Zeta

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 the film Z.

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

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