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Mathlib.Algebra.Category.Grp.Preadditive

The category of additive commutative groups is preadditive. #

@[implicit_reducible]
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@[simp]
theorem AddCommGrpCat.hom_add {M N : AddCommGrpCat} (f g : M ⟶ N) :
@[implicit_reducible]
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@[implicit_reducible]
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@[simp]
theorem AddCommGrpCat.hom_nsmul {M N : AddCommGrpCat} (n : ℕ) (f : M ⟶ N) :
Hom.hom (n • f) = n • Hom.hom f
@[implicit_reducible]
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@[simp]
theorem AddCommGrpCat.hom_neg {M N : AddCommGrpCat} (f : M ⟶ N) :
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@[simp]
theorem AddCommGrpCat.hom_sub {M N : AddCommGrpCat} (f g : M ⟶ N) :
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@[simp]
theorem AddCommGrpCat.hom_zsmul {M N : AddCommGrpCat} (n : ℤ) (f : M ⟶ N) :
Hom.hom (n • f) = n • Hom.hom f
@[implicit_reducible]
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def AddCommGrpCat.homAddEquiv {M N : AddCommGrpCat} :
(M ⟶ N) ≃+ (↑M →+ ↑N)

AddCommGrpCat.Hom.hom bundled as an additive equivalence.

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