Small sets in the category of structured arrows #
Here we prove a technical result about small sets in the category of structured arrows that will be used in the proof of the Special Adjoint Functor Theorem.
instance
CategoryTheory.StructuredArrow.instSmallOfLocallySmall
{C : Type u₁}
[Category.{v₁, u₁} C]
{D : Type u₂}
[Category.{v₂, u₂} D]
{S : D}
{T : Functor C D}
[Small.{w, u₁} C]
[LocallySmall.{w, v₂, u₂} D]
:
instance
CategoryTheory.StructuredArrow.small_inverseImage_proj_of_locallySmall
{C : Type u₁}
[Category.{v₁, u₁} C]
{D : Type u₂}
[Category.{v₂, u₂} D]
{S : D}
{T : Functor C D}
{P : ObjectProperty C}
[ObjectProperty.Small.{v₁, v₁, u₁} P]
[LocallySmall.{v₁, v₂, u₂} D]
:
@[deprecated CategoryTheory.StructuredArrow.small_inverseImage_proj_of_locallySmall (since := "2025-10-07")]
theorem
CategoryTheory.StructuredArrow.small_proj_preimage_of_locallySmall
{C : Type u₁}
[Category.{v₁, u₁} C]
{D : Type u₂}
[Category.{v₂, u₂} D]
{S : D}
{T : Functor C D}
{P : ObjectProperty C}
[ObjectProperty.Small.{v₁, v₁, u₁} P]
[LocallySmall.{v₁, v₂, u₂} D]
:
Alias of CategoryTheory.StructuredArrow.small_inverseImage_proj_of_locallySmall.
instance
CategoryTheory.CostructuredArrow.instSmallOfLocallySmall
{C : Type u₁}
[Category.{v₁, u₁} C]
{D : Type u₂}
[Category.{v₂, u₂} D]
{S : Functor C D}
{T : D}
[Small.{w, u₁} C]
[LocallySmall.{w, v₂, u₂} D]
:
instance
CategoryTheory.CostructuredArrow.small_inverseImage_proj_of_locallySmall
{C : Type u₁}
[Category.{v₁, u₁} C]
{D : Type u₂}
[Category.{v₂, u₂} D]
{S : Functor C D}
{T : D}
{P : ObjectProperty C}
[ObjectProperty.Small.{v₁, v₁, u₁} P]
[LocallySmall.{v₁, v₂, u₂} D]
:
@[deprecated CategoryTheory.CostructuredArrow.small_inverseImage_proj_of_locallySmall (since := "2025-10-07")]
theorem
CategoryTheory.CostructuredArrow.small_proj_preimage_of_locallySmall
{C : Type u₁}
[Category.{v₁, u₁} C]
{D : Type u₂}
[Category.{v₂, u₂} D]
{S : Functor C D}
{T : D}
{P : ObjectProperty C}
[ObjectProperty.Small.{v₁, v₁, u₁} P]
[LocallySmall.{v₁, v₂, u₂} D]
:
Alias of CategoryTheory.CostructuredArrow.small_inverseImage_proj_of_locallySmall.