table of contents

rule of assignment

2024-04-08

a rule of assignment is a subset of the cartesian product of two sets, having the property that each element of appears as the first coordinate of at most one ordered pair belonging to .

given a rule of assignment , the domain of is defined to be the subset of consisting of all first coordinates of elements of , and the image set of is defined as the subset of consisting of all second coordinates of elements of . formally,