Doubling may refer to:

Mathematics

* Arithmetical doubling of a count or a measure, expressed as: **

Multiplication Multiplication is one of the four elementary mathematical operations of arithmetic, with the other ones being addition, subtraction, and division (mathematics), division. The result of a multiplication operation is called a ''Product (mathem ...

by 2 ** Increase by 100%, i.e. one-hundred

percent In mathematics, a percentage () is a number or ratio expressed as a fraction of 100. It is often denoted using the ''percent sign'' (%), although the abbreviations ''pct.'', ''pct'', and sometimes ''pc'' are also used. A percentage is a dime ...

Doubling the cube Doubling the cube, also known as the Delian problem, is an ancient geometry, geometric problem. Given the Edge (geometry), edge of a cube, the problem requires the construction of the edge of a second cube whose volume is double that of the first ...

(i. e., hypothetical geometric construction of a cube with twice the volume of a given cube) *

Doubling time The doubling time is the time it takes for a population to double in size/value. It is applied to population growth, inflation, resource extraction, consumption of goods, compound interest, the volume of malignant tumours, and many other things t ...

, the length of time required for a quantity to double in size or value *

Doubling map The dyadic transformation (also known as the dyadic map, bit shift map, 2''x'' mod 1 map, Bernoulli map, doubling map or sawtooth map) is the mapping (i.e., recurrence relation) : T: , 1) \to [0, 1)^\infty : x \mapsto (x_0, x_1, x_2, ...

, a particular infinite two-dimensional geometrical construction

Music

* The composition or performance of a melody with itself or itself transposed at a constant interval such as the octave, third, or sixth, Voicing (music)#Doubling * The assignment of a melody to two instruments in an arrangement * Multi-instrumentalist, The playing of two (or more) instruments alternately by a single player, e.g. ''Flute, doubling piccolo'' ** Musicians who play more than one woodwind instrument are called woodwind doublers or reed players *

Double tracking Double tracking or doubling is an audio recording technique in which a performer sings or plays along with their own prerecorded performance, usually to produce a stronger or bigger sound than can be obtained with a single voice or instrument ...

, a recording technique in which a musical part (or vocal) is recorded twice and mixed together, to strengthen or "fatten" the tone.

Other

Doubling (psychodrama) Doubling is a central method in psychodrama and is also used in other forms of therapy and counseling. In mediation, for example, it is an aid when translating between disputing parties in conflict resolution and is, therefore, a mediation strategy ...

is a technique of provoking a

protagonist A protagonist () is the main character of a story. The protagonist makes key decisions that affect the plot, primarily influencing the story and propelling it forward, and is often the character who faces the most significant obstacles. If a ...

by a participant, for effect. * Doubling in the theatre is where one actor plays more than one part in the same performance. *

Doubling (textiles) Doubling is a textile industry term synonymous with combining. It can be used for various processes during spinning (textiles), spinning. During the carding stage, several sources of roving are doubled together and drawn, to remove variations in th ...

is the process where six slivers of cotton are fed into a draw frame, stretched and drawn together to improve the uniformity of the roving before it is spun *

Doubling (naval tactic) The line of battle or the battle line is a tactic in naval warfare in which a fleet of ships (known as ships of the line) forms a line end to end. The first example of its use as a tactic is disputed—it has been variously claimed for date ...

was a means of focusing gunfire in formations of sailing warships maneuvering as a line of battle. *

Double knitting Double knitting is a form of hand knitting in which two fabrics are knitted simultaneously on one pair of needles. The fabrics may be inseparable, as in ''interlock knitted fabrics'', or they can simply be two unconnected fabrics. In principle, ...

is the process of combining two or more lengths of yarn into a single thread. * Doubling in

two-way radio A two-way radio is a radio transceiver (a radio that can both transmit and receive radio waves), which is used for bidirectional person-to-person voice communication with other users with similar radios, in contrast to a broadcast receiver, whi ...

, where two or more transmitters transmit at once on the same frequency, interfering with one another and garbling all messages. *

Syntactic doubling Syntactic gemination, or syntactic doubling, is an external sandhi phenomenon in Italian, other Romance languages spoken in Italy, and Finnish. It consists in the lengthening (gemination) of the initial consonant in certain contexts. It may also ...

is a phenomenon consisting in the lengthening (gemination) of the initial consonant of certain words * When more than one round is fired in a semiautomatic gas powered rifle with only one pull of the trigger, also known as a

slam fire A slamfire is a discharge of a firearm occurring as soon as a Cartridge (firearms), cartridge is being loaded into the Chamber (weaponry), chamber. Some firearms are designed to slamfire, but the term also describes a malfunction of self-loadin ...

. * Doubling trains tracks has two tracks for two direction traffic.

Mathematics

Music

Other

See also