category of commutative monoids

Notation CMon\CMon Objects commutative monoids Morphisms monoid homomorphisms Related Ab\Ab, CRing\CRing, Mon\Mon External nLab Link

This is the full subcategory of Mon\Mon that consists of commutative monoids. It is a typical example of a one-sorted finitary algebraic category and the "non-additive version" of CRing\CRing.

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!

Special objects

  • terminal object: trivial monoid
  • initial object: trivial monoid
  • products: direct products with pointwise operations
  • coproducts: direct sums

Special morphisms

  • isomorphisms: bijective morphisms
  • monomorphisms: injective morphisms
  • epimorphisms: A morphism in CMon\CMon is an epimorphism iff it is an epimorphism in Mon\Mon, which in turn can be characterized by Isbell's zigzag theorem.
  • regular monomorphisms:
  • regular epimorphisms: surjective morphisms