=+

(b) Take x and y to be equivalent if x 6 y lies in (0 ,,: n = 0, + 1, ... ), which is a subgroup. Let S contain one representative from each equivalence class

(each coset). Show that G = U, (S @ 6,), where the union is disjoint. Put H - U.(See ,, ) and show that G - H = Hee.