setOfPred_isOpen_sSup

∀ {α : Type u} {T : Set (TopologicalSpace α)}, {s | IsOpen s} = ⋂ t ∈ T, {s | IsOpen s}

Defined in: Mathlib.Topology.Order
Cited by: 1 results in Mathlib
Foundations: Depth 64 from the axioms · uses propext, Classical.choice, Quot.sound

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