2018-03-02

[public] 3.35M views, 126K likes, 1.47K dislikes audio only

3Blue1Brown

A most beautiful proof of the Basel problem, using light.

Help fund future projects: https://www.patreon.com/3blue1brown

An equally valuable form of support is to simply share some of the videos.

Special thanks to these supporters: http://3b1b.co/basel-thanks

This video was sponsored by Brilliant: https://brilliant.org/3b1b

Brilliant's principles list that I referenced:

https://brilliant.org/principles/

Get early access and more through Patreon:

https://www.patreon.com/3blue1brown

The content here was based on a paper by Johan Wästlund

http://www.math.chalmers.se/~wastlund/Cosmic.pdf

Check out Mathologer's video on the many cousins of the Pythagorean theorem:

/youtube/video/p-0SOWbzUYI

On the topic of Mathologer, he also has a nice video about the Basel problem:

/youtube/video/yPl64xi_ZZA

A simple Geogebra to play around with the Inverse Pythagorean Theorem argument shown here.

https://ggbm.at/yPExUf7b

Some of you may be concerned about the final step here where we said the circle approaches a line. What about all the lighthouses on the far end? Well, a more careful calculation will show that the contributions from those lights become more negligible. In fact, the contributions from almost all lights become negligible. For the ambitious among you, see this paper for full details.

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.

Music by Vincent Rubinetti:

https://vincerubinetti.bandcamp.com/album/the-music-of-3blue1brown

Thanks to these viewers for their contributions to translations

Hebrew: Omer Tuchfeld

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