Greek Capital Letter Sigma

Σ
Symbol Format Data
Σ Code Point
U+03A3
TeX
\Sigma
SVG

Usage

The capital Greek letter (capital sigma) is used in algebra to represent the summation operator. Typically, the symbol appears in an expression like this:

In plain language this expression means sum together the expressions represented by starting from and ending when .

Related

The Greek letter σ (sigma) is used in statistics to represent the standard deviation of a population.