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One-to-One


A map is called "one-to-one" (or "1:1") if it is injective. However, being in "one-to-one correspondence" is synonymous with being a bijection. Unfortunately, this confusing terminology is widely used throughout the literature.


See also

Bijection, Bijective, Domain, Injection, Many-to-One, One-to-One Correspondence, Range, Single-Valued Function

This entry contributed by Margherita Barile

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Cite this as:

Barile, Margherita. "One-to-One." From MathWorld--A Wolfram Web Resource, created by Eric W. Weisstein. https://mathworld.wolfram.com/One-to-One.html

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