CatDat

poset [0,1]

  • notation: ([0,1],)([0,1],\leq)
  • objects: real numbers between 00 and 11
  • morphisms: a unique morphism (s,t):st(s,t) : s \to t when sts \leq t
  • Related categories: (N,)(\IN_\infty, \leq)
  • nLab Link

Every poset can be regarded as a small thin category. This is a specific example. This category is locally 1\aleph_1-presentable (in fact, every object is 1\aleph_1-presentable), but not locally finitely presentable (in fact, only 00 is finitely presentable).

Satisfied Properties

Assigned properties

Deduced properties

Unsatisfied Properties

Assigned properties

Deduced properties*

*This also uses the deduced satisfied properties.

Unknown properties

Special objects

  • terminal object: 11
  • 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