Chapter 9.1, Problem 39E

d the relationsS²fori= 1, 2, 3,4, , 6i’here

$S_1=\left\{\left(a,b\right)\in Z^2|a>b\right\}$,the greater than relation,

$S_2=\left\{\left(a,b\right)\in Z^2|a\ge b\right\}$,the greater than or equal to relation,

$S_3=\left\{\left(a,b\right)\in Z^2|a<b\right\}$,the less than relation,

$S_4=\left\{\left(a,b\right)\in Z^2|a\le b\right\}$,the less than or equal to relation,

$S_5=\left\{\left(a,b\right)\in Z^2|a=b\right\}$,the equal to relation,

$S_6=\left\{\left(a,b\right)\in Z^2|a\ne b\right\}$,the unequal to relation.