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Imports
Init
AddCombi.Mathlib.Algebra.Notation.Indicator
Mathlib.Algebra.Group.Action.Pointwise.Set.Basic
Imported by
indicator_one_smul
indicator_one_vadd
source
@[simp]
theorem
indicator_one_smul
{
α
:
Type
u_1}
{
G
:
Type
u_2}
{
M₀
:
Type
u_3}
[
One
M₀
]
[
Zero
M₀
]
[
Group
G
]
[
MulAction
G
α
]
(
g
:
G
)
(
s
:
Set
α
)
(
a
:
α
)
:
(
g
•
s
).
indicator
(fun (
x
:
α
) =>
1
)
a
=
s
.
indicator
(fun (
x
:
α
) =>
1
)
(
g
⁻¹
•
a
)
source
@[simp]
theorem
indicator_one_vadd
{
α
:
Type
u_1}
{
G
:
Type
u_2}
{
M₀
:
Type
u_3}
[
One
M₀
]
[
Zero
M₀
]
[
AddGroup
G
]
[
AddAction
G
α
]
(
g
:
G
)
(
s
:
Set
α
)
(
a
:
α
)
:
(
g
+ᵥ
s
).
indicator
(fun (
x
:
α
) =>
1
)
a
=
s
.
indicator
(fun (
x
:
α
) =>
1
)
(
-
g
+ᵥ
a
)