Portal:9 Fourier decomposition and hyperfunctions

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Art
@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 Jim Crutchfield did some similar work as a PhD student at UC Santa Cruz in the mid 80's with connections to dynamical systems theory. A behind the scenes of the basic mechanism of this kind of art can be seen here.
 * https://www.youtube.com/watch?v=viuKlztFcaI
 * https://www.youtube.com/watch?v=B4Kn3djJMCE
 * https://www.youtube.com/watch?v=OWnC9tSA3iA

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