Adherent point

In mathematics, an adherent point (also closure point or point of closure or contact point) of a subset A of a topological space X, is a point x in X such that every open set containing x contains at least one point of $A$ . A point x is an adherent point for A if and only if x is in the closure of A.

单词	Adherent point
释义	Adherent point 英语百科 Adherent point In mathematics, an adherent point (also closure point or point of closure or contact point) of a subset A of a topological space X, is a point x in X such that every open set containing x contains at least one point of $A$ . A point x is an adherent point for A if and only if x is in the closure of A.
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