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\mathbb{N}
  • 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 = \mathbb{Z}).

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

Special objects

Special morphisms

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