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arXiv 0911.4473math.RTmath.AG
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加权射影线上的凝聚层引论

Introduction to coherent sheaves on weighted projective lines

Xiao-Wu Chen, Henning Krause

摘要:

这些笔记提供了一个描述的阿贝尔范畴出现的范畴的相干层的加权射影线。提出了两种不同的方法:一种是基于一个列表的公理和其他收益的描述方面的扩展阿贝尔范畴。通过对投影线插入多个权值,得到一条加权投影线。因此,我们详细地描述了射影线上的相干层范畴,而权的插入相当于添加简单的对象。我们称这个过程为“扩张”,并将其视为公理。因此,这些笔记大多致力于研究阿贝尔范畴,包括一个简短的讨论倾斜理论。我们提供了许多细节,并试图保持博览会尽可能独立。

英文摘要:

These notes provide a description of the abelian categories that arise as categories of coherent sheaves on weighted projective lines. Two different approaches are presented: one is based on a list of axioms and the other yields a description in terms of expansions of abelian categories. A weighted projective line is obtained from a projective line by inserting finitely many weights. So we describe the category of coherent sheaves on a projective line in some detail, and the insertion of weights amounts to adding simple objects. We call this process `expansion' and treat it axiomatically. Thus most of these notes are devoted to studying abelian categories, including a brief discussion of tilting theory. We provide many details and have tried to keep the exposition as self-contained as possible.

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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