Closed

Closed may refer to:

==Mathematics== Closure (mathematics), a set, along with operations, for which applying those operations on members always results in a member of the set Closed set, a set which contains all its limit points Closed interval, an interval which includes its endpoints Closed line segment, a line segment which includes its endpoints Closed manifold, a compact manifold which has no boundary Closed differential form, a differential form whose exterior derivative is 0