Having worked on prime ideals recently and finding them for Z_n I was wondering how you can to find all the prime ideals of a multiplication of Z/3Z X Z/9Z or Z/2Z X Z/4Z for example. I'm mostly having trouble starting this problem and feel that if I could get an idea where to start that I could finish off the proof myself.(adsbygoogle = window.adsbygoogle || []).push({});

Thanks

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# Prime Ideals of Z/3Z X Z/9Z

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