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Re:What Is the Minimal Polynomial of a Matrix? by sn41 on Friday April 28, 2023 @09:03PM (#35748973)
Methods from Numerical Linear Algebra are at the heart of a lot of dimensionality reduction techniques.

Moreover, Nick Higham is one of the most prominent numerical analysts today. He spends a lot of time making clear expositions of arcane material (just this blog post is an example - it ends by saying computation is not important in practice, and lists where this method is used.)

He is the editor of the Princeton Companion to Applied Mathematics. He has also written nice books on mathematical writing. He has a recent book on "how to be creative", which is on my to-read list.

So, not really arcane for the HN crowd - at least, not ideally so.

Re:What Is the Minimal Polynomial of a Matrix? by RagnarD on Saturday April 29, 2023 @10:42PM (#35759275)
Well, thank you for an informative response - the kind of reply I wanted.
Re:What Is the Minimal Polynomial of a Matrix? by RagnarD on Saturday April 29, 2023 @11:03PM (#35759368)
I do have to ask: what do you think the "HN" crowd is? And why would they ideally be highly mathematical? It might in fact be interesting to try to statistically characterize the composition of HN readers in terms of professions and interests.