English
In OpensMeasurableSpace, the structure separates points: for x ≠ y there exists a measurable set containing one but not the other.
Русский
В OpensMeasurableSpace структура разделяет точки: для x ≠ y существует измеримое множество, содержащее одну точку, но не другую.
LaTeX
$$$\\text{OpensMeasurableSpace.separatesPoints}$ (i.e. for any distinct x,y there exists a measurable set distinguishing them).$$
Lean4
instance (priority := 100) separatesPoints [T0Space α] : SeparatesPoints α :=
by
rw [separatesPoints_iff]
intro x y hxy
apply Inseparable.eq
rw [inseparable_iff_forall_isOpen]
exact fun s hs => hxy _ hs.measurableSet