\nuThe Greek letter nu, represented as \nu in LaTeX, is often used in mathematics and science to denote frequency, a degree of freedom in statistics, or a neutrino in particle physics.
Frequency of a wave, where c is the speed of light and \lambda is the wavelength.
\nu = \frac{c}{\lambda}Chi-squared distribution with \nu degrees of freedom.
\chi^2_{\nu}Electron antineutrino in particle physics.
\bar{\nu}_e