Math Help - trouble with problem

1. trouble with problem

Let A={1,2,4,6,8} and for a, b, element A, define a partial order b if and only if b over a is an integer

2. Originally Posted by glost
Let A={1,2,4,6,8} and for a, b, element A, define a partial order b if and only if b over a is an integer
$a\mathcal{R} b \iff a|b$

if a divides b with remainder 0 then they are related.