Portal:9 Fourier decomposition and hyperfunctions

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 * The Road to Reality

Art

 * https://www.youtube.com/watch?v=viuKlztFcaI @TheExpertLayman points a video camera at a TV screen displaying the output of the video camera generating a visual feedback loop. By changing the lighting of the room among various other perturbations, and then filtering the results (a process which utilizes the Fourier transformation) he is able to generate videos such as this one