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tedunangst
on Jan 2, 2011
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The rules for using "ſ" (long s)
wikipedia tells me it is because S stands for the latin word summa.
ludwigvan
on Jan 2, 2011
[–]
Exactly.(Riemann) integral is summation with infinitesimal quantities. (It was Leibniz who used long s to denote integration, though.
http://jeff560.tripod.com/calculus.html
) Also, for discrete summation, capital 's'igma is used.
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