Fiber criteria for flatness and homomorphisms of flat affine group schemes

IF 0.8 2区 数学 Q2 MATHEMATICS Journal of Pure and Applied Algebra Pub Date : 2025-06-01 Epub Date: 2025-03-19 DOI:10.1016/j.jpaa.2025.107949
Phùng Hô Hai , Hop D. Nguyen , João Pedro dos Santos
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引用次数: 0

Abstract

A very useful result concerning flatness in Algebraic Geometry is EGA's “fiber” criterion. We propose similar fiber criteria to verify flatness of a module while avoiding “finiteness” assumptions. Motivated by a Tannakian viewpoint (where the category of representations comes to the front), we derive applications to the theory of affine and flat group schemes.
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平面仿射群方案的平面性和同态的纤维判据
代数几何中关于平面性的一个非常有用的结果是EGA的“纤维”判据。我们提出了类似的纤维标准来验证模块的平整度,同时避免了“有限”假设。在Tannakian观点的激励下(表示的范畴出现在前面),我们推导了仿射和平面群方案理论的应用。
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来源期刊
CiteScore
1.70
自引率
12.50%
发文量
225
审稿时长
17 days
期刊介绍: The Journal of Pure and Applied Algebra concentrates on that part of algebra likely to be of general mathematical interest: algebraic results with immediate applications, and the development of algebraic theories of sufficiently general relevance to allow for future applications.
期刊最新文献
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