$R$ is a integral domain. How can I prove $R[x]$ is integrally closed iff $R$ is integrally closed?
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How can I prove R[x] is integrally closed iff R is integrally closed ? (R: integral domain) [closed]
closed as too localized by Qiaochu Yuan, Martin Brandenburg, Alon Amit, Robin Chapman, Gjergji Zaimi Jul 25 '10 at 12:14This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. If this question can be reworded to fit the rules in the help center, please edit the question. 

