Epsilon

Sponsorship the way you would do it

Greek letters
Α α Alpha	Β β Beta
Γ γ Gamma	Δ δ Delta
Ε ε Epsilon	Ϝ ϝ Digamma
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	Ϻ ϻ San
Ϙ ϙ Qoppa	Ρ ρ Rho
Σ σ Sigma	Τ τ Tau
Υ υ Upsilon	Φ φ Phi
Χ χ Chi	Ψ ψ Psi
Ω ω Omega	Ϡ ϡ Sampi
Greek alphabet

Epsilon (upper case Ε, lower case ε) is the 5th letter of the Greek alphabet. In the system of Greek numerals it has a value of 5.

The lower-case letter ε is used as the symbol for:

The Levi-Civita symbol in mathematics.
Set membership in mathematics.
The permittivity of a medium in physics.

There is a company that has this name:

Epsilon S.A - studio company

Letters that arose from Epsilon include the Roman E.