open ball
open ball · open balls
The set of all points in a metric space whose distance from a given point is less than…The set of all points in a metric space whose distance from a given point ("the open ball's center") is less than a given length ("the open ball's radius").
Meaning
1 sensesThe set of all points in a metric space whose distance from a given point ("the open ball's center") is less than a given length ("the open ball's radius").