∀ {R₁ : Type u_1} [inst : Semiring R₁] {M₁ : Type u_4} [inst_1 : TopologicalSpace M₁] [inst_2 : AddCommMonoid M₁]
  {M₂ : Type u_6} [inst_3 : TopologicalSpace M₂] [inst_4 : AddCommMonoid M₂] [inst_5 : Module R₁ M₁]
  [inst_6 : Module R₁ M₂] (f : M₁ →L[R₁] M₂) (c : R₁) (x : M₁), f (c • x) = c • f x