Thanks to Jane Street for sponsoring this video! Head on over to 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: And if you missed the 2022 shows, we'll be doing more every year. 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: And here is his whole gosh darn channel: 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! 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: US book: UK book: 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