English

Discriminant groups of wild cyclic quotient singularities

Algebraic Geometry 2023-05-10 v1

Abstract

Let p be prime. We describe explicitly the resolution of singularities of several families of wild Z/pZ-quotient singularities in dimension two, including families that generalize the quotient singularities of type E_6, E_7, and E_8 from p=2 to arbitrary characteristics. We prove that for odd primes, any power of p can appear as the determinant of the intersection matrix of a wild Z/pZ-quotient singularity. We also provide evidence towards the conjecture that in this situation one may choose the wild action to be ramified precisely at the origin.

Keywords

Cite

@article{arxiv.2101.08090,
  title  = {Discriminant groups of wild cyclic quotient singularities},
  author = {Dino Lorenzini and Stefan Schröer},
  journal= {arXiv preprint arXiv:2101.08090},
  year   = {2023}
}

Comments

44 pages

R2 v1 2026-06-23T22:20:57.664Z