pith. sign in

arxiv: math/0108003 · v1 · submitted 2001-08-01 · 🧮 math.AG · math.NT

Field of moduli and field of definition of Galois covers

classification 🧮 math.AG math.NT
keywords fieldcoversmodulidefinitionfieldsadicadmissibleapplies
0
0 comments X
read the original abstract

In this paper we investigate the cohomological obstruction for the field of moduli of a $G$-cover to be a field of definition, in the case of local fields and covers with tame admissible reduction. This applies in particular to $p$-adic fields where $p$ does not divide the order of the group $G$. We give examples of $G$-covers with field of moduli $\QQ_p$ that cannot be defined over $\QQ_p$, for all primes $p>5$.

This paper has not been read by Pith yet.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.