\Gamma
The capital Greek letter Gamma (\Gamma) is often used in mathematics and science. In mathematics, it can represent a variety of concepts, such as the Gamma function, which generalizes the factorial function to complex numbers. In physics, it might denote a photon or a gamma ray. In statistics, it can be used to represent the gamma distribution.
Gamma function, which extends the factorial to complex numbers.
\Gamma(n) = (n-1)!
Cumulative distribution function of the gamma distribution.
P(X > x) = 1 - \Gamma(k, \lambda x)
Relativistic energy-momentum relation, where \Gamma is the Lorentz factor.
E = \Gamma m c^2