Today is not Pi-Day! This is blasphemy! Pi Day is obviously 22 July! 22/7 is a way better apriximation of pi than 3.14 is!

https://youtu.be/TLV6e41-uxc

#piday #numberphile

Feeling Grumpy about Pi Day - Numberphile

YouTube

Try it out! Change the checkboxes, drag the sliders. You can copy the link from "link here" to share your settings. https://ednl.github.io/spirojs/

#mathematics #numberphile #trigonometry #visualisation #animation #processing #p5jx #p5xjs

Spirograph with p5.js

There's a new #Numberphile video out with Ben Sparks. At the end they showed a teaser of another video with Ben, "Beautiful Trigonometry". Back when that came out, I recreated Ben's visualisation with settings and sliders in Processing's p5js. Try it! https://ednl.github.io/spirojs/

Video alt: a colourful circle composed of miniature circles (balls) seems to spin around inside a bigger circle. It's an illusion: all the individual balls move in perfectly straight lines on diagonals of the big circle.

@JonnElledge

[…Continued]

There are loads of resources on the WWW that do this far better justice, with more detail and less handwaving that I'm using here. There are also scads of pop science explanations by actual maths teachers. #Numberphile has #HannahFry discussing this with orange peel, for example. @standupmaths has probably covered it somewhere.

You'll know that you've reached the good stuff, the stuff that mathematicians and theoretical physicists deal in (knowing about intrinsic measure of curvature being necessary for a proper understanding of curved spacetime in General Relativity), when you come across the explanations that blithely throw in Christoffel symbols and Ricci tensors as if you know what the Hell they are on about. (-:

#maths #physics #Gauss #curvature

“A New Way to Look at Möbius Strips”

Nothing new in terms of results, even the ones that I knew as a kid, but a nice visualization that clarifies why things work out the way that they do.

https://www.youtube.com/watch?v=izIKV98Awnw

#Numberphile #geometry #math

A New Way to Look at Möbius Strips - Numberphile

YouTube
The 9-sided Enneahedron - Numberphile

YouTube
2016502858579884466176 - Numberphile

YouTube

#BigClive has taken a bit of a strange turn. The calculator is still pink, and the improvisation when a spudger is not to hand is still there.

But someone has turned on YouTube's new AI-powered convert-the-dialogue-to-an-Aussie-accent feature.

https://youtube.com/watch?v=rD6e925w4Ys

#MattParker #Numberphile

Return of the Calculator Unboxing - Numberphile

YouTube

Every, and I mean every, mathematician must know about this!!

The Forgotten Story of Indian Calculus by #numberphile

https://youtube.com/watch?v=G23Jx0kPCSI&si=HGSI6vU4zOZdU__6

The Forgotten Story of Indian Calculus - Numberphile

YouTube