Documentation
Mathlib
.
Algebra
.
Category
.
GroupCat
.
Preadditive
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Mathlib
.
Algebra
.
Category
.
GroupCat
.
Preadditive
source
Imports
Init
Mathlib.CategoryTheory.Preadditive.Basic
Mathlib.Algebra.Category.GroupCat.Basic
Imported by
AddCommGroupCat
.
instAddCommGroupHomAddCommGroupCatToQuiverToCategoryStructInstAddCommGroupCatLargeCategory
AddCommGroupCat
.
hom_add_apply
AddCommGroupCat
.
instPreadditiveAddCommGroupCatInstAddCommGroupCatLargeCategory
The category of additive commutative groups is preadditive.
#
source
instance
AddCommGroupCat
.
instAddCommGroupHomAddCommGroupCatToQuiverToCategoryStructInstAddCommGroupCatLargeCategory
(P :
AddCommGroupCat
)
(Q :
AddCommGroupCat
)
:
AddCommGroup
(
P
⟶
Q
)
source
@[simp]
theorem
AddCommGroupCat
.
hom_add_apply
{P :
AddCommGroupCat
}
{Q :
AddCommGroupCat
}
(f :
P
⟶
Q
)
(g :
P
⟶
Q
)
(x :
↑
P
)
:
↑(
f
+
g
)
x
=
↑
f
x
+
↑
g
x
source
instance
AddCommGroupCat
.
instPreadditiveAddCommGroupCatInstAddCommGroupCatLargeCategory
:
CategoryTheory.Preadditive
AddCommGroupCat