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arXiv 1803.04044math.RTmath.CO
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Coxeter群和Coxeter表示

Coxeter groups and quiver representations

Hugh Thomas

摘要:

在这篇简短的笔记中,我展示了Coxeter群与非线性表示的相关性。我讨论(1)实根和虚根,(2)反射函子,(3)无挠的类和c-可排序元素。前两个主题是经典的,而第三个是最近的发展。证明了在含有100多个不可分解的rep Q中的无挠的类与相应的外尔群中的c-可排序元双射对应。这是由Ingalls和Thomas首先在Dynkin类型中建立的; Amiot,Iyama,Reiten和Todorov一般都表明了这一点。这个证明是基本的,基本上遵循Ingalls和Thomas的论证,但没有假设Q是Dynkin。

英文摘要:

In this expository note, I showcase the relevance of Coxeter groups to quiver representations. I discuss (1) real and imaginary roots, (2) reflection functors, and (3) torsion free classes and c-sortable elements. The first two topics are classical, while the third is a more recent development. I show that torsion free classes in rep Q containing finitely many indecomposables correspond bijectively to c-sortable elements in the corresponding Weyl group. This was first established in Dynkin type by Ingalls and Thomas; it was shown in general by Amiot, Iyama, Reiten, and Todorov. The proof in this note is elementary, essentially following the argument of Ingalls and Thomas, but without the assumption that Q is Dynkin.

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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