Documentation

Mathlib.CategoryTheory.Preadditive.Opposite

If C is preadditive, Cᵒᵖ has a natural preadditive structure. #

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instance CategoryTheory.instPreadditiveOpposite (C : Type u_1) [Category.{u_2, u_1} C] [Preadditive C] :
Preadditive Cᵒᵖ
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    instance CategoryTheory.moduleEndLeft (C : Type u_1) [Category.{u_2, u_1} C] [Preadditive C] {X Y : C} :
    Module (End X)ᵐᵒᵖ (X ⟶ Y)
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      @[simp]
      theorem CategoryTheory.unop_add (C : Type u_1) [Category.{u_2, u_1} C] [Preadditive C] {X Y : Cᵒᵖ} (f g : X ⟶ Y) :
      (f + g).unop = f.unop + g.unop
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      @[simp]
      theorem CategoryTheory.unop_zsmul (C : Type u_1) [Category.{u_2, u_1} C] [Preadditive C] {X Y : Cᵒᵖ} (k : ℤ) (f : X ⟶ Y) :
      (k • f).unop = k • f.unop
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      @[simp]
      theorem CategoryTheory.unop_neg (C : Type u_1) [Category.{u_2, u_1} C] [Preadditive C] {X Y : Cᵒᵖ} (f : X ⟶ Y) :
      (-f).unop = -f.unop
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      @[simp]
      theorem CategoryTheory.op_add (C : Type u_1) [Category.{u_2, u_1} C] [Preadditive C] {X Y : C} (f g : X ⟶ Y) :
      (f + g).op = f.op + g.op
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      @[simp]
      theorem CategoryTheory.op_zsmul (C : Type u_1) [Category.{u_2, u_1} C] [Preadditive C] {X Y : C} (k : ℤ) (f : X ⟶ Y) :
      (k • f).op = k • f.op
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      @[simp]
      theorem CategoryTheory.op_neg (C : Type u_1) [Category.{u_2, u_1} C] [Preadditive C] {X Y : C} (f : X ⟶ Y) :
      (-f).op = -f.op
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      def CategoryTheory.unopHom {C : Type u_1} [Category.{u_2, u_1} C] [Preadditive C] (X Y : Cᵒᵖ) :
      (X ⟶ Y) →+ (Opposite.unop Y ⟶ Opposite.unop X)

      unop induces morphisms of monoids on hom groups of a preadditive category

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          @[simp]
          theorem CategoryTheory.unopHom_apply {C : Type u_1} [Category.{u_2, u_1} C] [Preadditive C] (X Y : Cᵒᵖ) (f : X ⟶ Y) :
          (unopHom X Y) f = f.unop
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          @[simp]
          theorem CategoryTheory.unop_sum {C : Type u_1} [Category.{u_3, u_1} C] [Preadditive C] (X Y : Cᵒᵖ) {ι : Type u_2} (s : Finset ι) (f : ι → (X ⟶ Y)) :
          (s.sum f).unop = ∑ i ∈ s, (f i).unop
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          def CategoryTheory.opHom {C : Type u_1} [Category.{u_2, u_1} C] [Preadditive C] (X Y : C) :
          (X ⟶ Y) →+ (Opposite.op Y ⟶ Opposite.op X)

          op induces morphisms of monoids on hom groups of a preadditive category

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              @[simp]
              theorem CategoryTheory.opHom_apply {C : Type u_1} [Category.{u_2, u_1} C] [Preadditive C] (X Y : C) (f : X ⟶ Y) :
              (opHom X Y) f = f.op
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              @[simp]
              theorem CategoryTheory.op_sum {C : Type u_1} [Category.{u_3, u_1} C] [Preadditive C] (X Y : C) {ι : Type u_2} (s : Finset ι) (f : ι → (X ⟶ Y)) :
              (s.sum f).op = ∑ i ∈ s, (f i).op
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              def CategoryTheory.Preadditive.homSelfLinearEquivEndMulOpposite {C : Type u_1} [Category.{u_2, u_1} C] [Preadditive C] (G : C) :
              (G ⟶ G) ≃ₗ[(End G)ᵐᵒᵖ] (End G)ᵐᵒᵖ

              G ⟶ G and (End G)ᵐᵒᵖ are isomorphic as (End G)ᵐᵒᵖ-modules.

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                  @[simp]
                  theorem CategoryTheory.Preadditive.homSelfLinearEquivEndMulOpposite_symm_apply {C : Type u_1} [Category.{u_2, u_1} C] [Preadditive C] (G : C) (x✝ : (End G)ᵐᵒᵖ) :
                  (homSelfLinearEquivEndMulOpposite G).symm x✝ = match x✝ with | { unop' := f } => f
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                  @[simp]
                  theorem CategoryTheory.Preadditive.homSelfLinearEquivEndMulOpposite_apply {C : Type u_1} [Category.{u_2, u_1} C] [Preadditive C] (G : C) (f : G ⟶ G) :
                  (homSelfLinearEquivEndMulOpposite G) f = { unop' := f }
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                  instance CategoryTheory.Functor.op_additive {C : Type u_1} [Category.{u_3, u_1} C] [Preadditive C] {D : Type u_2} [Category.{u_4, u_2} D] [Preadditive D] (F : Functor C D) [F.Additive] :
                  F.op.Additive
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                  instance CategoryTheory.Functor.rightOp_additive {C : Type u_1} [Category.{u_3, u_1} C] [Preadditive C] {D : Type u_2} [Category.{u_4, u_2} D] [Preadditive D] (F : Functor Cᵒᵖ D) [F.Additive] :
                  F.rightOp.Additive
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                  instance CategoryTheory.Functor.leftOp_additive {C : Type u_1} [Category.{u_3, u_1} C] [Preadditive C] {D : Type u_2} [Category.{u_4, u_2} D] [Preadditive D] (F : Functor C Dᵒᵖ) [F.Additive] :
                  F.leftOp.Additive
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                  instance CategoryTheory.Functor.unop_additive {C : Type u_1} [Category.{u_3, u_1} C] [Preadditive C] {D : Type u_2} [Category.{u_4, u_2} D] [Preadditive D] (F : Functor Cᵒᵖ Dᵒᵖ) [F.Additive] :
                  F.unop.Additive