Theorem: MatrixCookbook.eq_509 (MatrixCookbook/10FunctionsAndOperators.lean)

State before:
ι : Type ?u.30122
R : Type u_3
l : Type ?u.30128
m : Type u_1
n : Type u_2
p : Type ?u.30137
q : Type u_5
r : Type u_4
inst✝¹² : Fintype l
inst✝¹¹ : Fintype m
inst✝¹⁰ : Fintype n
inst✝⁹ : Fintype p
inst✝⁸ : Fintype q
inst✝⁷ : Fintype r
inst✝⁶ : DecidableEq l
inst✝⁵ : DecidableEq m
inst✝⁴ : DecidableEq n
inst✝³ : DecidableEq p
inst✝² : DecidableEq q
inst✝¹ : DecidableEq r
inst✝ : Field R
a b : R
A : Matrix m n R
B : Matrix r q R
⊢ kroneckerMap (fun x x_1 => x * x_1) (a • A) (b • B) = (a * b) • kroneckerMap (fun x x_1 => x * x_1) A B
Tactic:
rw [smul_kronecker, kronecker_smul, smul_smul]
State after:
no goals