But what is a partial differential equation? | DE2

The heat equation, as an introductory PDE.
Strogatz's new book: https://amzn.to/3bcnyw0
Special thanks to these supporters: http://3b1b.co/de2thanks
An equally valuable form of support is to simply share some of the videos.

Timestamps:
0:00 - Introduction
3:29 - Partial derivatives
6:52 - Building the heat equation
13:18 - ODEs vs PDEs
14:29 - The laplacian
16:04 - Book recommendation

Typo corrections:
1:33 - it should be “Black-Scholes”
16:21 - it should read "scratch an itch".
If anyone asks, I purposefully leave at least one typo in each video, like a Navajo rug with a deliberate imperfection as an artistic statement about the nature of life ;)

And to continue my unabashed Strogatz fanboyism, I should also mention that his textbook on nonlinear dynamics and chaos was also a meaningful motivator to do this series, as you'll hopefully see with the topics we build to.

Thanks to these viewers for their contributions to translations
Hebrew: Omer Tuchfeld

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Animations 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:
https://vincerubinetti.bandcamp.com/a...

Stream the music on Spotify:
https://open.spotify.com/album/1dVyjw...

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.
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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: http://3b1b.co/subscribe

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