The study of error in mathematical approximations.

The name for the fifth letter of the Greek alphabet, ε or Ε, preceded by delta (Δ, δ) and followed by zeta (Ζ, ζ).

plural of epsilon

Relating to epsilonics.

(mathematics) To convert small errors to zero or to treat them as arbitrarily small

(astronomy) Latinized form of the Bayer designation ε Pegasi, named Enif.

hexaferrum

plural of epsilon number

(set theory) Any (necessarily transfinite) ordinal number α such that ω^α = α; (by generalisation) any surreal number that is a fixed point of the exponential map x → ωˣ.

plural of epsilon-machine