< RX < Modulo X^2-a < C
Sei eine positive reelle Zahl. Zeige, dass der Restklassenring isomorph
zu ist.
![{\displaystyle {}\mathbb {R} [X]/(X^{2}+a)}](../../../../I/12e10f933576cf85f22df324662bdf75d55a4b0a.svg)
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