English

Geometric Divisors in Normal Local Domains

Algebraic Geometry 2016-06-08 v1

Abstract

Let A be the local ring at a point of a normal complex variety with completion R. Srinivas has asked about the possible images of the induced map from Cl A to Cl R over all geometric normal domains A with fixed completion R. We use Noether-Lefschetz theory to prove that all finitely generated subgroups are possible in some familiar cases. As a byproduct we show that every finitely generated abelian group appears as the class group of the local ring at the vertex of a cone over some smooth complex variety of each positive dimension.

Keywords

Cite

@article{arxiv.1606.01977,
  title  = {Geometric Divisors in Normal Local Domains},
  author = {John Brevik and Scott Nollet},
  journal= {arXiv preprint arXiv:1606.01977},
  year   = {2016}
}

Comments

15 pages

R2 v1 2026-06-22T14:19:10.115Z