well-definedness of product of finitely generated ideals
Ler be of a commutative ring with nonzero unity. If
(1) |
and
(2) |
are two finitely generated ideals of , both with two , then the ideals
and
are equal.
Proof. By (1) and (2), for every , there are elements of such that
(3) |
Multiplying the equations (3) we see that
whence the generators of belong to and consecuently . The reverse containment is seen similarly.