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Theorems · Theorem · general topology

Metric.IsCover.isCompact

∀ {X : Type u_1} [inst : MetricSpace X] [ProperSpace X] {ε : NNReal} {s N : Set X},
  Metric.IsCover ε s N → IsClosed s → IsCompact N → IsCompact s

A closed set in a proper metric space which admits a compact cover is compact.

Defined in
Mathlib.Topology.MetricSpace.Cover
Cited by
1 results in Mathlib
Foundations
Depth 158 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes
MetricSpaceProperSpace

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