CatDat

category of finite sets and bijections

This category is also known as the permutation groupoid. It appears in the definition of a combinatorial species.

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

Special morphisms

  • isomorphisms: every morphism
  • monomorphisms: every morphism
  • epimorphisms: every morphism
  • regular monomorphisms: same as monomorphisms
  • regular epimorphisms: same as epimorphisms