olemus
eukleidilise ruumi alamhulga S selline punkt,
millest teatud kauguseni ei asu ükski teine hulga S punktidest
=
a point in a set such that the neighborhood of the point is devoid of any other points belonging to the set

näiteid
http://mathonline.wikidot.com/isolated-points

http://mathworld.wolfram.com/IsolatedPoint.html

ülevaateid
https://encyclopediaofmath.org/wiki/Isolated_point

https://proofwiki.org/wiki/Definition:Isolated_Point_(Real_Analysis)

https://en.wikipedia.org/wiki/Isolated_point