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Where do those undergraduate divisibility problems come from?

Chris Grossack's math blog and professional website.

I’ve wanted to write a post on Pólya-Redfield counting for years now, since it was a pet topic of mine as an undergrad, but I think I was always planning too big a scope. I realized I don’t actually understand that as well as I thought I did, so I had to spend some time rereading a bunch of physics stuff, which was super fun, even if it took a while, haha. Of course, I also need to get the topological topos posts cleaned up and submitted to journals, and I have a fun project that I want to finish up which will be interesting to categorical logicians and algebraic geometers!

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