∀ {M₁ : Type u_3} {M₄ : Type u_5} [inst : TopologicalSpace M₁] [inst_1 : AddCommMonoid M₁]
  [inst_2 : TopologicalSpace M₄] [inst_3 : AddCommGroup M₄] [ContinuousNeg M₄] {f : M₁ → M₄},
  IsCompactOperator f → IsCompactOperator (-f)