[–] mgraczyk link

Unrelated to the content of the article, but I took two courses with the author. He had a style of teaching that often broadly related the material to seemingly unrelated topics in ways that made lectures fun and easy to remember. I think that style comes across in his writing here.

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[–] mathgenius link

From a mathoverflow thread "Open problems in mathematical physics":

https://mathoverflow.net/questions/275011/open-problems-in-m...

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