epsilon number

English dictionary entry

Meanings

noun
  1. 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.

Word forms

epsilon number epsilon numbers

Etymology

From the Greek letter ε (“epsilon”), used to denote the numbers.

Related words

delta number gamma number epsilon-induction
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