Same as 2-집적점,accumulation_point.

수학백과: 극한점 - "직관적으로 표현하면... 붙어있는"
https://encyclopediaofmath.org/wiki/Limit_point_of_a_set
https://mathworld.wolfram.com/LimitPoint.html
Limit_point limit point (or cluster point or accumulation point).... 근데 limit point = 극한점 ..... chk

limit_point
limit_point

극한점
극한점
극한점

Up: 극한,limit 점,point