Section Diag.
Variable (F : fieldType).
Hint Resolve diagonalizable_diag : core.
Hint Resolve diagonalizable0 : core.

Lemma diagonalizable_conj_diag m n (V : 'M[F]_(m, n)) (d : 'rV[F]_n) :
stablemx V (diag_mx d) -> row_free V -> diagonalizable (conjmx V (diag_mx d)).