category of simplicial sets
The category of simplicial sets provides a fundamental combinatorial framework for representing spaces and -categories, with applications throughout algebraic topology, higher category theory, and homological algebra.
Satisfied properties
Assigned properties
- is locally small
- is a Grothendieck topos
- is semi-strongly connected
- has a generator
- is finitary algebraic
Deduced properties
- is locally finitely presentable
- is cocomplete
- is a generalized variety
- is multi-algebraic
- is connected
- has a generating collection
- is inhabited
- is locally essentially small
- is cartesian closed
- has exact filtered colimits
- is locally presentable
- has a subobject classifier
- is finitely accessible
- is accessible
- is complete
- has sifted colimits
- is ℵ₁-accessible
- has filtered-colimit-stable monomorphisms
- has effective congruences
- is locally finitely multi-presentable
- is multi-cocomplete
- has pullback-stable regular epimorphisms
- has finite products
- has filtered colimits
- is finitely complete
- has cartesian filtered colimits
- is concretizable
- is mono-regular
- is well-powered
- has a regular subobject classifier
- has connected colimits
- has coproducts
- is finitely cocomplete
- is locally ℵ₁-presentable
- has an extremal generating collection
- has ℵ₁-filtered colimits
- is Cauchy complete
- is locally multi-presentable
- has connected limits
- has products
- has equalizers
- is multi-complete
- is infinitary distributive
- is filtered
- has directed colimits
- has reflexive coequalizers
- is balanced
- has binary products
- has a terminal object
- has finite powers
- has pullbacks
- is an elementary topos
- has coequalizers
- has finite coproducts
- has a multi-initial object
- is cofiltered
- has copowers
- has ℵ₂-small coproducts
- has wide pushouts
- has powers
- has a multi-terminal object
- has quotients of congruences
- is countably distributive
- is distributive
- has coreflexive equalizers
- is sifted
- is ℵ₁-filtered
- has an extremal generator
- has ℵ₂-small products
- has binary powers
- has wide pullbacks
- has kernel pairs
- has disjoint finite coproducts
- is locally cartesian closed
- has a cogenerator
- has a cogenerating collection
- has an initial object
- is cosifted
- has sequential colimits
- has cosifted limits
- has countable coproducts
- has ℵ₂-small copowers
- has binary coproducts
- has finite copowers
- has pushouts
- has a parametrized natural numbers object
- is well-copowered
- is locally poly-presentable
- has a strict initial object
- has coequalizers of kernel pairs
- has disjoint coproducts
- is extensive
- has countable products
- has ℵ₂-small powers
- has cofiltered limits
- is a quasitopos
- has coquotients of cocongruences
- is ℵ₁-cofiltered
- has an extremal cogenerator
- has an extremal cogenerating collection
- has countable copowers
- has binary copowers
- has cokernel pairs
- is cototal
- has a natural numbers object
- has countable powers
- has cocartesian cofiltered limits
- is infinitary extensive
- is countably extensive
- has sequential limits
- is regular
- is coregular
- is total
- has a conatural numbers object
- has equalizers of cokernel pairs
- has directed limits
- has ℵ₁-cofiltered limits
- has effective cocongruences
- is epi-regular
- is Barr-exact
- has pushout-stable regular monomorphisms
- is co-Malcev
- is a pretopos
- is Barr-coexact
Unsatisfied properties
Assigned properties
- is not skeletal
- is not one-sorted finitary algebraic
Deduced properties*
- is not trivial
- is not gaunt
- is not direct
- is not inverse
- is not pointed
- is not core-connected
- is not discrete
- is not coaccessible
- is not regular-subobject-trivial
- is not infinitary coextensive
- is not unital
- is not strongly connected
- does not have zero morphisms
- is not subobject-trivial
- is not right cancellative
- is not Malcev
- is not counital
- is not locally copresentable
- is not ℵ₁-coaccessible
- is not essentially small
- is not locally multi-copresentable
- is not locally poly-copresentable
- is not self-dual
- is not thin
- is not additive
- does not have biproducts
- is not preadditive
- is not essentially discrete
- does not have kernels
- does not satisfy CIP
- is not a groupoid
- is not normal
- is not small
- is not essentially countable
- is not locally ℵ₁-copresentable
- is not co-Grothendieck abelian
- is not finitely coaccessible
- is not a dual generalized variety
- is not retract-trivial
- is not coextensive
- does not have cokernels
- does not satisfy CSP
- is not conormal
- is not a Grothendieck cotopos
- is not abelian
- does not have a strict terminal object
- does not have cofiltered-limit-stable epimorphisms
- is not left cancellative
- is not essentially finite
- is not countable
- is not one-way
- is not core-thin
- is not locally finite
- is not locally finitely copresentable
- is not dually finitary algebraic
- is not locally finitely multi-copresentable
- is not dually multi-algebraic
- is not cocartesian coclosed
- does not have disjoint finite products
- is not countably coextensive
- does not have a regular quotient object classifier
- is not regular-quotient-trivial
- is not an elementary cotopos
- is not a precotopos
- is not Grothendieck abelian
- is not split abelian
- is not finite
- does not have a coparametrized conatural numbers object
- is not dually one-sorted finitary algebraic
- is not locally cocartesian coclosed
- does not have disjoint products
- is not codistributive
- does not have exact cofiltered limits
- is not quotient-trivial
- does not have a quotient object classifier
- is not a quasicotopos
- 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: simplicial set with
- initial object: simplicial set with
- products: pointwise defined direct product
- coproducts: pointwise disjoint union
Special morphisms
- isomorphisms: natural isomorphisms
- monomorphisms: pointwise injective transformations
- epimorphisms: pointwise surjective transformations
- regular monomorphisms: same as monomorphisms
- regular epimorphisms: same as epimorphisms
Functors
The database stores 1 functor based on the category of simplicial sets.