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arXiv 1706.09178math.NT
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完全正二次整数的加法结构

Additive structure of totally positive quadratic integers

Tomáš Hejda, Vítězslav Kala

摘要:

设$K=\mathbb Q(\sqrt D)$是一个实二次域.我们考虑$K$中的全正整数的加法半群$\mathcal O_K^+(+)$,确定了它的生成元(不可分解的整数)和关系,它们可以用$\sqrt D$的周期连分数很好地描述.我们还刻画了$K$中所有可唯一分解的整数,并估计了它们的范数。利用这些结果,我们证明了半群$\mathcal O_K^+(+)$完全决定实二次域$K$ .

英文摘要:

Let $K=\mathbb Q(\sqrt D)$ be a real quadratic field. We consider the additive semigroup $\mathcal O_K^+(+)$ of totally positive integers in $K$ and determine its generators (indecomposable integers) and relations; they can be nicely described in terms of the periodic continued fraction for $\sqrt D$. We also characterize all uniquely decomposable integers in $K$ and estimate their norms. Using these results, we prove that the semigroup $\mathcal O_K^+(+)$ completely determines the real quadratic field $K$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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