trivial category
- notation:
- objects: a single object
- morphisms: only the identity morphism
- nLab Link
- Related categories:
This is the simplest category, consisting of a single object and only the identity morphism. It is the terminal object in the category of small categories.
Properties
Properties from the database
Deduced properties
- is essentially finite
- is small
- is essentially small
- is locally small
- is locally essentially small
- is well-copowered
- is well-powered
- is essentially discrete
- is skeletal
- is a groupoid
- is thin
- has connected limits
- is finitary algebraic
- is a Grothendieck topos
- is self-dual
- is split abelian
- has equalizers
- is left cancellative
- has wide pullbacks
- has filtered limits
- has pullbacks
- is Cauchy complete
- has sequential limits
- is locally finitely presentable
- is locally presentable
- is cocomplete
- is complete
- is finitely complete
- has products
- has finite products
- has countable products
- has binary products
- has a terminal object
- is connected
- has a generator
- has exact filtered colimits
- has filtered colimits
- is locally ℵ₁-presentable
- has coproducts
- is an elementary topos
- is cartesian closed
- is infinitary distributive
- is distributive
- has finite coproducts
- has a strict initial object
- has an initial object
- has a subobject classifier
- has disjoint finite coproducts
- has disjoint coproducts
- is epi-regular
- is finitely cocomplete
- has a cogenerator
- is mono-regular
- is abelian
- is additive
- is preadditive
- has zero morphisms
- is pointed
- has coequalizers
- is Grothendieck abelian
- is Malcev
- is inhabited
- is balanced
- has connected colimits
- is right cancellative
- has wide pushouts
- has countable coproducts
- has binary coproducts
- has pushouts
- has a strict terminal object
- has sequential colimits
Non-Properties
Non-Properties from the database
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Deduced Non-Properties*
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*This also uses the deduced properties.
Unknown properties
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Special morphisms
- Isomorphisms: every morphism
- Monomorphisms: every morphism
- Epimorphisms: every morphism