Theorem: Matrix.image_eq_range_submatrix (Matroid/ForMathlib/LinearAlgebra/Matrix/Rowspace.lean)

State before:
l : Type u_1
m : Type u_2
m' : Type u_3
n : Type u_4
n' : Type u_5
n₁ : Type u_6
n₂ : Type u_7
o : Type u_8
α : Type u_9
R : Type u_10
A✝ B : Matrix m n R
s✝ : Set m
t : Set n
A : Matrix m n α
s : Set m
⊢ A '' s = range (A.rowSubmatrix s).rowFun
Tactic:
aesop
State after:
no goals