Es sei q ≥ 2 {\displaystyle {}q\geq 2} und L = Q [ X ] / ( X 3 − q ) {\displaystyle {}L=\mathbb {Q} [X]/(X^{3}-q)} .
![{\displaystyle {}L=\mathbb {Q} [X]/(X^{3}-q)}](https://wikimedia.org/api/rest_v1/media/math/render/svg/ee5d268edcd63a967b44c24fded306de2a3f8d70)
.