English

Computing Tate-Shafarevich groups of multinorm one tori of Kummer type

Number Theory 2022-11-22 v1

Abstract

A multinorm one torus associated to a commutative \'etale algebra LL over a global field kk is of Kummer type if each factor of LL is a cyclic Kummer extension. In this paper we compute the Tate-Shafarevich group of such tori based on recent works of Bayer-Fluckiger, T.-Y. Lee and Parimala, and of T.-Y.~Lee. We also implement an effective algorithm using SAGE which computes the Tate-Shafarevich groups when each factor of LL is contained in a fixed concrete bicyclic extension of kk.

Keywords

Cite

@article{arxiv.2211.11249,
  title  = {Computing Tate-Shafarevich groups of multinorm one tori of Kummer type},
  author = {Jun-Hao Huang and Fan-Yun Hung and Pei-Xin Liang and Chia-Fu Yu},
  journal= {arXiv preprint arXiv:2211.11249},
  year   = {2022}
}

Comments

17 pages, 3 figures, comments are welcome