category of finite sets and bijections
This category is also known as the permutation groupoid. It appears in the definition of a combinatorial species.
Satisfied properties
Assigned properties
- is locally small
- is locally finite
- is inhabited
- is a groupoid
- is essentially countable
Deduced properties
- has directed limits
- is self-dual
- is left cancellative
- is locally cartesian closed
- is essentially small
- is locally essentially small
- is subobject-trivial
- has directed colimits
- is right cancellative
- is locally cocartesian coclosed
- is quotient-trivial
- is finitely accessible
- is Cauchy complete
- has kernel pairs
- has pullbacks
- has filtered colimits
- has sequential limits
- has an extremal generating collection
- is well-powered
- is mono-regular
- is regular-subobject-trivial
- is finitely coaccessible
- has cokernel pairs
- has pushouts
- has cofiltered limits
- has sequential colimits
- has an extremal cogenerating collection
- is well-copowered
- is epi-regular
- is regular-quotient-trivial
- has filtered-colimit-stable monomorphisms
- is ℵ₁-accessible
- is accessible
- is a generalized variety
- has ℵ₁-filtered colimits
- has sifted colimits
- has a generating collection
- is balanced
- has wide pullbacks
- has coreflexive equalizers
- has pullback-stable regular epimorphisms
- is retract-trivial
- has cofiltered-limit-stable epimorphisms
- is ℵ₁-coaccessible
- is coaccessible
- is a dual generalized variety
- has ℵ₁-cofiltered limits
- has cosifted limits
- has a cogenerating collection
- has wide pushouts
- has reflexive coequalizers
- has pushout-stable regular monomorphisms
- is locally poly-presentable
- has effective congruences
- has quotients of congruences
- is concretizable
- is locally poly-copresentable
- has effective cocongruences
- has coquotients of cocongruences
- has coequalizers of kernel pairs
- has equalizers of cokernel pairs
Unsatisfied properties
Assigned properties
- is not small
- is not skeletal
- does not have a generator
- is not essentially finite
- is not countable
- is not connected
Deduced properties*
- is not Grothendieck abelian
- is not semi-strongly connected
- is not trivial
- is not sifted
- does not have an extremal generator
- is not finite
- is not thin
- is not gaunt
- is not direct
- is not co-Grothendieck abelian
- does not have disjoint products
- is not cosifted
- is not inverse
- does not have a cogenerator
- is not strongly connected
- is not core-connected
- is not discrete
- is not essentially discrete
- does not have disjoint coproducts
- is not infinitary extensive
- is not countably extensive
- is not filtered
- does not have binary coproducts
- is not one-sorted finitary algebraic
- does not have a multi-terminal object
- does not have equalizers
- does not have disjoint finite coproducts
- does not have binary copowers
- does not have countable powers
- is not core-thin
- does not have zero morphisms
- does not have powers
- is not infinitary coextensive
- is not countably coextensive
- is not cofiltered
- does not have binary products
- does not have an extremal cogenerator
- does not have a multi-initial object
- does not have coequalizers
- does not have disjoint finite products
- does not have binary powers
- does not have countable copowers
- does not have copowers
- is not preadditive
- does not have biproducts
- is not finitely complete
- is not multi-complete
- does not have a terminal object
- does not have kernels
- does not satisfy CIP
- is not extensive
- is not finitely cocomplete
- is not ℵ₁-filtered
- is not pointed
- is not normal
- does not have products
- does not have finite products
- does not have countable products
- does not have ℵ₂-small powers
- does not have finite powers
- does not have finite copowers
- does not have connected limits
- is not one-way
- is not an elementary topos
- is not multi-cocomplete
- does not have an initial object
- does not have cokernels
- does not satisfy CSP
- is not coextensive
- is not ℵ₁-cofiltered
- is not dually one-sorted finitary algebraic
- is not conormal
- does not have coproducts
- does not have finite coproducts
- does not have countable coproducts
- does not have ℵ₂-small copowers
- does not have connected colimits
- is not an elementary cotopos
- is not Malcev
- is not unital
- does not have a parametrized natural numbers object
- does not have a natural numbers object
- is not locally multi-presentable
- is not locally finitely multi-presentable
- is not additive
- is not abelian
- is not multi-algebraic
- is not cartesian closed
- is not complete
- is not infinitary distributive
- is not countably distributive
- is not distributive
- does not have exact filtered colimits
- does not have cartesian filtered colimits
- does not have a strict initial object
- does not have ℵ₂-small products
- is not regular
- does not have a subobject classifier
- does not have a regular subobject classifier
- is not a pretopos
- is not a quasitopos
- is not co-Malcev
- is not counital
- does not have a coparametrized conatural numbers object
- does not have a conatural numbers object
- is not locally multi-copresentable
- is not locally finitely multi-copresentable
- is not dually multi-algebraic
- is not cocartesian coclosed
- is not cocomplete
- is not infinitary codistributive
- is not countably codistributive
- is not codistributive
- does not have exact cofiltered limits
- does not have cocartesian cofiltered limits
- does not have a strict terminal object
- does not have ℵ₂-small coproducts
- is not coregular
- does not have a quotient object classifier
- does not have a regular quotient object classifier
- is not a precotopos
- is not a quasicotopos
- is not locally finitely presentable
- is not locally ℵ₁-presentable
- is not locally presentable
- is not finitary algebraic
- is not split abelian
- is not Barr-exact
- is not a Grothendieck topos
- is not total
- is not locally finitely copresentable
- is not locally ℵ₁-copresentable
- is not locally copresentable
- is not dually finitary algebraic
- is not Barr-coexact
- is not a Grothendieck cotopos
- is not cototal
*This also uses the deduced satisfied properties.
Unknown properties
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Special objects
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Special morphisms
- isomorphisms: every morphism
- monomorphisms: every morphism
- epimorphisms: every morphism
- regular monomorphisms: same as isomorphisms
- regular epimorphisms: same as isomorphisms