category of groups
- notation:
- objects: groups
- morphisms: group homomorphisms
- Related categories: ,
- nLab Link
This is the prototype of a finitary algebraic category.
Satisfied Properties
Properties from the database
- has disjoint coproducts
- is epi-regular
- is finitary algebraic
- is locally small
- is Malcev
- is mono-regular
- is pointed
Deduced properties
- has an initial object
- has zero morphisms
- has coproducts
- has disjoint finite coproducts
- has finite coproducts
- is locally essentially small
- has a generator
- has a generating set
- is inhabited
- is balanced
- is locally strongly finitely presentable
- is strongly connected
- is well-copowered
- is regular
- is finitely complete
- has equalizers
- has coreflexive equalizers
- has finite products
- has binary products
- has a terminal object
- is connected
- has pullbacks
- is Cauchy complete
- has finite powers
- has binary powers
- has disjoint products
- is locally finitely presentable
- is locally presentable
- is locally ℵ₁-presentable
- is cocomplete
- is complete
- has connected limits
- has products
- has countable products
- has wide pullbacks
- has cofiltered limits
- has sequential limits
- has powers
- has countable powers
- is well-powered
- has exact filtered colimits
- has filtered colimits
- has directed colimits
- is unital
- has connected colimits
- has sifted colimits
- has reflexive coequalizers
- is finitely cocomplete
- has cosifted limits
- has countable coproducts
- has binary coproducts
- has coequalizers
- has sequential colimits
- has pushouts
- has directed limits
- has wide pushouts
- has copowers
- has countable copowers
- has finite copowers
- has binary copowers
- has disjoint finite products
Unsatisfied Properties
Properties from the database
- does not have a cogenerator
- is not coregular
- is not counital
- is not skeletal
- does not have a subobject classifier
Deduced properties*
- is not direct
- is not discrete
- is not Grothendieck abelian
- is not abelian
- is not additive
- is not preadditive
- is not split abelian
- is not trivial
- is not thin
- does not have a strict terminal object
- does not have a strict initial object
- is not left cancellative
- is not right cancellative
- is not distributive
- is not infinitary distributive
- is not cartesian closed
- is not extensive
- is not infinitary extensive
- is not lextensive
- is not a groupoid
- is not one-way
- is not essentially discrete
- is not essentially small
- is not small
- is not finite
- is not essentially finite
- is not self-dual
- is not an elementary topos
- does not have a regular subobject classifier
- is not locally cartesian closed
- is not a Grothendieck topos
- does not have biproducts
- is not codistributive
- is not infinitary codistributive
- is not coextensive
- is not infinitary coextensive
- does not have a cogenerating set
- is not inverse
- is not co-Malcev
*This also uses the deduced satisfied properties.
Unknown properties
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Special objects
- terminal object: trivial group
- initial object: trivial group
- products: direct products with pointwise operations
- coproducts: free products
Special morphisms
- isomorphisms: bijective homomorphisms
- monomorphisms: injective homomorphisms
- epimorphisms: surjective homomorphisms
- regular monomorphisms: same as monomorphisms
- regular epimorphisms: surjective homomorphisms