Eric Novik came by my talk the other day and we were chatting about a number of things, including how much we forget as the years go by. I remarked that I used to be very comfortable with Fourier analysis and was able to use it as a research tool—see section 2.2 of my Ph.D. thesis, and it also came up in my research leading to R-hat (although it didn’t make it into the writeup)—but at this point I only understand Fourier analysis on a conceptual level. It’s not one of these things that stuck with me. In response, Eric pointed to this app that he created (with chatbot assistance) to help him my understand some things about Fourier series. Maybe it will be useful to some of you too. The source code is here.
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