Assertion: set's subset | /r/HasProperty | open
Facets:
value: in x. a point
type: TEMPORAL
Source sentences:
text: A topological space X is hyperconnected if and only if every nonempty open set is dense in X. A topological space is submaximal if and only if every dense subset is open.
text: In mathematics, specifically in topology, the interior of a subset S of a topological space X is the union of all subsets of S that are open in X. A point that is in the interior of S is an interior point of S.