Finset.isCompact_biUnion

∀ {X : Type u} {ι : Type u_1} [inst : TopologicalSpace X] (s : Finset ι) {f : ι → Set X},
  (∀ i ∈ s, IsCompact (f i)) → IsCompact (⋃ i ∈ s, f i)

Defined in: Mathlib.Topology.Compactness.Compact
Cited by: 5 results in Mathlib
Foundations: Depth 82 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: TopologicalSpace

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