mem_codiscrete

∀ {X : Type u_1} [inst : TopologicalSpace X] {S : Set X},
  S ∈ Filter.codiscrete X ↔ ∀ (x : X), Disjoint (nhdsWithin x {x}ᶜ) (Filter.principal Sᶜ)

Defined in: Mathlib.Topology.DiscreteSubset
Cited by: 2 results in Mathlib
Foundations: Depth 75 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: TopologicalSpace

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