Closed may refer to:

Mathematics

*Closure (mathematics)
In mathematics, a subset
In mathematics
Mathematics (from Ancient Greek, Greek: ) includes the study of such topics as quantity (number theory), mathematical structure, structure (algebra), space (geometry), and calculus, change (mathema ...

, a set, along with operations, for which applying those operations on members always results in a member of the set
* Closed set
In geometry
Geometry (from the grc, γεωμετρία; ' "earth", ' "measurement") is, with , one of the oldest branches of . It is concerned with properties of space that are related with distance, shape, size, and relative position of ...

, a set which contains all its limit points
* Closed interval
In mathematics
Mathematics (from Greek: ) includes the study of such topics as numbers (arithmetic and number theory), formulas and related structures (algebra), shapes and spaces in which they are contained (geometry), and quantities and ...

, an interval which includes its endpoints
* Closed line segment
Image:Segment definition.svg, 250px, The geometric definition of a closed line segment: the intersection (Euclidean geometry), intersection of all points at or to the right of ''A'' with all points at or to the left of ''B''
In geometry, a line s ...

, 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
Other uses

*Closed (poker){{Unreferenced, date=June 2009
In the game of poker
Poker is any of a number of card games in which players wager over which hand
A hand is a prehensile, multi- fingered appendage located at the end of the forearm
The forearm is the re ...

, a betting round where no player will have the right to raise
* ''Closed'' (album), a 2010 album by Bomb Factory
* Closed GmbH
Closed GmbH is a German fashion brand which has produced jeans
Jeans are a type of pants
Trousers (British English), slacks, or pants are an item of clothing that might have originated in Central Asia, worn from the waist to the ankle ...

, a German fashion brand
* Closed class
In traditional grammar
A tradition is a belief
A belief is an Attitude (psychology), attitude that something is the case, or that some proposition about the world is truth, true. In epistemology, philosophers use the term "belief" to refer t ...

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

* *Close (disambiguation)
Close may refer to:
Music
* ''Close'' (Kim Wilde album), 1988
* ''Close'' (Marvin Sapp album), 2017
* ''Close'' (Sean Bonniwell album), 1969
* "Close" (Sub Focus song), 2014
* "Close" (Nick Jonas song), 2016
* " Close (to the Edit)", a 1984 so ...

* Closed loop (disambiguation)Closed loop or closed-loop may refer to:
Mathematics
* Loop (topology), a path whose initial point is equal to its terminal point
* Closed curve, a mathematical curve described as a set of continuous parametric equations over a closed interval of ...

* Closing (disambiguation)
Closing may refer to:
Business and law
* Closing (law), a closing argument, a summation
* Closing (real estate), the final step in executing a real estate transaction
* Closing (sales), the process of making a sale
* Closure (business), Closing a ...

* Closure (disambiguation)
Closure, clausure, or clojure may refer to:
Physical
* Closure (container)
Closures are devices and techniques used to close or seal container such as a bottle, Jug (container), jug, jar, Tube (container), tube, can (disambiguation)#Container, ...

* Open (disambiguation)
Open or OPEN may refer to:
citizen
Citizenship is the status of a person recognized under the law of a country
A country is a distinct territory, territorial body
or political entity. It is often referred to as the land of an individu ...

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