Summa (mathematics)

The term summa is the Latin word for sum. It is also used as the name for the ∫ symbol used to represent the integral in calculus. It was first used to represent the limiting sum (Riemann sum) that inspired the integral by Leibniz on October 29, 1675.

References

Burton, David M. The History of Mathematics - An Introduction, McGraw-Hill, 2002. ISBN 0-07-288523-8

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