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Theorems · Theorem · general topology

isCompactSystem_insert_univ_iff

∀ {α : Type u_1} {S : Set (Set α)}, IsCompactSystem (insert Set.univ S) ↔ IsCompactSystem S

A set system is a compact system iff adding univ gives a compact system.

Defined in
Mathlib.Topology.Compactness.CompactSystem
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Foundations
Depth 65 from the axioms · uses propext, Classical.choice, Quot.sound

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