If you're near Leeds, check out Maths City! https://mathscity.co.uk/ Against my better judgement, here is all the terrible python code I used to find the cosh curves. https://github.com/standupmaths/bubble-cosh The Goldschmid point is at 0.5276973967 The bubble bursts at 0.6627434193 The working out steps I skipped are on the MathWorld Minimal Surface of Revolution page. https://mathworld.wolfram.com/MinimalSurfaceofRevolution.html If you like some bikes with your gradients, check out Nico's 'Live To Ride' channel. null And as you may have noticed, the laser video with Seb is not out yet. I think it's going to trail this one by quite a while. Thanks to all of my Patreon supporters funded this video. Normally I would just visit a maths museum and have a fun day out. But thanks to you all, I was able to hire a camera person to follow me around. Plus I did a day of prep-work writing code before my visit and a day of generating plots after the visit. That's thanks to Patreon. (Who am I kidding; I would have done the coding and plots anyway.) https://www.patreon.com/standupmaths CORRECTIONS - None yet: let me know if you spot any mistakes! Filming and editing by Nico Turner State-of-the-art computer simulations by Matt Parker Music by Howard Carter 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