matematiske symboler
C. Kramp 1808 \(\sum\) \(\sum_{n=1}^{4}n^2 = 1^2 + 2^2 + 3^2 + 4^2\) sum L. Euler 1755 \(\prod\) \(\prod_{k=1}^{5}k = 1 \cdot 2 \cdot 3 \cdot 4 \cdot 5\) produkt C.F. Gauss 1812 \(\int\) \(\int f(x) \: dx\) integral G.W. Leibniz