Assertion: set | /r/HasProperty | ∂ s
Facets:
Source sentences:
text: with the closure of its complement: the set of points p ∈ X {\displaystyle p\in X} neighborhood of p {\displaystyle p} S {\displaystyle S} and at least one point not of S {\displaystyle S} : ∂ S := { p ∈ X ∣ ∀