Hopf Galois module structure of dihedral degree $2p$ extensions of $\mathbb{Q}_p$
Number Theory
2021-05-26 v2
Abstract
Let be an odd prime. For field extensions with Galois group isomorphic to the dihedral group of order , we consider the problem of computing a basis of the associated order in each Hopf Galois structure and the module structure of the ring of integers . We solve the case in which is not totally ramified and present a practical method which provides a complete answer for the cases and . We see that within this family of dihedral extensions, the ring of integers is always free over the associated orders in the different Hopf Galois structures.
Keywords
Cite
@article{arxiv.2011.05024,
title = {Hopf Galois module structure of dihedral degree $2p$ extensions of $\mathbb{Q}_p$},
author = {Daniel Gil-Muñoz and Anna Rio},
journal= {arXiv preprint arXiv:2011.05024},
year = {2021}
}
Comments
The paper has been updated with a slightly different structure. We have fixed some mistakes and obtained different answers to the same questions