Source: wikibot/accumulation-point
= Accumulation point
{wiki=Accumulation_point}
An accumulation point (or limit point) of a subset \\( A \\) of a topological space \\( X \\) is a point \\( x \\in X \\) such that every neighborhood of \\( x \\) contains at least one point from \\( A \\) that is different from \\( x \\) itself.