walking idempotent
The name of this category comes from the fact that a functor is the same as an idempotent morphism in . It can also be seen as the delooping of the monoid in which .
Satisfied Properties
Assigned properties
- is small
- is finite
- is gaunt
- is self-dual
- has a generator
- is subobject-trivial
- is preadditive
- is ℵ₁-filtered
Deduced properties
- is locally essentially small
- has zero morphisms
- has coreflexive equalizers
- has reflexive coequalizers
- is filtered
- has a generating set
- is inhabited
- is essentially small
- is locally small
- is countable
- is essentially finite
- is mono-regular
- is core-thin
- is skeletal
- is ℵ₁-cofiltered
- has a cogenerator
- is quotient-trivial
- has quotients of congruences
- has effective congruences
- is strongly connected
- is sifted
- is balanced
- is normal
- is well-copowered
- is well-powered
- is essentially countable
- is locally finite
- has coquotients of cocongruences
- has effective cocongruences
- is cofiltered
- has a cogenerating set
- is epi-regular
- is semi-strongly connected
- is connected
- is cosifted
- is conormal
Unsatisfied Properties
Assigned properties
- does not have a terminal object
- is not Cauchy complete
Deduced properties*
- is not accessible
- is not left cancellative
- does not have a multi-terminal object
- does not have equalizers
- is not thin
- does not have sequential colimits
- does not have ℵ₁-filtered colimits
- does not have finite products
- does not have finite powers
- is not coaccessible
- is not right cancellative
- does not have coequalizers
- does not have sequential limits
- does not have ℵ₁-cofiltered limits
- is not pointed
- does not have a strict terminal object
- does not have an initial object
- is not unital
- does not have a natural numbers object
- is not locally presentable
- is not ℵ₁-accessible
- is not locally multi-presentable
- is not locally poly-presentable
- does not have finite coproducts
- is not additive
- does not have biproducts
- is not cartesian closed
- is not complete
- is not finitely complete
- is not multi-complete
- is not essentially discrete
- is not infinitary distributive
- is not countably distributive
- is not distributive
- does not have binary products
- does not have kernels
- does not have cartesian filtered colimits
- does not have directed limits
- is not direct
- does not have filtered colimits
- is not a groupoid
- does not have a strict initial object
- does not have countable products
- does not have countable powers
- does not have connected limits
- does not have binary powers
- is not one-way
- does not have powers
- is not counital
- is not locally copresentable
- is not cocomplete
- is not finitely cocomplete
- does not have a multi-initial object
- does not have disjoint finite products
- is not codistributive
- does not have binary coproducts
- does not have cokernels
- is not coextensive
- does not have directed colimits
- is not inverse
- does not have cofiltered limits
- does not have finite copowers
- does not have connected colimits
- does not have binary copowers
- does not have countable copowers
- does not have copowers
- is not Malcev
- is not locally finitely presentable
- is not locally ℵ₁-presentable
- is not Grothendieck abelian
- is not finitely accessible
- is not locally strongly finitely presentable
- is not locally finitely multi-presentable
- is not abelian
- is not a generalized variety
- is not regular
- is not trivial
- is not discrete
- does not have disjoint finite coproducts
- does not have exact filtered colimits
- does not have filtered-colimit-stable monomorphisms
- is not extensive
- does not have sifted colimits
- does not have products
- does not have ℵ₂-small products
- does not have ℵ₂-small powers
- does not have wide pullbacks
- does not have a subobject classifier
- does not have a regular subobject classifier
- is not an elementary topos
- is not a Grothendieck topos
- is not co-Malcev
- is not cocartesian coclosed
- is not multi-cocomplete
- is not coregular
- does not have disjoint products
- is not infinitary codistributive
- is not countably codistributive
- does not have exact cofiltered limits
- does not have cocartesian cofiltered limits
- does not have cofiltered-limit-stable epimorphisms
- is not infinitary coextensive
- does not have cosifted limits
- does not have coproducts
- does not have countable coproducts
- does not have ℵ₂-small copowers
- does not have wide pushouts
- does not have a quotient object classifier
- does not have a regular quotient object classifier
- is not split abelian
- is not finitary algebraic
- is not multi-algebraic
- is not Barr-exact
- does not have disjoint coproducts
- does not satisfy CIP
- is not infinitary extensive
- does not have pullbacks
- is not a pretopos
- is not Barr-coexact
- does not satisfy CSP
- does not have ℵ₂-small coproducts
- does not have pushouts
- is not locally cartesian closed
- is not locally cocartesian coclosed
*This also uses the deduced satisfied properties.
Unknown properties
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Special objects
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Special morphisms
- isomorphisms: the identity
- monomorphisms: the identity
- epimorphisms: the identity
- regular monomorphisms: the identity
- regular epimorphisms: the identity