English

Division quaternion algebras over some cyclotomic fields

Number Theory 2024-02-13 v2

Abstract

Let p1,p2p_{1}, p_{2} be two distinct prime integers, let nn be a positive integer, nn3\geq 3 and let ξn\xi_{n} be a primitive root of order nn of the unity. In this paper we obtain a complete characterization for a quaternion algebra H(p1,p2)H\left(p_{1}, p_{2}\right) to be a division algebra over the nnth cyclotomic field Q(ξn)\mathbb{Q}\left(\xi_{n}\right), when nn\in{3,4,6,7,8,9,11,12}\left\{3,4,6,7,8,9,11,12\right\} and also we obtain a characterization for a quaternion algebra H(p1,p2)H\left(p_{1}, p_{2}\right) to be a division algebra over the nnth cyclotomic field Q(ξn)\mathbb{Q}\left(\xi_{n}\right), when nn\in{5,10}\left\{5,10\right\}. In the 4th section we obtain a complete characterization for a quaternion algebra HQ(ξn)(p1,p2)H_{\mathbb{Q}\left(\xi_{n}\right)}\left(p_{1}, p_{2}\right) to be a division algebra, when n=lk,n=l^{k}, with ll a prime integer, l3l\equiv 3 (mod 44) and kk a positive integer. In the last section of this article we obtain a complete characterization for a quaternion algebra HQ(ξl)(p1,p2)H_{\mathbb{Q}\left(\xi_{l}\right)}\left(p_{1}, p_{2}\right) to be a division algebra, when ll is a Fermat prime number.

Keywords

Cite

@article{arxiv.2303.02497,
  title  = {Division quaternion algebras over some cyclotomic fields},
  author = {Diana Savin},
  journal= {arXiv preprint arXiv:2303.02497},
  year   = {2024}
}

Comments

This is a revised version of the article. Categories: Number theory; Ring and algebras

R2 v1 2026-06-28T09:01:34.521Z