Discrete convolutions, from probability to image processing and FFTs. Video on the continuous case: https://youtu.be/IaSGqQa5O-M Help fund future projects: https://www.patreon.com/3blue1brown Special thanks to these supporters: https://3b1b.co/lessons/convolutions#thanks An equally valuable form of support is to simply share the videos. Other videos I referenced Live lecture on image convolution
![But what is a convolution?](https://cdn-ak-scissors.b.st-hatena.com/image/square/cd008f3df372a31edf8a800e1b709b8f6f6cac9a/height=288;version=1;width=512/https%3A%2F%2Fi.ytimg.com%2Fvi%2FKuXjwB4LzSA%2Fhqdefault.jpg)