∀ {R₁ : Type u_1} [inst : Semiring R₁] {M₂ : Type u_6} [inst_1 : TopologicalSpace M₂] [inst_2 : AddCommMonoid M₂]
  [inst_3 : Module R₁ M₂] [inst_4 : TopologicalSpace R₁] [inst_5 : ContinuousSMul R₁ M₂] {f f' : M₂},
  ContinuousLinearMap.toSpanSingleton R₁ f = ContinuousLinearMap.toSpanSingleton R₁ f' ↔ f = f'