English
Independence of two measurable spaces is equivalent to independence of the corresponding sets of measurable sets.
Русский
Независимость двух измеримых пространств эквивалентна независимости соответствующих множеств измеримых множеств.
LaTeX
$$$Indep m1 m2 μ \iff IndepSets {s | MeasurableSet[m1] s} {s | MeasurableSet[m2] s} μ$$
Lean4
theorem Indep_iff_IndepSets (m₁ m₂ : MeasurableSpace Ω) {_mΩ : MeasurableSpace Ω} (μ : Measure Ω) :
Indep m₁ m₂ μ ↔ IndepSets {s | MeasurableSet[m₁] s} {s | MeasurableSet[m₂] s} μ := by
simp only [Indep, IndepSets, Kernel.Indep]