no goals
α : Type u_1
β : Type u_2
γ : Type ?u.52351
δ : Type ?u.52354
inst✝³ : MeasurableSpace α
inst✝² : MeasurableSpace β
inst✝¹ : MeasurableSpace γ
inst✝ : MeasurableSpace δ
μa : Measure α
μb : Measure β
μc : Measure γ
μd : Measure δ
f : α → β
hf : MeasurePreserving f
s : Set β
hs : MeasurableSet s
⊢ map f (restrict μa (f ⁻¹' s)) = restrict μb s
rw [← hf.map_eq, restrict_map hf.measurable hs]