# Interval

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**Interval tree**— In computer science, an interval tree, also called a segment tree or segtree, is an ordered tree data structure to hold intervals. Specifically, it allows one to efficiently find all intervals that overlap with any given interval or point. It is… …82

**Interval estimation**— In statistics, interval estimation is the use of sample data to calculate an interval of possible (or probable) values of an unknown population parameter. The most prevalent forms of interval estimation are: * confidence intervals (a frequentist… …83

**Interval cycle**— In music, an interval cycle is a collection of pitch classes created from a sequence of the same interval class.[1] In other words a collection of pitches by starting with a certain note and going up by a certain interval until the original note… …84

**Interval vector**— In musical set theory, an interval vector (also called an interval class vector or ic vector) is an array that expresses the intervallic content of a pitch class set.In 12 equal temperament it has six digits, with each digit standing for the… …85

**Interval graph**— In graph theory, an interval graph is the intersection graph of a set of intervals on the real line. It has one vertex for each interval in the set, and an edge between every pair of vertices corresponding to intervals that intersect.Formally,… …86

**Interval class**— In musical set theory, an interval class (usual abbreviation: ic) is the shortest distance in pitch class space between two unordered pitch classes. For example, the interval class between pitch classes 4 and 9 is 5 because 9 4 = 5 is less than 4 …87

**Interval exchange transformation**— In mathematics, an interval exchange transformation is a kind of dynamical system that generalises the idea of a circle rotation. The phase space consists of the unit interval, and the transformation acts by cutting the interval into several… …88

**Interval Research Corporation**— Infobox Defunct company company name = Interval Research Corporation company slogan = company type = Research think tank fate = closed in 2000 Predecessor = successor = foundation = 1992 defunct = 2000 location = Palo Alto industry = Research and …89

**Interval signal**— An interval signal, or tuning signal, is a characteristic sound or musical phrase used in international broadcasting and by some domestic broadcasters. Played before commencement or during breaks in transmission, or (most commonly) between… …90

**Interval workout**— An interval workout is a specific type of training for middle and distance runners. Also referred to as speed work or track work , an interval workout consists of shorter distances run at a faster pace to develop anaerobic strength. A break is… …