Kreisteilungsring/p/Universelle Derivation/Kern/Aufgabe

Es sei ${}p$ eine Primzahl und ${}R_{p}$ der ${}p$ -te Kreisteilungsring. Bestimme den Kern der universellen Derivation

d\colon R_{p}\longrightarrow \Omega _{R_{p}{|}\mathbb {Z} },\,f\longmapsto df.

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