The category of bimodule objects over a pair of monoid objects. #
A bimodule object for a pair of monoid objects, all internal to some monoidal category.
- X : C
- actLeft : CategoryTheory.MonoidalCategory.tensorObj A.X self.X ⟶ self.X
- one_actLeft : CategoryTheory.CategoryStruct.comp (CategoryTheory.MonoidalCategory.whiskerRight A.one self.X) self.actLeft = (CategoryTheory.MonoidalCategory.leftUnitor self.X).hom
- left_assoc : CategoryTheory.CategoryStruct.comp (CategoryTheory.MonoidalCategory.whiskerRight A.mul self.X) self.actLeft = CategoryTheory.CategoryStruct.comp (CategoryTheory.MonoidalCategory.associator A.X A.X self.X).hom (CategoryTheory.CategoryStruct.comp (CategoryTheory.MonoidalCategory.whiskerLeft A.X self.actLeft) self.actLeft)
- actRight : CategoryTheory.MonoidalCategory.tensorObj self.X B.X ⟶ self.X
- actRight_one : CategoryTheory.CategoryStruct.comp (CategoryTheory.MonoidalCategory.whiskerLeft self.X B.one) self.actRight = (CategoryTheory.MonoidalCategory.rightUnitor self.X).hom
- right_assoc : CategoryTheory.CategoryStruct.comp (CategoryTheory.MonoidalCategory.whiskerLeft self.X B.mul) self.actRight = CategoryTheory.CategoryStruct.comp (CategoryTheory.MonoidalCategory.associator self.X B.X B.X).inv (CategoryTheory.CategoryStruct.comp (CategoryTheory.MonoidalCategory.whiskerRight self.actRight B.X) self.actRight)
- middle_assoc : CategoryTheory.CategoryStruct.comp (CategoryTheory.MonoidalCategory.whiskerRight self.actLeft B.X) self.actRight = CategoryTheory.CategoryStruct.comp (CategoryTheory.MonoidalCategory.associator A.X self.X B.X).hom (CategoryTheory.CategoryStruct.comp (CategoryTheory.MonoidalCategory.whiskerLeft A.X self.actRight) self.actLeft)
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A morphism of bimodule objects.
- hom : M.X ⟶ N.X
- left_act_hom : CategoryTheory.CategoryStruct.comp M.actLeft self.hom = CategoryTheory.CategoryStruct.comp (CategoryTheory.MonoidalCategory.whiskerLeft A.X self.hom) N.actLeft
- right_act_hom : CategoryTheory.CategoryStruct.comp M.actRight self.hom = CategoryTheory.CategoryStruct.comp (CategoryTheory.MonoidalCategory.whiskerRight self.hom B.X) N.actRight
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The identity morphism on a bimodule object.
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- M.id' = { hom := CategoryTheory.CategoryStruct.id M.X, left_act_hom := ⋯, right_act_hom := ⋯ }
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- M.homInhabited = { default := M.id' }
Composition of bimodule object morphisms.
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- Bimod.comp f g = { hom := CategoryTheory.CategoryStruct.comp f.hom g.hom, left_act_hom := ⋯, right_act_hom := ⋯ }
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- Bimod.instCategory = CategoryTheory.Category.mk ⋯ ⋯ ⋯
Construct an isomorphism of bimodules by giving an isomorphism between the underlying objects and checking compatibility with left and right actions only in the forward direction.
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A monoid object as a bimodule over itself.
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- Bimod.regular A = { X := A.X, actLeft := A.mul, one_actLeft := ⋯, left_assoc := ⋯, actRight := A.mul, actRight_one := ⋯, right_assoc := ⋯, middle_assoc := ⋯ }
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- Bimod.instInhabited A = { default := Bimod.regular A }
The forgetful functor from bimodule objects to the ambient category.
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- Bimod.forget A = { obj := fun (A_1 : Bimod A B) => A_1.X, map := fun {X Y : Bimod A B} (f : X ⟶ Y) => f.hom, map_id := ⋯, map_comp := ⋯ }
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The underlying object of the tensor product of two bimodules.
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Left action for the tensor product of two bimodules.
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Right action for the tensor product of two bimodules.
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Tensor product of two bimodule objects as a bimodule object.
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Left whiskering for morphisms of bimodule objects.
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Right whiskering for morphisms of bimodule objects.
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An auxiliary morphism for the definition of the underlying morphism of the forward component of the associator isomorphism.
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The underlying morphism of the forward component of the associator isomorphism.
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An auxiliary morphism for the definition of the underlying morphism of the inverse component of the associator isomorphism.
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The underlying morphism of the inverse component of the associator isomorphism.
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The underlying morphism of the forward component of the left unitor isomorphism.
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- Bimod.LeftUnitorBimod.hom P = CategoryTheory.Limits.coequalizer.desc P.actLeft ⋯
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The underlying morphism of the inverse component of the left unitor isomorphism.
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The underlying morphism of the forward component of the right unitor isomorphism.
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- Bimod.RightUnitorBimod.hom P = CategoryTheory.Limits.coequalizer.desc P.actRight ⋯
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The underlying morphism of the inverse component of the right unitor isomorphism.
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The associator as a bimodule isomorphism.
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- L.associatorBimod M N = Bimod.isoOfIso { hom := Bimod.AssociatorBimod.hom L M N, inv := Bimod.AssociatorBimod.inv L M N, hom_inv_id := ⋯, inv_hom_id := ⋯ } ⋯ ⋯
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The left unitor as a bimodule isomorphism.
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- M.leftUnitorBimod = Bimod.isoOfIso { hom := Bimod.LeftUnitorBimod.hom M, inv := Bimod.LeftUnitorBimod.inv M, hom_inv_id := ⋯, inv_hom_id := ⋯ } ⋯ ⋯
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The right unitor as a bimodule isomorphism.
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- M.rightUnitorBimod = Bimod.isoOfIso { hom := Bimod.RightUnitorBimod.hom M, inv := Bimod.RightUnitorBimod.inv M, hom_inv_id := ⋯, inv_hom_id := ⋯ } ⋯ ⋯
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The bicategory of algebras (monoids) and bimodules, all internal to some monoidal category.
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