The arithmetic of tame quotient singularities in dimension $2$
Algebraic Geometry
2023-11-29 v3 Number Theory
Abstract
Let be a field, a variety with tame quotient singularities and a resolution of singularities. Any smooth rational point lifts to by the Lang-Nishimura theorem, but if is singular this might be false. For certain types of singularities the rational point is guaranteed to lift, though; these are called singularities of type . This concept has applications in the study of the fields of moduli of varieties and yields an enhanced version of the Lang-Nishimura theorem where the smoothness assumption is relaxed. We classify completely the tame quotient singularities of type in dimension ; in particular, we show that every non-cyclic tame quotient singularity in dimension is of type , and most cyclic singularities are of type too.
Keywords
Cite
@article{arxiv.2211.05669,
title = {The arithmetic of tame quotient singularities in dimension $2$},
author = {Giulio Bresciani},
journal= {arXiv preprint arXiv:2211.05669},
year = {2023}
}