category of Hausdorff spaces
- notation:
- objects: Hausdorff spaces
- morphisms: continuous functions
- Related categories: , ,
- nLab Link
This is the full subcategory of consisting of those spaces that are Hausdorff.
Satisfied Properties
Assigned properties
- is locally small
- has a generator
- is semi-strongly connected
- has equalizers
- has products
- is cocomplete
- is infinitary extensive
- is well-powered
- is well-copowered
- is co-Malcev
- has effective cocongruences
Deduced properties
- is complete
- is connected
- has coreflexive equalizers
- is Cauchy complete
- has coproducts
- is extensive
- has a generating set
- is inhabited
- has countable products
- has powers
- is locally essentially small
- is finitely cocomplete
- has connected colimits
- has coequalizers
- is multi-cocomplete
- is cofiltered
- has connected limits
- is finitely complete
- is multi-complete
- has finite coproducts
- has disjoint finite coproducts
- has a strict initial object
- is filtered
- has sequential limits
- has sifted colimits
- has countable powers
- has finite products
- has a multi-initial object
- has coquotients of cocongruences
- has reflexive coequalizers
- is cosifted
- has copowers
- has countable coproducts
- has wide pushouts
- has a multi-terminal object
- has quotients of congruences
- has disjoint coproducts
- is distributive
- is infinitary distributive
- is sifted
- has filtered colimits
- has an initial object
- has binary products
- has a terminal object
- has finite powers
- has wide pullbacks
- has sequential colimits
- has cosifted limits
- has binary coproducts
- has countable copowers
- has finite copowers
- has pushouts
- is countably distributive
- has directed colimits
- has binary powers
- has pullbacks
- has cofiltered limits
- has binary copowers
- has a natural numbers object
- has cocartesian cofiltered limits
- has directed limits
Unsatisfied Properties
Assigned properties
- is not skeletal
- is not balanced
- is not Malcev
- does not have a regular subobject classifier
- does not have cartesian filtered colimits
- does not have cofiltered-limit-stable epimorphisms
- does not have filtered-colimit-stable monomorphisms
Deduced properties*
- is not thin
- is not additive
- is not locally finitely multi-presentable
- is not cartesian closed
- is not discrete
- does not have exact filtered colimits
- does not have biproducts
- is not left cancellative
- is not subobject-trivial
- is not essentially finite
- is not mono-regular
- is not right cancellative
- does not have a subobject classifier
- is not gaunt
- is not direct
- does not have exact cofiltered limits
- is not coextensive
- is not quotient-trivial
- is not epi-regular
- is not inverse
- is not self-dual
- is not locally finitely presentable
- is not finitely accessible
- is not preadditive
- is not abelian
- is not Grothendieck abelian
- is not multi-algebraic
- is not locally cartesian closed
- does not have effective congruences
- is not trivial
- is not essentially discrete
- does not have a strict terminal object
- is not a groupoid
- is not normal
- is not finite
- is not core-thin
- is not locally finite
- is not essentially small
- is not essentially countable
- is not an elementary topos
- is not a Grothendieck topos
- is not cocartesian coclosed
- does not have disjoint finite products
- is not infinitary coextensive
- is not conormal
- does not have a quotient object classifier
- does not have a regular quotient object classifier
- is not pointed
- is not locally strongly finitely presentable
- is not split abelian
- is not a generalized variety
- is not Barr-exact
- is not strongly connected
- is not small
- is not countable
- is not one-way
- is not locally cocartesian coclosed
- does not have disjoint products
- is not codistributive
- is not unital
- is not finitary algebraic
- does not have zero morphisms
- is not counital
- is not countably codistributive
- does not have kernels
- does not satisfy CIP
- is not infinitary codistributive
- does not have cokernels
- does not satisfy CSP
*This also uses the deduced satisfied properties.
Unknown properties
There are 13 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: singleton space
- initial object: empty space
- products: direct product with the product topology
- coproducts: disjoint union with the disjoint union topology
Special morphisms
- isomorphisms: homeomorphisms
- monomorphisms: injective continuous maps
- epimorphisms: continuous maps with dense image
- regular monomorphisms: embeddings with closed image
- regular epimorphisms: