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Greek alphabet
Α α Alpha	Ν ν Nu
Β β Beta	Ξ ξ Xi
Γ γ Gamma	Ο ο Omicron
Δ δ Delta	Π π Pi
Ε ε Epsilon	Ρ ρ Rho
Ζ ζ Zeta	Σ σ ς Sigma
Η η Eta	Τ τ Tau
Θ θ Theta	Υ υ Upsilon
Ι ι Iota	Φ φ Phi
Κ κ Kappa	Χ χ Chi
Λ λ Lambda	Ψ ψ Psi
Μ μ Mu	Ω ω Omega
Obsolete letters
Ϝ ϝ Digamma	Ϻ ϻ San
Ϙ ϙ Qoppa	Ϡ ϡ Sampi
Ϛ ϛ Stigma	Ϸ ϸ Sho

For other uses, see Nu.

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. Its Latin Alphabet equivalent is N.

The word nu is written νῦ in traditional Greek polytonic orthography. In Modern Greek it is sometimes written νι (ni). Either version is pronounced [ni], like the English word knee.

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

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

Nu is also the namesake of the RX-93 ν Gundam.als:Ν br:Nu (lizherenn) ca:Ν de:Ny arc:Ν el:Νι es:Ν eu:Ny fr:Nu (lettre grecque) gd:Nu ko:Ν it:Nu (lettera) he:נו (אות) hu:Nü nl:Nu (letter) ja:Ν nds:Ny pl:Ni (litera) pt:Ν ru:Ню (буква) sv:Ny zh:Ν