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arXiv 2602.01440math.AC
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有限长度模的提升系统

Lifting systems for finite length modules

University of Nebraska(内布拉斯加大学);University of Utah(犹他大学);Texas Tech University(德克萨斯理工大学)

Benjamin Katz, Nawaj KC, Kesavan Mohana Sundaram, Andrew J. Soto Levins, Ryan Watson

AI总结:

本文提出提升系统概念,用于研究有限长度模沿局部环满射映射的提升问题,并给出了提升到正则局部环的条件。

摘要:

本文关注沿noetherian局部环的满射映射提升模块的问题,即给定满射映射φ∶R→S,一个有限生成的R-模L被称为M的朴素提升,如果L⊗R S≈M。我们关注所有M的朴素提升中的最大深度和维度,分别称为M沿φ的可提升深度和可提升维度。我们通过本文中引入的提升系统概念来处理这个问题。然后,我们提供了一种条件,即有限长度的模块在提升到正则局部环时的必要且充分条件,这基于提升系统。

英文摘要:

This paper is concerned with lifting modules along a surjective map of noetherian local rings, say $φ\colon R \twoheadrightarrow S$. A finitely generated $R$-module $L$ is a naive lift of an $S$-module $M$ if $L \otimes_R S \cong M$. We are concerned with the maximum depth and dimension among all naive lifts of $M$, which we call the liftable depth and liftable dimension, respectively, of $M$ along $φ$. We approach this via a notion of lifting systems that we introduce in this paper. We then provide a necessary and sufficient condition for a module of finite length to lift and Serre lift to a regular local ring in terms of lifting systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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