# correspondence

Correspondence is the property of two geometric figures in which in which angles, lines, and points in one bear a similar relationship to angles, lines, and points in another.
In set theory, two sets *A* and *B* are said to be in a one-to-one correspondence if every element of *A* can be mapped to an element
of *B* by a single function, with no two elements of *A* mapping
to the same element of *B*.