CatDat

poset of ordinal numbers

  • notation: (On,)(\mathbf{On},\leq)
  • objects: ordinal numbers
  • morphisms: a unique morphism (α,β):αβ(\alpha,\beta): \alpha \to \beta if αβ\alpha \leq \beta
  • Related categories: (N,)(\mathbb{N},\leq)

This is a large variant of the poset of natural numbers.

Satisfied Properties

Properties from the database

Deduced properties

Unsatisfied Properties

Properties from the database

Deduced properties*

*This also uses the deduced satisfied properties.

Unknown properties

Special objects

  • initial object: 00
  • coproducts: supremum

Special morphisms

  • isomorphisms: only the identities
  • monomorphisms: every morphism
  • epimorphisms: every morphism
  • regular monomorphisms: same as isomorphisms
  • regular epimorphisms: same as isomorphisms