Metric.packingNumber_two_mul_le_externalCoveringNumber

∀ {X : Type u_1} [inst : PseudoEMetricSpace X] (ε : NNReal) (A : Set X),
  Metric.packingNumber (2 * ε) A ≤ Metric.externalCoveringNumber ε A

The packing number of a set A for radius 2 * ε is at most the external covering number of A for radius ε.

Defined in: Mathlib.Topology.MetricSpace.CoveringNumbers
Cited by: 2 results in Mathlib
Foundations: Depth 149 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: PseudoEMetricSpace

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