no goals
α : Type u_1
β : Type ?u.11608
γ : Type ?u.11611
δ : Type ?u.11614
δ' : Type ?u.11617
ι : Sort ?u.11620
s t u : Set α
MeasurableSet'✝¹ : Set α → Prop
measurableSet_empty✝¹ : MeasurableSet'✝¹ ∅
measurableSet_compl✝¹ : ∀ (s : Set α), MeasurableSet'✝¹ s → MeasurableSet'✝¹ (sᶜ)
measurableSet_iUnion✝¹ : ∀ (f : ℕ → Set α), (∀ (i : ℕ), MeasurableSet'✝¹ (f i)) → MeasurableSet'✝¹ (⋃ (i : ℕ), f i)
MeasurableSet'✝ : Set α → Prop
measurableSet_empty✝ : MeasurableSet'✝ ∅
measurableSet_compl✝ : ∀ (s : Set α), MeasurableSet'✝ s → MeasurableSet'✝ (sᶜ)
measurableSet_iUnion✝ : ∀ (f : ℕ → Set α), (∀ (i : ℕ), MeasurableSet'✝ (f i)) → MeasurableSet'✝ (⋃ (i : ℕ), f i)
x✝ : MeasurableSet = MeasurableSet
⊢ { MeasurableSet' := MeasurableSet'✝¹, measurableSet_empty := measurableSet_empty✝¹,
      measurableSet_compl := measurableSet_compl✝¹, measurableSet_iUnion := measurableSet_iUnion✝¹ } =
    { MeasurableSet' := MeasurableSet'✝, measurableSet_empty := measurableSet_empty✝,
      measurableSet_compl := measurableSet_compl✝, measurableSet_iUnion := measurableSet_iUnion✝ }
congr