Zeta (letter)
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| Greek alphabet | |
|---|---|
| Α α Alpha | Β β Beta |
| Γ γ Gamma | Δ δ Delta |
| Ε ε Epsilon | Ζ ζ Zeta |
| Η η Eta | Θ θ Theta |
| Ι ι Iota | Κ κ Kappa |
| Λ λ Lambda | Μ μ Mu |
| Ν ν Nu | Ξ ξ Xi |
| Ο ο Omicron | Π π Pi |
| Ρ ρ Rho | Σ σ Sigma |
| Τ τ Tau | Υ υ Upsilon |
| Φ φ Phi | Χ χ Chi |
| Ψ ψ Psi | Ω ω Omega |
| obsolete letters | |
| [[Digamma|Template:Polytonic Digamma]] | [[San (letter)|Template:Polytonic San]] |
| [[Qoppa|Template:Polytonic Qoppa]] | [[Sampi|Template:Polytonic Sampi]] |
Zeta (upper case Ζ, lower case ζ) is the sixth letter of the Greek alphabet. In the system of Greek numerals it has a value of 7.
The lower-case letter ζ is used as symbol for:
- The Riemann zeta function and other zeta functions in mathematics.
- In polymer dynamics, the coefficient of viscous friction.
- In astronomy, the sixth brightest (usually) star in a constellation. See Bayer designation.
Letters related to Zeta include the Roman Z.
See also Z (movie).da:Zeta (bogstav) de:Zeta (Buchstabe) es:Dseda fi:Zeeta fr:Ζ ja:Ζ la:Zeta nl:Zèta sv:zeta