English

Filtrations associated with singularities

Algebraic Geometry 2024-05-20 v1 Complex Variables

Abstract

We fix a complex analytic normal singularity germ (X,o)(X,o) of dimension 2\geq 2 and a (not necessarily irreducible) reduced Weil divisor (S,o)(X,o)(S,o)\subset (X,o). The embedded resolution of the pair determines a multi-index filtration of the local ring OX,o\mathcal{O}_{X,o}, which measures the embedded geometry of the pair. Furthermore, from the (induced) resolution of (S,o)(S,o) we also consider a multi-index filtration associated with (S,o)(S,o). This latter one can be lifted to a filtration of OX,o\mathcal{O}_{X,o} too. The main result proves that the second filtration of OX,o\mathcal{O}_{X,o} can be realized as a `limit' filtration of the first one (if we blow up certain centers sufficiently many times).

Keywords

Cite

@article{arxiv.2405.10898,
  title  = {Filtrations associated with singularities},
  author = {András Némethi and Willem Veys},
  journal= {arXiv preprint arXiv:2405.10898},
  year   = {2024}
}

Comments

10 pages

R2 v1 2026-06-28T16:31:00.702Z