# Nu (letter)

Nu (uppercase/lowercase Ν ν) is a letter of the Greek alphabet used to represent the "n" sound in Ancient and Modern Greek. In the system of Greek numerals, it has a value of 50. Letters that came from it include the Roman N and Cyrillic Н.

In statistics, the lowercase ${\displaystyle \nu }$ can be used to represent degrees of freedom.[1] In physics, the same letter can also used to represent kinematic viscosity and the frequency of a wave.[2]

## References

1. "Greek/Hebrew/Latin-based Symbols in Mathematics". Math Vault. 2020-03-20. Retrieved 2020-10-06.
2. "Nu Symbol in Greek Alphabet". www.greeksymbols.net. Retrieved 2020-10-06.