category of finite sets and bijections

Notation B\IB Objects finite sets Morphisms bijective maps Related FI\FIFS\FSFinSet\FinSet External nLab Link

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

Satisfied Properties

Assigned properties

Deduced properties

Unsatisfied Properties

Assigned properties

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 isomorphisms
  • regular epimorphisms: same as isomorphisms