no goals
α : Type u_1
α' : Type ?u.5371212
β : Type u_2
β' : Type ?u.5371218
γ : Type ?u.5371221
E : Type ?u.5371224
inst✝⁶ : MeasurableSpace α
inst✝⁵ : MeasurableSpace α'
inst✝⁴ : MeasurableSpace β
inst✝³ : MeasurableSpace β'
inst✝² : MeasurableSpace γ
μ μ' : Measure α
ν ν' : Measure β
τ : Measure γ
inst✝¹ : NormedAddCommGroup E
inst✝ : SigmaFinite ν
ρ : Measure (α × β)
⊢ ↑↑(fst ρ) univ = ↑↑ρ univ
rw [fst_apply MeasurableSet.univ, preimage_univ]