simplex category
The simplex category is a skeleton of . It plays an important role in topology and is used to define the category of simplicial sets. In older literature, it is also called the simplicial category, but nowadays this term usually refers to a simplicially enriched category.
Satisfied properties
Assigned properties
- is small
- is locally finite
- is countable
- has a terminal object
- is strongly connected
- has an extremal generator
- has an extremal cogenerator
- is skeletal
- has coequalizers
- is core-thin
- is mono-regular
- is epi-regular
- is cosifted
Deduced properties
- is connected
- has a multi-terminal object
- has effective congruences
- has quotients of congruences
- is semi-strongly connected
- is ℵ₁-filtered
- has an extremal generating collection
- has a generator
- is balanced
- is essentially small
- is locally small
- is essentially countable
- is locally essentially small
- is gaunt
- has coquotients of cocongruences
- has effective cocongruences
- has reflexive coequalizers
- is Cauchy complete
- has a cogenerator
- has an extremal cogenerating collection
- is accessible
- is ℵ₁-accessible
- is inhabited
- is filtered
- has a generating collection
- is well-copowered
- is well-powered
- is coaccessible
- is ℵ₁-coaccessible
- has a cogenerating collection
- has ℵ₁-filtered colimits
- is sifted
- is concretizable
- has ℵ₁-cofiltered limits
Unsatisfied properties
Assigned properties
- is not cofiltered
- does not have coreflexive equalizers
- does not have cokernel pairs
- does not have sequential colimits
- does not have sequential limits
- does not have a natural numbers object
- is not multi-complete
Deduced properties*
- does not have a parametrized natural numbers object
- does not have countable copowers
- does not have a strict terminal object
- is not pointed
- is not one-way
- is not left cancellative
- is not complete
- does not have equalizers
- does not have directed limits
- is not direct
- does not have pullbacks
- is not regular-subobject-trivial
- is not right cancellative
- is not thin
- is not finitely complete
- is not ℵ₁-cofiltered
- does not have directed colimits
- does not have countable coproducts
- is not inverse
- does not have cosifted limits
- does not have pushouts
- does not have equalizers of cokernel pairs
- is not regular-quotient-trivial
- is not self-dual
- is not Malcev
- is not unital
- is not countably distributive
- is not locally presentable
- is not locally cartesian closed
- does not have wide pullbacks
- does not have an initial object
- is not trivial
- is not discrete
- is not essentially discrete
- does not have exact filtered colimits
- is not countably extensive
- does not have filtered colimits
- is not a groupoid
- does not have connected limits
- is not regular
- does not have pullback-stable regular epimorphisms
- does not have a subobject classifier
- does not have a regular subobject classifier
- is not subobject-trivial
- does not have binary powers
- does not have countable powers
- does not have powers
- is not an elementary topos
- is not a quasitopos
- is not total
- is not counital
- is not locally finitely copresentable
- is not locally ℵ₁-copresentable
- is not locally copresentable
- is not locally cocartesian coclosed
- is not codistributive
- is not coextensive
- does not have cofiltered limits
- does not have zero morphisms
- does not have ℵ₂-small coproducts
- does not have ℵ₂-small copowers
- does not have binary coproducts
- does not have wide pushouts
- is not coregular
- does not have pushout-stable regular monomorphisms
- is not quotient-trivial
- does not have binary copowers
- does not have copowers
- is not cototal
- is not cocomplete
- is not locally finitely presentable
- is not locally ℵ₁-presentable
- is not Grothendieck abelian
- is not finitely accessible
- is not locally multi-presentable
- is not locally finitely multi-presentable
- is not locally poly-presentable
- is not preadditive
- is not abelian
- does not have biproducts
- is not finitary algebraic
- is not multi-algebraic
- is not infinitary distributive
- does not have kernels
- does not have cartesian filtered colimits
- does not have filtered-colimit-stable monomorphisms
- does not satisfy CIP
- is not infinitary extensive
- does not have sifted colimits
- does not have a strict initial object
- is not normal
- does not have products
- does not have countable products
- does not have binary products
- does not have ℵ₂-small powers
- does not have finite powers
- does not have kernel pairs
- is not Barr-exact
- is not a Grothendieck topos
- is not finitely coaccessible
- does not have a multi-initial object
- is not core-connected
- is not countably codistributive
- does not have cokernels
- does not have exact cofiltered limits
- does not have cocartesian cofiltered limits
- does not have cofiltered-limit-stable epimorphisms
- does not satisfy CSP
- is not countably coextensive
- is not infinitary coextensive
- is not conormal
- does not have coproducts
- does not have finite coproducts
- does not have finite copowers
- does not have connected colimits
- is not Barr-coexact
- is not essentially finite
- is not multi-cocomplete
- is not additive
- is not split abelian
- is not one-sorted finitary algebraic
- is not a generalized variety
- does not have disjoint coproducts
- does not have disjoint finite coproducts
- is not distributive
- is not extensive
- does not have ℵ₂-small products
- does not have finite products
- does not have coequalizers of kernel pairs
- is not a pretopos
- is not cocartesian coclosed
- is not finitely cocomplete
- does not have disjoint products
- is not infinitary codistributive
- is not cartesian closed
- is not finite
- is not co-Malcev
- does not have disjoint finite products
- does not have a quotient object classifier
- does not have a regular quotient object classifier
*This also uses the deduced satisfied properties.
Unknown properties
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Special objects
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Special morphisms
- isomorphisms: bijective order-preserving maps
- monomorphisms: injective order-preserving maps
- epimorphisms: surjective order-preserving maps
- regular monomorphisms: same as monomorphisms
- regular epimorphisms: same as epimorphisms