English

On generalized deformation problems

Commutative Algebra 2024-12-04 v2

Abstract

Let (R,m)(R,m) be a Noetherian local ring and II an ideal with finite projective dimension. If R/IR/I satisfies some property P\mathcal{P}, it is natural to ask whether RR would also satisfy this property P\mathcal{P}. This is called the generalized deformation problem. In this paper we discuss some properties that would satisfy this problem. There are two main parts for this paper. In the first part we focus on F-singularities of characteristic pp. We show that F-injective satisfies this problem for the Cohen-Macaulay ring case and F-rational satisfies this problem for the excellent ring case. In the second part there is no restriction on the characteristic of RR, we show that when RR is catenary and equidimensional with II perfect, then the Serre's Condition RkR_k would satisfy the problem. And the Serre's Condition SkS_k, Rk+Sk+1R_k+S_{k+1}, normal rings, reduced rings and domains would always satisfy this problem.

Keywords

Cite

@article{arxiv.2305.00045,
  title  = {On generalized deformation problems},
  author = {Qiurui Li},
  journal= {arXiv preprint arXiv:2305.00045},
  year   = {2024}
}

Comments

We have fixed an error in the proof of the previous Proposotion 3.8 and Proposotion 3.9 by adding CM condition. The main results remain unchanged