Closure (topology)
From Wiki @ Karl Jones dot com
In mathematics, the closure of a subset S in a topological space consists of all points in S plus the limit points of S.
The closure of S is also defined as the union of S and its boundary.
Description
Intuitively, these are all the points in S and "near" S. A point which is in the closure of S is a point of closure of S.
The notion of closure is in many ways dual to the notion of interior.
See also
- Interior algebra (Closure algebra)
- Point (topology)
- Topological space
External links
- Closure (topology) @ Wikipedia
