CatDat

poset of extended natural numbers

  • notation: (N,)(\mathbb{N}_\infty, \leq)
  • objects: natural numbers and \infty
  • morphisms: a unique morphism (n,m):nm(n, m) : n \to m if nmn \leq m, where of course nn \leq \infty for all nn
  • Related categories: (N,)(\mathbb{N},\leq)(On,)(\mathbf{On},\leq)

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

There is 1 property for which the database doesn't have an answer if it is satisfied or not. Please help to contribute the data!

Special objects

  • terminal object: \infty
  • initial object: 00
  • products: infimum
  • coproducts: supremum

Special morphisms

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