theorem PiBase.Homeomorph.completelyNormalSpace {X : Type u_1} {Y : Type u_2} [TopologicalSpace X] [TopologicalSpace Y] [CompletelyNormalSpace X] (f : X ≃ₜ Y) : CompletelyNormalSpace Y

theorem PiBase.WellDefined.completelyNormalSpace : WellDefined CompletelyNormalSpace