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But what is a Fourier series? From heat flow to drawing with circles | DE4
3Blue1Brown
3Blue1Brown introduces Fourier series, from the heat equation to drawing arbitrary shapes with rotating circles. It builds a visual intuition for decomposing functions into sine waves.
Recommended as the visual explanation that makes Fourier series and transforms click, even for laypeople.
8 Hacker News mentions · 2020–2025