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arXiv 1101.3702math.RT
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Springer归结的导出范畴上的仿射辫群作用

Affine braid group actions on derived categories of Springer resolutions

Roman Bezrukavnikov, Simon Riche

摘要:

本文构造并研究了半单代数群上的仿射辫群在与幂零锥的Springer分解有关的各种簇上的相干层的导出范畴上的作用。特别地,我们明确地描述了Artin辫群的作用。这一行动是一个“绝对版本”的Kazhdan-Lusztig-金兹伯格的建设仿射Hecke代数,并特别是使用的第一作者和伊万Mirkovic过程中的证明Lusztig的progratures等变K理论的施普林格纤维。

英文摘要:

In this paper we construct and study an action of the affine braid group associated to a semi-simple algebraic group on derived categories of coherent sheaves on various varieties related to the Springer resolution of the nilpotent cone. In particular, we describe explicitly the action of the Artin braid group. This action is a "categorical version" of Kazhdan--Lusztig--Ginzburg's construction of the affine Hecke algebra, and is used in particular by the first author and Ivan Mirkovic in the course of the proof of Lusztig's conjectures on equivariant K-theory of Springer fibers.

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