HackerTube / Video
The Fast Fourier Transform (FFT): Most Ingenious Algorithm Ever?
Reducible
Reducible's visual walkthrough of the Fast Fourier Transform, motivated by polynomial multiplication. It shows how the FFT's key ideas can be discovered by asking the right questions.
HN repeatedly calls it a fantastic explanation that made FFT click, with some rewatching it periodically.
9 Hacker News mentions · 2021–2026