Uploaded July 2019 | Updated September 2026, 2 weeks ago

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More details about Jane Street's WiSE and WiTT events: janestreet.com/join-jane-street/programs-and-events

Here is the reddit post I first saw:

"I designed an Intertwined Mobius strip of Gears. 60parts, 285 balls"
reddit.com/r/3Dprinting/comments/blmqbd/i_designed_an_intertwined_mobius_strip_of_gears

Just the gif:
https://i.redd.it/wi38hd95ebb11.gif

Thanks to ElminsCosplay for making the cogs for me! Check out their other stuff.
facebook.com/ElminsCosplay

If you really want to, you can buy my book:
mathsgear.co.uk/products/humble-pi-a-comedy-of-maths-errors

These are the lectures I mention:

What Happens When Maths Goes Wrong? - with Matt Parker
youtu.be/6JwEYamjXpA?t=290

Matt Parker: "The Greatest Maths Mistakes" | Talks at Google
youtu.be/34detVy-Hiw?t=391


This is my previous video with Sabetta:

Exploring Hyperbolic Space with VR (and crochet)
youtube.com/watch?v=MTfviv_aZYI

And check out Henry's crazy gears:

Three Gears are Possible - Numberphile
youtube.com/watch?v=5Mf0JpTI_gg


CORRECTIONS
- When I read the poster I say that education works best when all the parts are “moving” instead of “working”. The first person to complain about this was Steven Brace.
- Let me know if you spot anything else!

Thanks as always for Jane Street being my principal sponsor.
janestreet.com

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

Andy
Fernando Gaete Ferrari
Daniel Brockwell
Matt Langford
Markus Herrmann
Erin Eldridge

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

Music by Howard Carter
Filming and editing by Matt Parker
Design by Simon Wright

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