∀ {𝕜₁ : Type u_1} {𝕜₂ : Type u_2} [inst : NontriviallyNormedField 𝕜₁] [inst_1 : NormedField 𝕜₂] {σ₁₂ : 𝕜₁ →+* 𝕜₂}
  {M₁ : Type u_3} {M₂ : Type u_4} [inst_2 : SeminormedAddCommGroup M₁] [inst_3 : AddCommGroup M₂]
  [inst_4 : NormedSpace 𝕜₁ M₁] [inst_5 : Module 𝕜₂ M₂] [inst_6 : UniformSpace M₂] [inst_7 : IsUniformAddGroup M₂]
  [ContinuousConstSMul 𝕜₂ M₂] [T2Space M₂] [CompleteSpace M₂], IsClosed {f | IsCompactOperator ⇑f}