SeparationQuotient.preimage_image_mk_open

∀ {X : Type u_1} [inst : TopologicalSpace X] {s : Set X},
  IsOpen s → SeparationQuotient.mk ⁻¹' SeparationQuotient.mk '' s = s

Defined in: Mathlib.Topology.Inseparable
Cited by: 2 results in Mathlib
Foundations: Depth 79 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: TopologicalSpace

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