Definition:Summation/Notation

Notation for Summation

The sign $\sum$ is called the summation sign and sometimes referred to as sigma (as that is its name in Greek).

Sources

• 1982: P.M. Cohn: Algebra Volume 1 (2nd ed.) ... (previous) ... (next): Chapter $2$: Integers and natural numbers: $\S 2.1$: The integers