Uploaded September 2021 | Updated September 2026, 2 weeks ago

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STEVE MOULD FACE REVEAL! Check out Steve's 10^6 subscriber Q+A with me cosplaying as Steve. youtube.com/watch?v=GLADzZJqEyI

UPDATE: We have a proof that if a cable goes back and forth under a handle an equal number of times it can always be removed! Thanks to Henry Segerman. (It does assume the cord itself is not knotted.) dropbox.com/s/h8r1wk7qo1wwv71/Plug%20Handle%20Puzzle.pdf?dl=0

Huge thanks to Susan Okereke for helping out with the video. dothemathsthing.com

Check out her podcast with Bobby Seagull: Maths Appeal
youtube.com/channel/UCAScbgd_NlV99YSTK_pwfAQ
https://m.soundcloud.com/mathsappeal

This is the reddit post Steve mentioned. reddit.com/r/blackmagicfuckery/comments/kf65yo/dont_snip_use_sorcery

Whitehead link
mathworld.wolfram.com/WhiteheadLink.html

Cheers to my Patreon supporters. Without them I could not have afforded Steve's exorbitant YouTube consultancy rates. patreon.com/standupmaths

CORRECTIONS
- I never make mistakes.

Filming by Steve Mould, Alex Genn-Bash and Matt Parker
Editing by by Alex Genn-Bash
Music by Howard Carter
Design by Simon Wright and Adam Robinson

MATT PARKER: Stand-up Mathematician
Website: standupmaths.com
US book: penguinrandomhouse.com/books/610964/humble-pi-by-matt-parker
UK book: mathsgear.co.uk/collections/books/products/humble-pi-signed-paperback