ordinal number
C33494
concept
An ordinal number is a mathematical concept that generalizes the notion of ordering by representing the position of elements in a well-ordered set, extending beyond finite sequences to infinite hierarchies.
Observed surface forms (4)
| Surface form | Occurrences |
|---|---|
| countable ordinal | 2 |
| large countable ordinal | 1 |
| ordinal notation | 1 |
| proof-theoretic ordinal | 1 |
Instances (4)
| Instance | Via concept surface |
|---|---|
| I | — |
| Feferman–Schütte ordinal | countable ordinal |
| Cantor normal form | ordinal notation |
| Bachmann–Howard ordinal | countable ordinal |