α : Type u_1
β : Type u_2
γ : Type ?u.225359
ι : Type ?u.225362
inst✝⁴ : Countable ι
f✝ g✝ : α → β
m : MeasurableSpace α
inst✝³ : TopologicalSpace β
inst✝² : LinearOrder β
inst✝¹ : OrderClosedTopology β
inst✝ : PseudoMetrizableSpace β
f g : α → β
hf : StronglyMeasurable f
hg : StronglyMeasurable g
this✝¹ : MeasurableSpace (β × β) := borel (β × β)
this✝ : BorelSpace (β × β)
⊢ MeasurableSet {a | f a < g a}
α : Type u_1
β : Type u_2
γ : Type ?u.225359
ι : Type ?u.225362
inst✝⁴ : Countable ι
f✝ g✝ : α → β
m : MeasurableSpace α
inst✝³ : TopologicalSpace β
inst✝² : LinearOrder β
inst✝¹ : OrderClosedTopology β
inst✝ : PseudoMetrizableSpace β
f g : α → β
hf : StronglyMeasurable f
hg : StronglyMeasurable g
⊢ MeasurableSet {a | f a < g a}
borelize (β × β)
no goals
α : Type u_1
β : Type u_2
γ : Type ?u.225359
ι : Type ?u.225362
inst✝⁴ : Countable ι
f✝ g✝ : α → β
m : MeasurableSpace α
inst✝³ : TopologicalSpace β
inst✝² : LinearOrder β
inst✝¹ : OrderClosedTopology β
inst✝ : PseudoMetrizableSpace β
f g : α → β
hf : StronglyMeasurable f
hg : StronglyMeasurable g
this✝¹ : MeasurableSpace (β × β) := borel (β × β)
this✝ : BorelSpace (β × β)
⊢ MeasurableSet {a | f a < g a}
exact (hf.prod_mk hg).measurable isOpen_lt_prod.measurableSet