Re: question on rings



On 24 Okt., 01:35, Muhammad <mzafrul...@xxxxxxx> wrote:
Let Z be the set of integers, Q the set of rationals and let X be an
indeterminate over Q. Denote by Z + XQ[X] the set of polynomials over
Q with constant in Z. In the domain Z + XQ[X] every maximal ideal is
principal.

Hello,
does a non-principal ideal exist in Z + XQ[X]?
Sancho

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