Calculus Integral Sign: proof showing it has geometry and curves of the integral of 1 or 1/2....

[notorab]

Leibniz used this symbol and it derives from Latin S.  I show both here and how the curves are taken from curves of continued Calculus integrals starting at 1 or 1/2.  Asking the Typography community if they can confirm this and if this has been investigated.

 

https://math.stackexchange.com/questions/4978914/original-leibniz-integral-symbol-notation-are-curves-of-antiderivatives-combine