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I love the fact that it’s commonly believed the writer (and mathematician!) Lewis Carroll could have done a math diss on quaternions, their unintuitive multiplication and their non-commutative nature in the Mad Hatter scene in “Alice in Wonderland”.
“Why, you might just as well say that I see what I eat is the same thing as I eat what I see !”
All credits to 3Blue1Brown on Youtube (Video: “Visualising quaternions (4d numbers) with stereographic projection”)