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Interval may refer to:


Mathematics and physics

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Interval (mathematics) In mathematics, a (real) interval is a set of real numbers that contains all real numbers lying between any two numbers of the set. For example, the set of numbers satisfying is an interval which contains , , and all numbers in between. Othe ...
, a range of numbers ** Partially ordered set#Intervals, its generalization from numbers to arbitrary partially ordered sets * A statistical
level of measurement Level of measurement or scale of measure is a classification that describes the nature of information within the values assigned to variables. Psychologist Stanley Smith Stevens developed the best-known classification with four levels, or scal ...
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Interval estimate In statistics, interval estimation is the use of sample data to estimate an '' interval'' of plausible values of a parameter of interest. This is in contrast to point estimation, which gives a single value. The most prevalent forms of interval e ...
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Interval (graph theory) This is a glossary of graph theory. Graph theory is the study of graphs, systems of nodes or vertices connected in pairs by lines or edges. Symbols A B ...
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Space-time interval In physics, spacetime is a mathematical model that combines the three dimensions of space and one dimension of time into a single four-dimensional manifold. Spacetime diagrams can be used to visualize relativistic effects, such as why diffe ...
, the distance between two points in 4-space


Arts and entertainment


Dramatic arts

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Intermission An intermission, also known as an interval in British and Indian English, is a recess between parts of a performance or production, such as for a theatrical play, opera, concert, or film screening. It should not be confused with an entr'acte (F ...
, (British English: interval), a break in a theatrical performance ** ''
Entr'acte (or ', ;Since 1932–35 the French Academy recommends this spelling, with no apostrophe, so historical, ceremonial and traditional uses (such as the 1924 René Clair film title) are still spelled ''Entr'acte''. German: ' and ', Italian: ''inte ...
'', a French term for the same, but used in English often to mean a musical performance played during the break * ''Interval'' (play), a 1939 play by Sumner Locke Elliott * ''Interval'' (film), a 1973 film starring Merle Oberon


Music

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Interval (music) In music theory, an interval is a difference in pitch between two sounds. An interval may be described as horizontal, linear, or melodic if it refers to successively sounding tones, such as two adjacent pitches in a melody, and vertical or h ...
, the relationship in pitch between two notes *
Intervals (band) Intervals is a Canadian progressive metal band. Formed in Toronto, Ontario, the band has toured throughout Canada and the United States with bands such as Animals as Leaders, Protest the Hero, Between the Buried and Me and The Contortionist. ...
, a Canadian progressive metal band * ''Intervals'' (See You Next Tuesday album), 2008 * ''Intervals'' (Ahmad Jamal album), 1980


Sport

* Playing time (cricket)#Intervals, the breaks between play in cricket *
Interval training Interval training is a type of training exercise that involves a series of high-intensity workouts interspersed with rest or relief periods. The high-intensity periods are typically at or close to anaerobic exercise, while the recovery periods invo ...
, a training technique used by runners and cyclists


Other uses

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Interval Research Corporation Interval Research Corporation was founded in 1992 by Paul Allen and David Liddle. It was a Palo Alto laboratory and technology incubator focusing on consumer product applications and services with a focus on the Internet. A 1997 version of the co ...
, a technology think tank founded by Paul Allen *
Recess (break) Recess is a general term for a period in which a group of people are temporarily dismissed from their duties. In education, recess is the American and Australian term (known as ''break'' or ''playtime'' in the UK), where students have a mid m ...
, a break between classes, also called "interval" in New Zealand *
Jerry Interval Jerry Interval, (October 10, 1923 – December 4, 2006), was an American portrait photographer and educator. The early years Jerry Interval was born in Pittsburgh, Pennsylvania and grew up in the Brookline neighborhood of the city. When ...
(1923–2006), American portrait photographer and educator


See also

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Intermission (disambiguation) An intermission is a break in a play, concert or film, also in sports games. Intermission can also refer to: Albums *''Intermission (band)'', a 1993-1996 German Eurodance band *'' Soul Assassins: Intermission'', an album by California hip hop col ...
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InterVol InterVol is a community volunteering charity based in the United Kingdom.
, a UK volunteering charity *
Interval scheduling Interval scheduling is a class of problems in computer science, particularly in the area of algorithm design. The problems consider a set of tasks. Each task is represented by an ''interval'' describing the time in which it needs to be processed b ...
, a class of problems in computer science * {{disambiguation