But what is a Fourier series? From heat flow to drawing with circles | DE4

Fourier series, from the heat equation epicycles. Help fund future projects: An equally valuable form of support is to simply share some of the videos. Special thanks to these supporters: 12 minutes of pure Fourier series animations: Some viewers made apps that create circle animations for your own drawing. Check them out! Thanks to Stuart@Biocinematics for the one-line sketch of Fourier via twitter. As it happens, he also has an educational YouTube channel: Small correction: at 9:33, all the exponents should have a pi^2 in them. If you’re looking for more Fourier Series content online, including code to play with to create this kind of animation yourself, check out