enginerd

One who understands not only the mathematical use of Greek letters as variables and numbers, but has also learned of the basis and origin of these Greek letters: that the ancient Greeks left a snake in a room and came back at certain time intervals to check what shape the snake was in, and thus based their letters on that shape.

Take a look at the Greek letter "eta", and realize how much that looks like a snake in some random position. Then look at lowercase "delta". Then move on from there

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