Nu (letter)

Nu (upper case Ν, lower case ν) is the 13th letter of the Greek alphabet. In the system of Greek numerals it has a value of 50.

The lower-case letter ν is used as a symbol for:

• The frequency of a wave in physics and other fields.
• Any of three kinds of neutrino in particle physics.
• One of the Greeks in mathematical finance, known as "vega".