α : Type u_1
β : Type ?u.617950
γ : Type ?u.617953
δ : Type ?u.617956
ι : Type ?u.617959
R : Type ?u.617962
R' : Type ?u.617965
m0 : MeasurableSpace α
inst✝² : MeasurableSpace β
inst✝¹ : MeasurableSpace γ
μ μ₁ μ₂ μ₃ ν ν' ν₁ ν₂ : Measure α
s s' t : Set α
inst✝ : IsFiniteMeasure μ
⊢ measureUnivNNReal μ = 0 ↔ ↑(measureUnivNNReal μ) = 0
α : Type u_1
β : Type ?u.617950
γ : Type ?u.617953
δ : Type ?u.617956
ι : Type ?u.617959
R : Type ?u.617962
R' : Type ?u.617965
m0 : MeasurableSpace α
inst✝² : MeasurableSpace β
inst✝¹ : MeasurableSpace γ
μ μ₁ μ₂ μ₃ ν ν' ν₁ ν₂ : Measure α
s s' t : Set α
inst✝ : IsFiniteMeasure μ
⊢ measureUnivNNReal μ = 0 ↔ μ = 0
rw [← MeasureTheory.Measure.measure_univ_eq_zero, ← coe_measureUnivNNReal]
no goals
α : Type u_1
β : Type ?u.617950
γ : Type ?u.617953
δ : Type ?u.617956
ι : Type ?u.617959
R : Type ?u.617962
R' : Type ?u.617965
m0 : MeasurableSpace α
inst✝² : MeasurableSpace β
inst✝¹ : MeasurableSpace γ
μ μ₁ μ₂ μ₃ ν ν' ν₁ ν₂ : Measure α
s s' t : Set α
inst✝ : IsFiniteMeasure μ
⊢ measureUnivNNReal μ = 0 ↔ ↑(measureUnivNNReal μ) = 0
norm_cast