If I is an ideal in R, is I[x] (polynomials with coefficients in I) an ideal in the polynomial ring R[x]?
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Originally Posted by iwonde If I is an ideal in R, is I[x] (polynomials with coefficients in I) an ideal in the polynomial ring R[x]? Yes, and the proof is trivial. Try it. Tonio
Originally Posted by tonio Yes, and the proof is trivial. Try it. Tonio I'm sorry to mention this but I don't see how this is shown. Can anyone prove this?
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