Perfect.subset_perfectKernel

∀ {X : Type u} [inst : TopologicalSpace X] {s P : Set X}, Perfect P → P ⊆ s → P ⊆ CantorBendixson.perfectKernel s

Every perfect subset of a set is contained in its perfect kernel.

Defined in: Mathlib.Topology.CantorBendixson
Cited by: 1 results in Mathlib
Foundations: Depth 64 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: TopologicalSpace

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