Shared December 8, 2017
A difficult geometry puzzle with an elegant solution.
Home page: https://www.3blue1brown.com/
Brought to you by you: http://3b1b.co/putnam-thanks
And by Brilliant: https://brilliant.org/3b1b
Solution to the puzzle mentioned at the end: https://brilliant.org/3b1bindicator/
These videos exist thanks to Patreon:
A different write-up of this solution:
1992 Putnam with this problem:
A problem with a similar flavor came up on the 2005 Putnam A6. Give it a try! The solution for that problem, by the way, was written by Calvin Lin, a friend of mine who works at Brilliant. Small world!
Animations largely made using manim, a scrappy open source python library. https://github.com/3b1b/manim
If you want to check it out, I feel compelled to warn you that it's not the most well-documented tool, and has many other quirks you might expect in a library someone wrote with only their own use in mind.
Music by Vincent Rubinetti.
Download the music on Bandcamp:
Stream the music on Spotify:
If you want to contribute translated subtitles or to help review those that have already been made by others and need approval, you can click the gear icon in the video and go to subtitles/cc, then "add subtitles/cc". I really appreciate those who do this, as it helps make the lessons accessible to more people.
3blue1brown is a channel about animating math, in all senses of the word animate. And you know the drill with YouTube, if you want to stay posted on new videos, subscribe, and click the bell to receive notifications (if you're into that).
If you are new to this channel and want to see more, a good place to start is this playlist: http://3b1b.co/recommended
Various social media stuffs:
The Legend of Question Six - Numberphile
Hilbert's Curve: Is infinite math useful?
[FULL VERSION] Magnus Carlsen Blind & Timed Chess Simul at the Sohn Conference in NYC
How Hot Can It Get?
The Ingenious Design of the Aluminum Beverage Can
The Infinite Hotel Paradox - Jeff Dekofsky
Who cares about topology? (Inscribed rectangle problem)
The Moving Sofa Problem - Numberphile
Pi hiding in prime regularities
Should a Person Touch 200,000 Volts? A Van de Graaff generator experiment!
Mozart of Chess: Magnus Carlsen
The Unreasonable Efficiency of Black Holes
Quantum Gravity and the Hardest Problem in Physics | Space Time
The Essence of Calculus, Chapter 1
The Banach–Tarski Paradox
What does it feel like to invent math?
Is it possible? Simple questions, not so simple solutions
All possible pythagorean triples, visualized
The problem in Good Will Hunting - Numberphile