A function which may (but does not necessarily) associate a given member of the range of with more than one member of the domain of . For example, trigonometric functions such as are many-to-one since .
See alsoDomain, Multivalued Function, One-to-One, Range
Explore with Wolfram|Alpha
More things to try:
Cite this as:
Weisstein, Eric W. "Many-to-One." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Many-to-One.html