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arXiv math/0602514math.RT
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仿射李代数的分次零级可积表示

Graded level zero integrable representations of affine Lie algebras

Vyjayanthi Chari, Jacob Greenstein

摘要:

研究了仿射李代数的有限维权空间的可积零级表示范畴的结构。我们发现,这个类别具有较弱的版本的有限长度的属性,即一个不可分解的对象有1000多个简单的成分是非平凡的模块在相应的循环代数。此外,这一范畴中的任何对象都是不可分解的对象的直和,其中许多是非平凡的。我们得到了这一类块的参数化。

英文摘要:

We study the structure of the category of integrable level zero representations with finite dimensional weight spaces of affine Lie algebras. We show that this category possesses a weaker version of the finite length property, namely that an indecomposable object has finitely many simple constituents which are non-trivial as modules over the corresponding loop algebra. Moreover, any object in this category is a direct sum of indecomposables only finitely many of which are non-trivial. We obtain a parametrization of blocks in this category.

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