∀ {ι : Type u_1} {ι₁ : Type u_2} {ι₂ : Type u_3} {c : ComplexShape ι} {c₁ : ComplexShape ι₁} {c₂ : ComplexShape ι₂}
  {C : Type u_4} [inst : CategoryTheory.Category.{v_1, u_4} C] [inst_1 : CategoryTheory.Limits.HasZeroMorphisms C]
  {e₁ : c₁.Embedding c} {e₂ : c₂.Embedding c},
  e₁.AreComplementary e₂ → ∀ (K : HomologicalComplex C c), K.IsStrictlySupportedOutside e₁ ↔ K.IsStrictlySupported e₂