no goals
α : Type u_1
β : Type ?u.290469
γ : Type ?u.290472
δ : Type ?u.290475
ι : Type ?u.290478
R : Type ?u.290481
R' : Type ?u.290484
m0 : MeasurableSpace α
inst✝¹ : MeasurableSpace β
inst✝ : MeasurableSpace γ
μ μ₁ μ₂ μ₃ ν ν' ν₁ ν₂ : Measure α
s s' t : Set α
ht : NullMeasurableSet t
u : Set α
hu : MeasurableSet u
⊢ ↑↑(restrict (restrict μ t) s) u = ↑↑(restrict μ (s ∩ t)) u
simp only [restrict_apply hu, restrict_apply₀' ht, inter_assoc]