isClosed_iff_clusterPt

∀ {X : Type u} [inst : TopologicalSpace X] {s : Set X}, IsClosed s ↔ ∀ (a : X), ClusterPt a (Filter.principal s) → a ∈ s

Defined in: Mathlib.Topology.ClusterPt
Cited by: 7 results in Mathlib
Foundations: Depth 75 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: TopologicalSpace

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