\varXi
The uppercase Greek letter Xi, denoted as \varXi, is used in various scientific and mathematical contexts. It often represents random variables, statistical distributions, or specific mathematical functions in advanced mathematics and physics.
Represents a specific integral in calculus.
\varXi = \int_{a}^{b} f(x) \, dx
Used in probability theory to denote a random variable.
P(\varXi > x) = 1 - F(x)
Represents a sum of random variables in statistics.
\varXi_n = \sum_{i=1}^{n} X_i