Uploaded July 2019 | Updated September 2026, 2 weeks ago

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We still have some Curahedra on Maths Gear: mathsgear.co.uk/products/curvahedra

Here is the bonus chat over on my second channel.
youtu.be/9z-k2DJ9RbA

Read more about the scary version of the Gauss–Bonnet theorem
en.wikipedia.org/wiki/Gauss%E2%80%93Bonnet_theorem
mathworld.wolfram.com/Gauss-BonnetFormula.html

Edmund Harriss is on Twitter and Numberphile
twitter.com/gelada
youtube.com/watch?v=6aFcgATW9Mw

Check out the Symmetry groups wrapping paper he designed for Maths Gear
mathsgear.co.uk/products/symmetry-groups-wrapping-paper

More about Bathsheba Grossman and her sculptures which inspired Edmund
bathsheba.com

You can see my old curvahedra in the background of this video, as well as may others.
youtube.com/watch?v=4CbPksEl51Q


CORRECTIONS
- None yet, let me know if you spot anything!

Thanks as always to Jane Street being my channel's principal sponsor.
janestreet.com

Thanks to my Patreon supporters who help make these videos possible. Here is a random subset:

Alex Hackman
Susan Moury
Alex DeMartino
Malcolm Rowe
Ben White

Support my channel and I can make more maths videos:
patreon.com/standupmaths


Filming by Matt Parker
Editing by Alex Genn-Bash
Music by Howard Carter
Design by Simon Wright

MATT PARKER: Stand-up Mathematician
Website: standupmaths.com
Maths book: wwwh.umble-pi.com
Nerdy maths toys: mathsgear.co.uk