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arXiv 1708.04800math.NT
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数制优于订单

Number systems over orders

Attila Pethő, Jörg Thuswaldner

摘要:

令$\mathbb{K}$是度为$k$的数域,令$\mathcal{O}$是$\mathbb{K}$中的阶。\emph{generalized number system over $\mathcal{O}$}(简称GNS)是一对$(p,\mathcal{D})$,其中$p \in \mathcal{O}[x]$是一元的,而$\mathcal{D}\subset\mathcal{O}$是一个完整的残基系统,模$p(0)$包含$0$。如果每个$a \in \mathcal{O}[x]$允许一个具有$\ell\in\mathbb{N}$和$d_0,\ldots, d_{\ell-1}\in\mathcal{D}$的形式为$a \equiv \sum_{j =0}^{\ell-1} d_j x^j \pmod{p}$的表示,则称GNS $(p,\mathcal{D})$具有\emph{finiteness property}。对于$\mathbb{Z}^k$对$\mathbb{R}^k$的作用的给定基本域$\mathcal{F}$,我们关联一类$\mathcal{G}_\mathcal{F} := \{ (p, D_\mathcal{F}) \;:\; p \in \mathcal{O}[x] \}$ GNS,其数字集$D_\mathcal{F}$以自然的方式根据$\mathcal{F}$定义。我们能够证明一般结果的有限性性质的GNS在$\mathcal{G}_\mathcal{F}$的$p$的绝对系数$p(0)$的著名的“优势条件”的抽象版本。特别是,根据温和的条件下的拓扑结构的$\mathcal{F}$,我们的特点是有限性的$(p(x\pm m), D_\mathcal{F})$固定$p$和大$m\in\mathbb{N}$。利用我们的新理论,我们能够给出数域的幂整基与广义NS之间联系的一般结果。

英文摘要:

Let $\mathbb{K}$ be a number field of degree $k$ and let $\mathcal{O}$ be an order in $\mathbb{K}$. A \emph{generalized number system over $\mathcal{O}$} (GNS for short) is a pair $(p,\mathcal{D})$ where $p \in \mathcal{O}[x]$ is monic and $\mathcal{D}\subset\mathcal{O}$ is a complete residue system modulo $p(0)$ containing $0$. If each $a \in \mathcal{O}[x]$ admits a representation of the form $a \equiv \sum_{j =0}^{\ell-1} d_j x^j \pmod{p}$ with $\ell\in\mathbb{N}$ and $d_0,\ldots, d_{\ell-1}\in\mathcal{D}$ then the GNS $(p,\mathcal{D})$ is said to have the \emph{finiteness property}. To a given fundamental domain $\mathcal{F}$ of the action of $\mathbb{Z}^k$ on $\mathbb{R}^k$ we associate a class $\mathcal{G}_\mathcal{F} := \{ (p, D_\mathcal{F}) \;:\; p \in \mathcal{O}[x] \}$ of GNS whose digit sets $D_\mathcal{F}$ are defined in terms of $\mathcal{F}$ in a natural way. We are able to prove general results on the finiteness property of GNS in $\mathcal{G}_\mathcal{F}$ by giving an abstract version of the well-known "dominant condition" on the absolute coefficient $p(0)$ of $p$. In particular, depending on mild conditions on the topology of $\mathcal{F}$ we characterize the finiteness property of $(p(x\pm m), D_\mathcal{F})$ for fixed $p$ and large $m\in\mathbb{N}$. Using our new theory, we are able to give general results on the connection between power integral bases of number fields and GNS.

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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