I need help with my homework! Can somebody help me please? I have to show that the subring of principal ideal ring need not to be a principal ideal ring. How can I do it? Thank you very much.
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Originally Posted by sidi I need help with my homework! Can somebody help me please? I have to show that the subring of principal ideal ring need not to be a principal ideal ring. How can I do it? Thank you very much. there are millions of examples. here's one: is not a PID but obviously is a PID.
Thanks
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