English

Universal Characteristic-free Resolution of Singularities, I

Algebraic Geometry 2025-07-30 v1 Number Theory

Abstract

We prove that for any singular integral affine variety XX of finite presentation over a perfect field defined over Z\mathbb Z, there exists a smooth morphism from YY onto XX such that YY admits a resolution. That is, there exists a smooth scheme Y~\widetilde{Y} and a projective birational morphism from Y~\widetilde{Y} onto YY, followed by a smooth morphism from YY onto XX. Our approach differs fundamentally from existing methods, as we neither restrict to any specific singular variety nor fix the characteristic. Instead, we design a {\it universal} blowup process that {\it simultaneously} resolves all possible singularities, and, our method is entirely characteristic-free.

Keywords

Cite

@article{arxiv.2507.21400,
  title  = {Universal Characteristic-free Resolution of Singularities, I},
  author = {Yi Hu},
  journal= {arXiv preprint arXiv:2507.21400},
  year   = {2025}
}

Comments

162 pages. This paper represents the first 8 sections of arXiv:2203.03842, focusing entirely on Gr(3,n) instead of general Gr(d,n). Part II is straightforward and will follow