Category:One-to-One Relations

This category contains results about One-to-One Relations.

A relation $\RR \subseteq S \times T$ is one-to-one if it is both many-to-one and one-to-many.

That is, every element of the domain of $\RR$ relates to no more than one element of its codomain, and every element of the image is related to by exactly one element of its domain.