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operator

Overview page. Subjects: Chemistry — Biological Sciences.

The region of DNA at one end of an operon that acts as the binding site for a specific repressor protein, and so controls the functioning of adjacent cistrons.

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operator

Allan Beaver.

in A Dictionary of Travel and Tourism

P ublished online December 2012 .

Reference Entry. Subjects: Travel and Holiday. 25 words.

Commonly means ‘tour operator’, but increasingly the word also applies to the ‘operator’ of any form of transport, hotel group,

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operator

Simon Blackburn.

in The Oxford Dictionary of Philosophy

January 2008; p ublished online January 2008 .

Reference Entry. Subjects: Philosophy. 56 words.

A term that signifies an *operation. An operation is a *function, so operators include expressions like

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operator

Simon Blackburn.

in The Oxford Dictionary of Philosophy

January 2016; p ublished online March 2016 .

Reference Entry. Subjects: Philosophy. 56 words.

A term that signifies an *operation. An operation is a *function, so operators include expressions like

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Operators

Gary E. Bowman.

in Essential Quantum Mechanics

November 2007; p ublished online January 2008 .

Chapter. Subjects: Condensed Matter Physics. 6900 words.

This chapter develops a basic working knowledge of operators — objects central to quantum mechanics. The fact that quantum operators are linear determines how they may be manipulated, so...

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operator

in A Dictionary of Physics

January 2009; p ublished online January 2009 .

Reference Entry. Subjects: Physics. 46 words.

A mathematical symbol indicating that a specified operation should be carried out. For example, the operator √ in √x

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operator

Edited by Jonathan Law and Richard Rennie.

in A Dictionary of Physics

January 2015; p ublished online September 2015 .

Reference Entry. Subjects: Physics. 46 words.

A mathematical symbol indicating that a specified operation should be carried out. For example, the operator √ in √x

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operator

Elizabeth Martin.

in The New Oxford Dictionary for Scientific Writers and Editors

January 2009; p ublished online January 2009 .

Reference Entry. Subjects: Language Reference. 32 words.

Genetics

Symbol: O (ital.) Operators for leftwards or rightwards transcription units are designated by a subscript capital L or R

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operator

Overview page. Subjects: Computing.

1 A person responsible for the immediate supervision of the hardware of a computer system.

2 A function that can be applied to one or more operands so as...

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operator

Overview page. Subjects: Science and Mathematics.

A mathematical entity that performs a specific operation on a function to transform the function into another function. For example, the square root sign √ and the differentiation symbol d/dnull...

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gradient operator

Edited by Jonathan Law and Richard Rennie.

in A Dictionary of Physics

January 2015; p ublished online September 2015 .

Reference Entry. Subjects: Physics. 69 words.

The *operator∇=i∂/∂x+j∂/∂y+k∂/

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