The minimal periodicity for integral bases of pure number fields

[2509.09457] The minimal periodicity for integral bases of pure number fields Skip to main content Search Submit Donate Log in Mathematics > Number Theory arXiv:2509.09457 (math) [Submitted on 11 Sep 2025 ( v1 ), last revised 25 Aug 2026 (this version, v3)] Title: The minimal periodicity for integral bases of pure number fields Authors: Khai-Hoan Nguyen-Dang View PDF HTML (experimental) Abstract: Fix $n\ge3$. For the pure field $K_a=\Bbb Q(\theta)$ with $\theta^n=a$, where $a\neq \pm1$ is $n$th-power-free, $x^n-a$ is irreducible over $\Bbb Q$, and Hypothesis~\textup{(\textbf{H})} holds, we encode an integral basis in the fixed coordinate $\{1,\theta,\dots,\theta^{n-1}\}$ by its \emph{shape}. We prove a sharp local-to-global principle: for each $p^e\!\parallel n$, the local shape at $p$ is determined by $a\bmod p^{\,e+1}$, and this precision is optimal. Moreover, the global shape is periodic with minimal modulus \[ M(n)=\prod_{p^e\parallel n}p^{\,e+1}=n\cdot\mathrm{rad}(n), \] providing many applications in the understanding integral bases of pure number fields. Comments: Comments welcome! v3: polished paper Subjects: Number Theory (math.NT) MSC classes: 11R04, 11R21 Cite as: arXiv:2509.09457 [math.NT] (or arXiv:2509.09457v3 [math.NT] for this version) https://doi.org/10.48550/arXiv.2509.09457 Focus to learn more arXiv-issued DOI via DataCite Submission history From: Khai-Hoan Nguyen-Dang [ view email ] [v1] Thu, 11 Sep 2025 13:42:12 UTC (23 KB) [v2] Thu, 8 Jan 2026 03:04:49 UTC (21 KB) [v3] Tue, 25 Aug 2026 03:52:05 UTC (23 KB) Full-text links: Access Paper: View PDF HTML (experimental) TeX Source view license Current browse context: math.NT < prev | next > new | recent | 2025-09 Change to browse by: math References & Citations NASA ADS Google Scholar Semantic Scholar export BibTeX citation Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer ( What is the Explorer? ) Connected Papers Toggle Connected Papers ( What is Connected Papers? ) Litmaps Toggle Litmaps ( What is Litmaps? ) scite.ai Toggle scite Smart Citations ( What are Smart Citations? ) Code, Data, Media Code, Data and Media Associated with this Article alphaXiv Toggle alphaXiv ( What is alphaXiv? ) Links to Code Toggle CatalyzeX Code Finder for Papers ( What is CatalyzeX? ) DagsHub Toggle DagsHub ( What is DagsHub? ) GotitPub Toggle Gotit.pub ( What is GotitPub? ) Huggingface Toggle Hugging Face ( What is Huggingface? ) ScienceCast Toggle ScienceCast ( What is ScienceCast? ) Demos Demos Replicate Toggle Replicate ( What is Replicate? ) Spaces Toggle Hugging Face Spaces ( What is Spaces? ) Spaces Toggle TXYZ.AI ( What is TXYZ.AI? ) Related Papers Recommenders and Search Tools Link to Influence Flower Influence Flower ( What are Influence Flowers? ) Core recommender toggle CORE Recommender ( What is CORE? ) Author Venue Institution Topic About arXivLabs arXivLabs: experimental projects with community collaborators arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs . Which authors of this paper are endorsers? | Disable MathJax ( What is MathJax? ) We gratefully acknowledge support from our major funders , member institutions , and all contributors. About · Help · Contact · Subscribe · Copyright · Privacy · Accessibility · Operational Status (opens in new tab) Major funding support from

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