A function f which may (but does not necessarily) associate a given member of the range of f with more than one member of the domain of f. For example, trigonometric functions such as sinx are many-to-one since sinx=sin(2pi+x)=sin(4pi+x)=....

See also

Domain, Multivalued Function, One-to-One, Range

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Cite this as:

Weisstein, Eric W. "Many-to-One." From MathWorld--A Wolfram Web Resource.

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