Question

the subset of cartesian product of a and b is called

Answer 1

The set B is called the codomain.

• The subset of B consisting of the elements which are values of f (i.e., are assigned to some element in A) is called the range of f. (Think: the values of f range over the elements in this set.) The range of f is the set f(A) = {b : b ∈ B and b = f(a) for some a ∈ A}.