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- Ackermann_ordinal abstract "In mathematics, the Ackermann ordinal is a certain large countable ordinal, named after Wilhelm Ackermann. The term "Ackermann ordinal" is also occasionally used for the small Veblen ordinal, a somewhat larger ordinal. Unfortunately there is no standard notation for ordinals beyond the Feferman–Schütte ordinal Γ0. Most systems of notation use symbols such as ψ(α), θ(α), ψα(β), some of which are modifications of the Veblen functions to produce countable ordinals even for uncountable arguments, and some of which are "collapsing functions".The smaller Ackermann ordinal is the limit of a system of ordinal notations invented by Ackermann (1951), and is sometimes denoted by or or . Ackermann's system of notation is weaker than the system introduced much earlier by Veblen (1908), which he seems to have been unaware of.".
- Ackermann_ordinal wikiPageID "16137162".
- Ackermann_ordinal wikiPageRevisionID "551706059".
- Ackermann_ordinal hasPhotoCollection Ackermann_ordinal.
- Ackermann_ordinal subject Category:Ordinal_numbers.
- Ackermann_ordinal type Abstraction100002137.
- Ackermann_ordinal type DefiniteQuantity113576101.
- Ackermann_ordinal type Measure100033615.
- Ackermann_ordinal type Number113582013.
- Ackermann_ordinal type OrdinalNumber113597280.
- Ackermann_ordinal type OrdinalNumbers.
- Ackermann_ordinal comment "In mathematics, the Ackermann ordinal is a certain large countable ordinal, named after Wilhelm Ackermann. The term "Ackermann ordinal" is also occasionally used for the small Veblen ordinal, a somewhat larger ordinal. Unfortunately there is no standard notation for ordinals beyond the Feferman–Schütte ordinal Γ0.".
- Ackermann_ordinal label "Ackermann ordinal".
- Ackermann_ordinal sameAs m.03y055n.
- Ackermann_ordinal sameAs Q4674253.
- Ackermann_ordinal sameAs Q4674253.
- Ackermann_ordinal sameAs Ackermann_ordinal.
- Ackermann_ordinal wasDerivedFrom Ackermann_ordinal?oldid=551706059.
- Ackermann_ordinal isPrimaryTopicOf Ackermann_ordinal.