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11 Egyptian Gods and Goddesses
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Why Is It Called Black Friday?
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8 Unusual Punishments Inflicted on Women Throughout History
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What Is the Difference Between a Typhoon and a Super Typhoon?
The Cheshire Cat is a fictional cat from Lewis Carroll's Alice's Adventures in Wonderland. (Alice in Wonderland)
11 Banned Books Through Time
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10 Greatest Baseball Players of All Time

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operator, in mathematics, any symbol that indicates an operation to be performed. Examples are Square root of√x (which indicates the square root is to be taken) and d/dx (which indicates differentiation with respect to x is to be performed). An operator may be regarded as a function, transformation, or map, in the sense that it associates or “maps” elements from one set to elements from another set. See also automorphism.