Zeige, dass der Restklassenring R [ X ] / ( X 2 + 1 ) {\displaystyle {}\mathbb {R} [X]/(X^{2}+1)} isomorph zu C {\displaystyle {}{\mathbb {C} }} ist.
![{\displaystyle {}\mathbb {R} [X]/(X^{2}+1)}](https://wikimedia.org/api/rest_v1/media/math/render/svg/4158d3eed9573718c4d2d5d403ff66843dbb2bb5)
isomorph
zu 
ist.
