arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2012.11687math.RT
收藏

关于重复代数上有限维模的变形理论

On a deformation theory of finite dimensional modules over repetitive algebras

Adriana Fonce-Camacho, Hernán Giraldo, Pedro Rizzo, José A. Vélez-Marulanda

摘要:

设$Λ$是代数闭域$\mathbf{k}$上的基本有限维代数,$\widehatΛ$是$Λ$的重复代数.本文证明了:若$\widehat{V}$是$\mathbf{k}$上的有限维左$\widehatΛ$ -模,则$\widehat{V}$有一个定义良好的变形环$R(\widehatΛ,\widehat{V})$,它是一个局部完全Noether交换$\mathbf{k}$ -代数,其剩余域也同构于$\mathbf{k}$ .我们还证明了在$\underline{\mathrm{End}}_{\widehatΛ}(\widehat{V})=\mathbf{k}$的条件下,$R(\widehatΛ,\widehat{V})$是普适的,并且在这种情况下,$R(\widehatΛ,\widehat{V})$在取syzygies后是稳定的.我们将所得结果应用于$2$ -Kronecker代数的重复代数上的有限维模,这为$\mathbb{P}^1_{\mathbf{k}}$上相干层的有界导出范畴中的物体的形变理论提供了一种可供选择的方法

英文摘要:

Let $Λ$ be a basic finite dimensional algebra over an algebraically closed field $\mathbf{k}$, and let $\widehatΛ$ be the repetitive algebra of $Λ$. In this article, we prove that if $\widehat{V}$ is a left $\widehatΛ$-module with finite dimension over $\mathbf{k}$, then $\widehat{V}$ has a well-defined versal deformation ring $R(\widehatΛ,\widehat{V})$, which is a local complete Noetherian commutative $\mathbf{k}$-algebra whose residue field is also isomorphic to $\mathbf{k}$. We also prove that $R(\widehatΛ,\widehat{V})$ is universal provided that $\underline{\mathrm{End}}_{\widehatΛ}(\widehat{V})=\mathbf{k}$ and that in this situation, $R(\widehatΛ,\widehat{V})$ is stable after taking syzygies. We apply the obtained results to finite dimensional modules over the repetitive algebra of the $2$-Kronecker algebra, which provides an alternative approach to the deformation theory of objects in the bounded derived category of coherent sheaves over $\mathbb{P}^1_{\mathbf{k}}$

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。

↑