Huh! I’d read about the belt trick, but never actually tried it. It works! It’s magical! Or at least highly surprising. Also quantum and stuff. https://en.m.wikipedia.org/wiki/Plate_trick …pic.twitter.com/iLVZ65s8B9
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Smells like quaternion witchcraft to me.
Yup! I was motivated by @EricRWeinstein mentioning spinors today, and I thought “hmm, I vaguely remember those are sort of like tensors but for electron spin; I should have a lay understanding of them,” so I read the Wikipedia article. It’s pretty good! https://en.wikipedia.org/wiki/Spinor
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