∀ {m : Type u_1} {𝔸 : Type u_4} [inst : Fintype m] [inst_1 : DecidableEq m] [inst_2 : NormedCommRing 𝔸]
  [NormedAlgebra ℚ 𝔸] [CompleteSpace 𝔸] (U A : Matrix m m 𝔸),
  IsUnit U → NormedSpace.exp (U⁻¹ * A * U) = U⁻¹ * NormedSpace.exp A * U