category of fields of characteristic zero
This is the full subcategory of consisting of fields of characteristic . It is isomorphic to the coslice category .
Satisfied Properties
Assigned properties
- is locally small
- has an initial object
- is left cancellative
- is quotient-trivial
- is multi-algebraic
Deduced properties
- is locally finitely multi-presentable
- is a generalized variety
- is multi-cocomplete
- has effective congruences
- is Cauchy complete
- has coreflexive equalizers
- has effective cocongruences
- has reflexive coequalizers
- has a strict initial object
- has kernel pairs
- is locally essentially small
- is connected
- has a multi-initial object
- is ℵ₁-cofiltered
- is well-copowered
- is epi-regular
- is regular-quotient-trivial
- has connected limits
- is finitely accessible
- has filtered-colimit-stable monomorphisms
- has sifted colimits
- is ℵ₁-accessible
- has quotients of congruences
- is inhabited
- has coquotients of cocongruences
- is cofiltered
- is balanced
- is accessible
- has ℵ₁-filtered colimits
- has filtered colimits
- has coequalizers of kernel pairs
- has equalizers
- has wide pullbacks
- is cosifted
- has cosifted limits
- has an extremal generating set
- is well-powered
- is locally multi-presentable
- is locally poly-presentable
- has directed colimits
- has cofiltered limits
- has pullbacks
- has a generating set
- has cofiltered-limit-stable epimorphisms
- has directed limits
- has sequential colimits
- has ℵ₁-cofiltered limits
- has sequential limits
- is concretizable
Unsatisfied Properties
Assigned properties
- is not skeletal
- is not locally finite
- is not core-thin
- is not semi-strongly connected
- does not have a cogenerating set
- does not have binary powers
- is not locally cartesian closed
- is not mono-regular
- does not have a generator
Deduced properties*
- is not Grothendieck abelian
- is not extensive
- is not strongly connected
- is not discrete
- does not have an extremal generator
- is not a groupoid
- is not normal
- does not have binary products
- does not have finite powers
- does not have a terminal object
- is not essentially finite
- does not have a subobject classifier
- is not subobject-trivial
- is not thin
- is not gaunt
- is not direct
- is not one-way
- is not an elementary topos
- is not a quasitopos
- is not coregular
- does not have disjoint products
- does not have a cogenerator
- does not have an extremal cogenerating set
- is not inverse
- is not self-dual
- does not have a natural numbers object
- is not abelian
- does not have zero morphisms
- does not have binary copowers
- does not have a multi-terminal object
- is not additive
- is not core-connected
- is not trivial
- is not essentially discrete
- is not countably extensive
- is not sifted
- is not one-sorted finitary algebraic
- is not right cancellative
- does not have finite products
- does not have countable powers
- is not finite
- is not regular-subobject-trivial
- is not a Grothendieck topos
- is not a pretopos
- is not coaccessible
- is not cocartesian coclosed
- is not Barr-coexact
- does not have disjoint finite products
- does not have an extremal cogenerator
- is not pointed
- does not have a strict terminal object
- is not essentially small
- does not have a regular quotient object classifier
- does not have coequalizers
- is not unital
- does not have a parametrized natural numbers object
- is not preadditive
- is not split abelian
- does not have biproducts
- is not cartesian closed
- is not finitely complete
- is not multi-complete
- is not infinitary distributive
- is not countably distributive
- is not distributive
- does not have kernels
- does not have cartesian filtered colimits
- does not satisfy CIP
- is not infinitary extensive
- is not filtered
- does not have binary coproducts
- does not have countable products
- does not have ℵ₂-small powers
- is not small
- is not essentially countable
- does not have disjoint finite coproducts
- is not counital
- is not locally copresentable
- is not locally cocartesian coclosed
- is not cocomplete
- is not finitely cocomplete
- is not codistributive
- does not have cokernels
- does not satisfy CSP
- is not coextensive
- is not conormal
- does not have finite copowers
- does not have connected colimits
- does not have cokernel pairs
- does not have a quotient object classifier
- is not Malcev
- is not locally finitely presentable
- is not locally ℵ₁-presentable
- is not locally presentable
- is not finitary algebraic
- is not complete
- is not regular
- does not have disjoint coproducts
- does not have exact filtered colimits
- is not ℵ₁-filtered
- does not have ℵ₂-small products
- does not have powers
- is not countable
- does not have a regular subobject classifier
- is not total
- is not co-Malcev
- does not have wide pushouts
- is not countably codistributive
- does not have exact cofiltered limits
- is not countably coextensive
- does not have finite coproducts
- does not have pushouts
- does not have countable copowers
- does not have equalizers of cokernel pairs
- is not cototal
- does not have products
- is not Barr-exact
- is not infinitary codistributive
- does not have cocartesian cofiltered limits
- is not infinitary coextensive
- does not have countable coproducts
- does not have ℵ₂-small copowers
- does not have ℵ₂-small coproducts
- does not have copowers
- does not have coproducts
*This also uses the deduced satisfied properties.
Unknown properties
—
Special objects
- initial object:
Special morphisms
- isomorphisms: bijective field homomorphisms
- monomorphisms: every morphism
- epimorphisms: same as isomorphisms
- regular monomorphisms: A Galois extension is a regular monomorphism iff it is procyclic, and the general case can be reduced to this situation; see MSE/5129895 for details.
- regular epimorphisms: same as isomorphisms
Comments
- Limits and colimits are discussed in MSE/359352.