∀ {X : Type u_1} [t : TopologicalSpace X] {C D : Set X} [inst : T2Space X] [inst_1 : Topology.RelCWComplex C D]
  (E : Topology.RelCWComplex.Subcomplex C) (n : ℕ) (i : ↑(E.I n)),
  Topology.RelCWComplex.map n i = Topology.RelCWComplex.map n ↑i