Z[−5] : Halfway to Unique Factorization

Paul Pollack
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Abstract

It is well known that factorization is not unique in Z[−5]. We give a short, self-contained proof that Z[−5] is “halfway” toward being a unique factorization domain: For every nonzero, nonunit α∈Z[...
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Z[-5] : 唯一因式分解的半途而废
众所周知,因式分解在 Z[-5] 中不是唯一的。我们给出一个简短、自足的证明,证明 Z[-5] 是唯一因式分解域的 "一半":对于每一个非零、非单元 α∈Z[...
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