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LeanCourse
.
MIL
.
C09_Linear_Algebra
.
S02_Subspaces
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Imports
Init
LeanCourse.Common
Mathlib.LinearAlgebra.Charpoly.Basic
Mathlib.LinearAlgebra.Eigenspace.Minpoly
Mathlib.LinearAlgebra.Matrix.Determinant.Basic
Imported by
preimage
source
def
preimage
{K :
Type
u_1}
[
Field
K
]
{V :
Type
u_2}
[
AddCommGroup
V
]
[
Module
K
V
]
{W :
Type
u_3}
[
AddCommGroup
W
]
[
Module
K
W
]
(φ :
V
→ₗ[
K
]
W
)
(H :
Submodule
K
W
)
:
Submodule
K
V
Equations
preimage
φ
H
=
{
carrier
:=
⇑
φ
⁻¹'
↑
H
,
add_mem'
:=
⋯
,
zero_mem'
:=
⋯
,
smul_mem'
:=
⋯
}
Instances For