I am getting confused with this notation:
$R =\{x | x=a_i\times b_j;1\leq i\leq m \text{ and } 1\leq j\leq n\}$ where $a$ and $b$ are vectors of length $m$ and $n$ resp.
What does this mean? Does this mean x is the set of the products of the first element of a with all the elements of b and then the second element with all of b and so on?
(a1b1, a1b2, ..., a1bn,a2b1,a2b2...ambn)?