CatDat

delooping of an infinite countable group

  • notation: BGBG
  • objects: a single object
  • morphisms: the elements of an infinite countable group GG
  • Related categories: BGBGBNB\IN
  • nLab Link

Every group GG yields a groupoid BGBG with a single object *, morphisms given by the elements of GG, and composition given by the group operation. In this example, we consider the case of an infinite countable group GG (such as G=ZG = \IZ).

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 monomorphisms
  • regular epimorphisms: same as isomorphisms