集しゅう積せき点てん

しゅ

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Meanings

1

noun

accumulation point; limit point

mathematics

Mathematical term in topology and analysis: a point such that every neighborhood contains infinitely many points of a given set.

極きょく限げん点てん
極限点 is a synonym for accumulation point, but 集積点 is more common in Japanese mathematical literature.
孤こ立りつ点てん
孤立点 (isolated point) is the opposite concept: a point that is not an accumulation point of a set.

Compound of 集積 (accumulation) + 点 (point), a calque of the English mathematical term 'accumulation point'.