Definition:Adherent Point/Definition 1

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Definition

Let $T = \left({X, \tau}\right)$ be a topological space.

Let $A \subseteq X$.


A point $x \in X$ is an adherent point of $A$ if and only if every open neighborhood $U$ of $x$ satisfies:

$A \cap U \ne \varnothing$


Also see

  • Results about adherent points can be found here.


Sources