category of schemes
- notation:
- objects: schemes
- morphisms: morphisms of locally ringed spaces
- Related categories: ,
- nLab Link
Satisfied Properties
Properties from the database
- is infinitary extensive
- is locally small
- has pullbacks
- has a terminal object
- is well-powered
Deduced properties
- has binary products
- has finite products
- has equalizers
- has coreflexive equalizers
- is finitely complete
- is Cauchy complete
- has finite powers
- has binary powers
- is connected
- has a multi-terminal object
- has coproducts
- is extensive
- has finite coproducts
- has disjoint finite coproducts
- has disjoint coproducts
- has a strict initial object
- has an initial object
- is distributive
- is infinitary distributive
- is countably distributive
- has countable coproducts
- is locally essentially small
- has a natural numbers object
- is inhabited
- is filtered
- is sifted
- has copowers
- has binary coproducts
- has countable copowers
- has finite copowers
- has binary copowers
- has a multi-initial object
- is cosifted
- is cofiltered
Unsatisfied Properties
Properties from the database
- is not balanced
- does not have countable powers
- does not have a generating set
- is not Malcev
- does not have pushouts
- is not semi-strongly connected
- is not skeletal
Deduced properties*
- does not have countable products
- does not have products
- does not have cofiltered limits
- is not complete
- does not have wide pullbacks
- does not have connected limits
- is not essentially finite
- does not have sequential limits
- does not have directed limits
- does not have powers
- is not multi-complete
- is not cartesian closed
- is not essentially small
- is not small
- is not finite
- is not essentially countable
- is not countable
- does not have a generator
- is not finitary algebraic
- is not a groupoid
- is not mono-regular
- is not normal
- is not direct
- is not thin
- does not have a strict terminal object
- is not right cancellative
- is not left cancellative
- is not one-way
- is not abelian
- is not Grothendieck abelian
- is not split abelian
- is not discrete
- is not essentially discrete
- is not trivial
- is not pointed
- does not have zero morphisms
- does not have kernels
- does not have biproducts
- is not preadditive
- is not additive
- is not accessible
- is not locally presentable
- is not locally ℵ₁-presentable
- is not locally finitely presentable
- is not locally strongly finitely presentable
- is not ℵ₁-accessible
- is not finitely accessible
- is not a generalized variety
- is not locally multi-presentable
- is not locally finitely multi-presentable
- is not locally poly-presentable
- is not multi-algebraic
- is not an elementary topos
- does not have a subobject classifier
- is not locally cartesian closed
- is not a Grothendieck topos
- is not strongly connected
- is not unital
- does not have cosifted limits
- does not have coequalizers
- does not have reflexive coequalizers
- does not have sifted colimits
- does not have connected colimits
- is not cocomplete
- is not finitely cocomplete
- does not have cokernels
- does not have wide pushouts
- is not multi-cocomplete
- does not have disjoint products
- does not have disjoint finite products
- does not have cocartesian cofiltered limits
- is not infinitary codistributive
- is not countably codistributive
- is not infinitary coextensive
- is not codistributive
- is not cocartesian coclosed
- is not coextensive
- is not coregular
- is not epi-regular
- is not conormal
- is not inverse
- is not locally copresentable
- does not have a quotient object classifier
- does not have a regular quotient object classifier
- is not locally cocartesian coclosed
- is not co-Malcev
- is not counital
- is not self-dual
*This also uses the deduced satisfied properties.
Unknown properties
There are 11 properties for which the database doesn't have an answer if they are satisfied or not. Please help to contribute the data!
Special objects
- terminal object:
- initial object: empty scheme
- products: [finite case] The idea is to use and then to glue affine pieces together. See EGA I, Chap. I, Thm. 3.2.1.
- coproducts: disjoint union with the product sheaf
Special morphisms
- isomorphisms: pairs consisting of a homeomorphism and an isomorphism of sheaves
- monomorphisms:
- epimorphisms:
- regular monomorphisms:
- regular epimorphisms: