IsClosed.interior_union_right

∀ {X : Type u} [inst : TopologicalSpace X] {s t : Set X}, IsClosed t → interior (s ∪ t) ⊆ interior s ∪ t

Defined in: Mathlib.Topology.Neighborhoods
Cited by: 0 results in Mathlib
Foundations: Depth 11 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: TopologicalSpace

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