Talk:Discrete Fourier transform

Link to subsection in Representation theory of finite groups no longer exists

"Further information: Representation theory of finite groups § Discrete Fourier transform" is missing 2A0C:5BC0:40:10C0:DE4A:3EFF:FE6D:C214 (talk) 14:57, 4 March 2024 (UTC)

Aren't the Plancherel and Parseval theorem mistaken for each other?

In the "properties" section, the "The Plancherel theorem and Parseval's theorem" subsection asserts that Plancherel is a specific case of Parseval. But the respective Wikipedia pages of the two theorems (https://en.wikipedia.org/wiki/Plancherel_theorem and https://en.wikipedia.org/wiki/Parseval%27s_theorem) say the contrary... 2A01:CB08:46C:8200:E099:9A9:605B:52AF (talk) 05:58, 16 March 2025 (UTC)

Recent YouTube video

I came across a YouTube video recently which appears to be gaining some traction, discussing the topic of mathematics articles on Wikipedia. It begins with some criticism of this article, which editors may find helpful in improving our coverage of the topic. Hence, I'm posting it here for anyone who is interested. Golem08 (talk) 23:52, 6 November 2025 (UTC)

The video is basically a 14 minute digression. It starts off with complaining that Wikipedia is bad at teaching math, only to recognize that Wikpedia is WP:NOTTEXTBOOK. Then he goes on that Wikipedia is also bad as a reference and that the cited references are written by people who are also bad at teaching math. Completely ignoring the fact that publications in mathematical journals are not written to "teach maths". It's like looking up sheet music by Bach, only to complain that it doesn't teach you to play it yourself and that musical notation is not intuitive enough.

The last 10 minutes of the video are about how to test random number generators, which has nothing to do with wikipedia.

That being said, I do think the DFT article is a bit messy. I feel it has been written with an "application focus" in mind, taking very little time to talk about the underlying mathematical context. It may be beneficial to talk a bit more about it's relation to the Fourier transform and/or Fourier series.

Kind regards, Roffaduft (talk) 09:03, 7 November 2025 (UTC)

This article is completely incomprehensible to someone who doesn't already have a decent knowledge of Fourier transforms. (It is useful if you do have that knowledge, however.) I certainly can't write something better. We could add the Expert needed or Technical tag. Mathwriter2718 (talk) 05:00, 1 December 2025 (UTC)

This YouTube video has now been discussed at WikiProject Mathematics twice, in November 2025 and then again in March 2026. Stepwise Continuous Dysfunction (talk) 20:51, 11 March 2026 (UTC)