Unary function
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In mathematics, a unary function is a function that takes one argument. A unary operation is a special kind of unary function, whose codomain coincides with its domain.
Examples
The successor function is a unary function. More specifically, it is a unary operation on the set of natural numbers.
Many of the elementary functions are unary functions, including the trigonometric functions, logarithm with a specified base, exponentiation to a particular power or base, and hyperbolic functions.
See also
Bibliography
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