derivedSet_union

∀ {X : Type u_1} [inst : TopologicalSpace X] (A B : Set X), derivedSet (A ∪ B) = derivedSet A ∪ derivedSet B

Defined in: Mathlib.Topology.DerivedSet
Cited by: 1 results in Mathlib
Foundations: Depth 65 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: TopologicalSpace

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