CatDat

category of finite ordered sets

The finite ordered sets of the form {1<<n}\{1 < \dotsc < n\} for nNn \in \mathbb{N} provide a skeleton (including the empty set for n=0n = 0), the augmented simplex category.

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 are 2 properties for which the database doesn't have an answer if they are satisfied or not. Please help to contribute the data!

Special objects

  • terminal object: singleton ordered set
  • initial object: empty ordered set
  • products: [finite case] direct products with the evident order

Special morphisms

  • isomorphisms: bijective order-preserving maps
  • monomorphisms: injective order-preserving maps
  • epimorphisms: surjective order-preserving maps
  • regular monomorphisms: same as monomorphisms
  • regular epimorphisms: same as epimorphisms