English

Integral basis of pure fields with square-free parameter

Number Theory 2021-11-17 v1

Abstract

Let m0,±1m\neq0,\pm1 and n2n\geq 2 be integers. The ring of algebraic integers of the pure fields of type Q(mn)\mathbb{Q}(\sqrt[n]{m}) is explicitly known for n=2,3,4n=2,3,4. It is well known that for n=2n=2, an integral basis of the pure quadratic fields can be given parametrically, by using the remainder of the square-free part of mm modulo 4. Such characterisation of an integral basis also exists for cubic and quartic pure fields, but for higher degree pure fields there are only results for special cases.\\ In this paper we explicitly give an integral basis of the field Q(mn)\mathbb{Q}(\sqrt[n]{m}), where m±1m\neq\pm1 is square-free. Furthermore, we show that similarly to the quadratic case, an integral basis of Q(mn)\mathbb{Q}(\sqrt[n]{m}) is repeating periodically in mm with period length depending on nn.

Keywords

Cite

@article{arxiv.2111.08345,
  title  = {Integral basis of pure fields with square-free parameter},
  author = {László Remete},
  journal= {arXiv preprint arXiv:2111.08345},
  year   = {2021}
}
R2 v1 2026-06-24T07:40:18.044Z