathsgear.co.uk/collections/books/products/humble-pi-signed-paperback WHY DO I CALL MY FANS MATH? Danny calls his "Greg" and I thought it would be funny. And all you have to do to join is hit subscribe and turn on notifications. #mattparker #dannygonzalez