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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.
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ordinal veblen ackermann notation countable ordinals functions uncountable arguments system mathematics certain large named wilhelm term also occasionally used small
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Ackermann ordinal | is a | certain large countable ordinal | 0.90 | text |
| Ackermann ordinal | is a | limit of a system of ordinal notations invented by Ackermann | 0.90 | text |
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