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arXiv 1601.01062math.RT
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用正合范畴分层Hecke自同态代数

Stratifying Hecke endomorphism algebras using exact categories

Jie Du, Brian Parshall, Leonard Scott

摘要:

构造了一类新的具有分层结构的Hecke自同态代数。这个证明的一个新特点是通过构建整个精确范畴结构来接近困难的Ext^1消失条件,在这个结构中,类似的消失条件更容易检查。这项工作是第二次在一系列旨在证明一个猜想的作者在1998年出版。猜想涉及的扩大,在Kazhdan-Lusztig细胞理论的背景下,Hecke自同态代数相关的交叉特征表示论的有限群的李型。第二个版本纠正了一些错别字,并做了一些小的修改,其中一些修改是由一位匿名的裁判和一位以前帖子的读者提出的。

英文摘要:

The paper constructs new Hecke endomorphism algebras with a stratified structure. A novel feature of the proof is to approach difficult Ext^1 vanishing conditions by building entire exact category structures in which the analogous vanishing conditions are easier to check. This work is the second in a series aimed at proving a conjecture of the authors published in 1998. The conjecture concerns the enlargement, in a context of Kazhdan-Lusztig cell theory, of Hecke endomorphism algebras related to cross-characteristic representation theory of finite groups of Lie type. This second version corrects some typos and makes other small modifications, some motivated by an anonymous referee and a reader of a prior posting.

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