open covering

open covering

[′ō·pən ′kəv·ər·iŋ]
(mathematics)
For a set S in a topological space, a collection of open sets whose union contains S.
References in periodicals archive ?
A new NHS dental practice is set to open covering the areas of Birchgrove, Llanishen and Rhiwbina
Let U = {Ui/i G I} be (i, j) semi open covering of X.
The car had contained cans of green and white paint and they burst open covering the inside of the car and Hassall himself in paint.
The car had contained cans of green and white paint and they burst open covering the inside of the car, and Hassall himself was covered from head to toe in paint.