Homonym: \sigma (Summation)
The symbol "\sigma" is commonly used in mathematics and statistics to represent standard deviation, which measures the amount of variation or dispersion in a set of values. A low standard deviation indicates that the values tend to be close to the mean, while a high standard deviation indicates that the values are spread out over a wider range.
In addition to its statistical use, "\sigma" also represents the summation operator in mathematics, denoting the sum of a sequence of numbers. This operator is often used in formulas and equations to simplify the process of adding multiple terms together, making calculations more efficient.