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[edit]

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

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