category of Z-functors
This category is used in functorial algebraic geometry. It also provides a typical example of a functor category that is not locally small, but nevertheless relevant. Most of its properties are directly derived from the category of sets, so other functor categories for large categories will be similar.
Satisfied properties
Assigned properties
- is complete
- is cocomplete
- is infinitary extensive
- has exact filtered colimits
- is regular
- is coregular
- has effective congruences
Deduced properties
- has connected limits
- is finitely complete
- has products
- is multi-complete
- has filtered colimits
- has filtered-colimit-stable monomorphisms
- has cartesian filtered colimits
- has coproducts
- is countably extensive
- has coequalizers of kernel pairs
- has pullback-stable regular epimorphisms
- is Barr-exact
- has connected colimits
- is finitely cocomplete
- is multi-cocomplete
- has equalizers of cokernel pairs
- has pushout-stable regular monomorphisms
- has equalizers
- has finite products
- has a multi-terminal object
- has quotients of congruences
- is Cauchy complete
- has countable coproducts
- is extensive
- is filtered
- has directed colimits
- has ℵ₁-filtered colimits
- has sifted colimits
- has powers
- has ℵ₂-small products
- has wide pullbacks
- has kernel pairs
- has pullbacks
- has coequalizers
- has finite coproducts
- has a multi-initial object
- is cofiltered
- has cosifted limits
- has copowers
- has ℵ₂-small coproducts
- has wide pushouts
- has cokernel pairs
- has pushouts
- has effective cocongruences
- is mono-regular
- has coreflexive equalizers
- has disjoint finite coproducts
- has a strict initial object
- is distributive
- is infinitary distributive
- is countably distributive
- is sifted
- is ℵ₁-filtered
- has reflexive coequalizers
- has countable products
- has ℵ₂-small powers
- has binary products
- has a terminal object
- has finite powers
- has cofiltered limits
- is a pretopos
- is cosifted
- has sequential colimits
- has ℵ₂-small copowers
- has binary coproducts
- has an initial object
- has countable copowers
- has finite copowers
- has a natural numbers object
- has a parametrized natural numbers object
- has disjoint coproducts
- has cocartesian cofiltered limits
- is connected
- has sequential limits
- is balanced
- has countable powers
- has binary powers
- has a conatural numbers object
- has coquotients of cocongruences
- is ℵ₁-cofiltered
- has directed limits
- has ℵ₁-cofiltered limits
- has binary copowers
- is Barr-coexact
- is inhabited
- is epi-regular
- is co-Malcev
Unsatisfied properties
Assigned properties
- is not skeletal
- is not Malcev
- is not semi-strongly connected
- is not locally essentially small
- is not cartesian closed
- is not well-powered
- does not have a subobject classifier
- does not have a generating collection
- does not have a cogenerator
Deduced properties*
- is not thin
- is not additive
- is not accessible
- is not locally cartesian closed
- is not strongly connected
- is not essentially discrete
- does not have a cogenerating collection
- does not have a generator
- does not have an extremal generating collection
- is not essentially small
- is not locally small
- is not locally finite
- is not concretizable
- does not have a regular subobject classifier
- is not subobject-trivial
- is not gaunt
- is not direct
- is not an elementary topos
- is not a Grothendieck topos
- is not total
- is not coaccessible
- is not co-Grothendieck abelian
- is not dually one-sorted finitary algebraic
- is not coextensive
- does not have an extremal cogenerator
- is not well-copowered
- is not inverse
- is not cototal
- is not self-dual
- is not locally presentable
- is not ℵ₁-accessible
- is not locally multi-presentable
- is not locally poly-presentable
- is not preadditive
- is not abelian
- is not Grothendieck abelian
- is not one-sorted finitary algebraic
- does not have zero morphisms
- is not core-connected
- is not trivial
- is not discrete
- does not have a strict terminal object
- does not have cofiltered-limit-stable epimorphisms
- is not left cancellative
- does not have an extremal generator
- is not a groupoid
- is not small
- is not essentially finite
- is not essentially countable
- is not right cancellative
- is not regular-subobject-trivial
- is not retract-trivial
- is not core-thin
- is not a quasitopos
- is not locally copresentable
- is not ℵ₁-coaccessible
- is not locally multi-copresentable
- is not locally poly-copresentable
- is not cocartesian coclosed
- does not have disjoint finite products
- is not countably coextensive
- does not have an extremal cogenerating collection
- does not have a regular quotient object classifier
- is not quotient-trivial
- is not regular-quotient-trivial
- is not a precotopos
- is not pointed
- is not locally ℵ₁-presentable
- is not finitely accessible
- is not split abelian
- does not have biproducts
- is not a generalized variety
- does not have kernels
- does not satisfy CIP
- is not normal
- is not finite
- is not countable
- is not one-way
- is not locally ℵ₁-copresentable
- is not finitely coaccessible
- is not a dual generalized variety
- is not locally cocartesian coclosed
- does not have disjoint products
- is not codistributive
- does not have cokernels
- does not have exact cofiltered limits
- does not satisfy CSP
- is not infinitary coextensive
- is not conormal
- does not have a quotient object classifier
- is not an elementary cotopos
- is not a Grothendieck cotopos
- is not a quasicotopos
- is not unital
- is not locally finitely presentable
- is not finitary algebraic
- is not locally finitely multi-presentable
- is not multi-algebraic
- is not counital
- does not have a coparametrized conatural numbers object
- is not locally finitely copresentable
- is not dually finitary algebraic
- is not locally finitely multi-copresentable
- is not dually multi-algebraic
- is not countably codistributive
- is not infinitary codistributive
*This also uses the deduced satisfied properties.
Unknown properties
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Special objects
- terminal object: constant functor with value
- initial object: constant functor with value
- products: pointwise defined direct product
- coproducts: pointwise disjoint union
Special morphisms
- isomorphisms: natural isomorphisms
- monomorphisms: pointwise injective natural transformations
- epimorphisms: pointwise surjective natural transformations
- regular monomorphisms: same as monomorphisms
- regular epimorphisms: same as epimorphisms