∀ (A : Type u_3) (K : Type u_2) (L : Type u_1) [inst : CommRing A] [inst_1 : Field K] [inst_2 : Field L]
  [inst_3 : Algebra A K] [inst_4 : Algebra K L] [inst_5 : Algebra A L] [IsScalarTower A K L],
  LinearMap.CompatibleSMul L K A K