Closed may refer to:

Mathematics

Closure (mathematics) In mathematics, a subset of a given set (mathematics), set is closed under an Operation (mathematics), operation on the larger set if performing that operation on members of the subset always produces a member of that subset. For example, the natu ...

, a set, along with operations, for which applying those operations on members always results in a member of the set *

Closed set In geometry, topology, and related branches of mathematics, a closed set is a Set (mathematics), set whose complement (set theory), complement is an open set. In a topological space, a closed set can be defined as a set which contains all its lim ...

, a set which contains all its limit points *

Closed interval In mathematics, a real interval is the set of all real numbers lying between two fixed endpoints with no "gaps". Each endpoint is either a real number or positive or negative infinity, indicating the interval extends without a bound. A real in ...

, an interval which includes its endpoints *

Closed line segment In geometry, a line segment is a part of a straight line that is bounded by two distinct endpoints (its extreme points), and contains every point on the line that is between its endpoints. It is a special case of an '' arc'', with zero curvat ...

, a line segment which includes its endpoints *

Closed manifold In mathematics, a closed manifold is a manifold Manifold with boundary, without boundary that is Compact space, compact. In comparison, an open manifold is a manifold without boundary that has only ''non-compact'' components. Examples The onl ...

, a compact manifold which has no boundary *

Closed differential form In mathematics, especially vector calculus and differential topology, a closed form is a differential form ''α'' whose exterior derivative is zero (); and an exact form is a differential form, ''α'', that is the exterior derivative of another di ...

, a differential form whose exterior derivative is 0

Sport

Closed tournament 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, ...

, a competition open to a limited category of players *

Closed (poker) In the game of poker, the play largely centers on the act of betting, and as such, a protocol has been developed to speed up play, lessen confusion, and increase security while playing. Different games are played using different types of bets, ...

, a betting round where no player will have the right to raise

Other uses

* ''Closed'' (album), a 2010 album by Bomb Factory *

Closed GmbH Closed GmbH is a German fashion brand which has produced jeans and other clothes{{cite web , url=http://www.wwd.com/fashion-news/fashion-scoops/heading-to-the-exit-7285399?src=nl/mornReport/20131121 , title=Kostas Murkudis Exiting German Brand ...

, a German fashion brand *

Closed class In grammar, a part of speech or part-of-speech ( abbreviated as POS or PoS, also known as word class or grammatical category) is a category of words (or, more generally, of lexical items) that have similar grammatical properties. Words that are ...

, in linguistics, a class of words or other entities which rarely changes

Mathematics

Sport

Other uses

See also