The curly S integral sign, ∫, was made up by the German polymath Gottfried Wilhelm von Leibniz in the 17th century. An S was chosen because an integral is a limit of sums.
See the S?
↓
Sums
Leibniz was a unique and prolific thinker. (We are glad to have him as our patron saint.) Among his frequently strange views, he believed that ours is the best of all possible worlds. I myself believe that his was the best of all possible wigs.
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