Let the sets *THE* = {1, 2, 3} and *B* = {3, 4}.

With the help of the adjacent arrow diagram, we will form the set of all ordered pairs in which the first element belongs to the set. *THE* and the 2nd belongs to the set *B*.

So we get the set: {(1, 3), (1, 4), (2, 3), (2, 4), (3, 3), (3, 4)}

This set is called **cartesian product of THE per B**, being indicated by:

Soon:

Dice two sets*THE*and

*B*, nonempty, we call

**cartesian product**

*THE*x

*B*the set of all ordered pairs (

*x*,

*y*) Where Next: What is a 1st degree equation with two variables?