CatDat

category of free abelian groups

Satisfied Properties

Assigned properties

Deduced properties

Unsatisfied Properties

Assigned properties

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!

Undecidable properties

There is 1 property for which it cannot be decided if it is satisfied or not.

Special objects

  • terminal object: trivial group
  • initial object: trivial group
  • products: [finite case] direct sums
  • coproducts: direct sums

Special morphisms

  • isomorphisms: bijective homomorphisms
  • monomorphisms: injective homomorphisms
  • epimorphisms: homomorphisms f:ABf : A \to B with the property that f(A)f(A) is not contained in a proper direct summand of BB.
  • regular monomorphisms:
  • regular epimorphisms: