< Achter Kreisteilungsring < Hauptideal < X^2+1 < Norm
Bestimme die Norm des Ideals im Zahlbereich
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![{\displaystyle {}\mathbb {Z} [X]/{\left(X^{4}+1\right)}}](../../../../../I/c003cfdadc7699776a0abec8e3ca3d71a84e6c06.svg)
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