In mathematics, an operator is a function, usually of a special kind depending on the topic. For instance, in linear algebra an "operator" is a linear operator. In analysis an "operator" may be a differential operator, generalizing the ordinary derivative, or an integral operator, generalizing ordinary integration. Often, an "operator" is a function that acts on functions to produce other functions; or it may be a generalization of such a function, as in linear algebra, where some of the terminology reflects the origin of the subject in operations on the functions that are solutions of differential equations. One often thinks of an operator as dynamic, changing something into something else, whence the name; but this is only a way of thinking and not a formal definition.

An operator name or operator symbol is a notation that denotes a particular operator. When there is no danger of confusion, an operator name or operator symbol may be referred to more briefly as an "operator". Strictly speaking, however, the operator is a mathematical object and not the syntactic entity that denotes it. The reason for identifying it with its notation is that there are some operators that have come to have standard notations.

An example of an operator, specifically a differential operator, is the derivative itself. The corresponding operator name D, when placed before a differentiable function f, indicates that the function is to be differentiated with respect to the variable.

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Tour operators are predicting that traditional Spanish hotspots such as Majorca and the Costa will be ditched in favour of Turkey this year.
holsonline (Holidays Online Ltd) Thu, 07 Jan 2010 01:25:14 -0000
Tour operators are predicting that traditional Spanish hotspots such as Majorca and the Costa will be ditched in favour of Turkey this year.
Tour operators these days need to master Web 2.0 and use their CMS to maintain their websites with TLC ... daily
soulfreee (soulfree adventures) Wed, 06 Jan 2010 21:24:05 -0000
Tour operators these days need to master Web 2.0 and use their CMS to maintain their websites with TLC ... daily
Cheap Summer Holidays |Northern Cyprus Packages |Cyprus Tour Operators: Direct Traveller, a famous holiday company... http://bit.ly/72pNOL
yuppmarks (yuppmarks.com) Wed, 06 Jan 2010 20:49:43 -0000
Cheap Summer Holidays |Northern Cyprus Packages |Cyprus Tour Operators: Direct Traveller, a famous holiday company... http://bit.ly/72pNOL
Big Tour Operators 'Offer The Worst Service' - Focus on Travel News: Daily MailBig Tour Operators 'Offer Th.. http://bit.ly/8PjFSr
WeightnFitness (Sharper) Wed, 06 Jan 2010 19:15:02 -0000
Big Tour Operators 'Offer The Worst Service' - Focus on Travel News: Daily MailBig Tour Operators 'Offer Th.. http://bit.ly/8PjFSr
Brazil Tour Operators Association aims to raise awareness and heighten visibility among N. American travelers 4 all destinations in Brazil
HauteTravels (Haute Travels) Wed, 06 Jan 2010 19:03:00 -0000
Brazil Tour Operators Association aims to raise awareness and heighten visibility among N. American travelers 4 all destinations in Brazil
Members of the Brazil Tour Operators Association are happy to package Fernando de Noronha with other destinations in Pernambuco
HauteTravels (Haute Travels) Wed, 06 Jan 2010 18:59:55 -0000
Members of the Brazil Tour Operators Association are happy to package Fernando de Noronha with other destinations in Pernambuco

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