New 7-direction pencil model discovered!

Опубликовано: 27 Февраль 2025
на канале: Stand-up Maths

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Find out more about Jane Street’s programmes running across the world:
https://bit.ly/sum-janestreet-programs

Including the WiSE course which is open to self-identifying women and gender-expansive university students and incoming students: https://www.janestreet.com/join-jane-...

Check out KangarooPhysics’ original gif showing the cross-section through the packing arrangment: https://x.com/kangaroophysics/status/...
And Daniel Piker’s amazing 3D model: https://sketchfab.com/3d-models/rod-p...
More detail on rod packing in this paper: https://journals.iucr.org/paper?S0108...

If you want to watch the extended cut, with every excruciating, pencil-pushing moment included, head over to this video on the second channel:    • EXTENDED CUT: Build your own 7-direct...

You can also watch the original "How to build a Hexastix in 72 easy steps" if you just want to build a Hexastix. In 72 easy steps.    • How to build a Hexastix in 72 easy steps

If you need 85 custom pencils in your life (The 67 you need, plus we've put in a few spares) you can buy a set over on Maths Gear. Elastic bands are not included.
https://mathsgear.co.uk/products/pris...

Huge thanks to my Patreon supporters. They are as special as a triangular pencil.   / standupmaths

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

Filming and editing by Alex Genn-Bash
Written and performed by Matt Parker
Produced by Nicole Jacobus
Music by Howard Carter
Design by Simon Wright and Adam Robinson

MATT PARKER: Stand-up Mathematician
Website: http://standupmaths.com/
Love Triangle: https://mathsgear.co.uk/products/love...
parker-signed
All UK options: https://www.penguin.co.uk/books/44315...
All USA options: https://bit.ly/3wCTesR