Examples of Cartesian products
{a,b,c} × {1,2} = { (a,1), (a,2), (b,1), (b,2), (c,1), (c,2) }
If |S| = n and |T| = m, then |S × T| =
Let R be the set of all real numbers. Then:
R × R is the set of all points on a plane
R × R × R is the set of all points in the 3-D space
Let N be the set of all possible names (strings of at most 20
characters), and T be the set of all possible telephone numbers
(10-digit decimal numbers). Then every telephone directory can
be thought of as a subset of