Transformation Groups ( IF 0.7 ) Pub Date : 2021-01-09 , DOI: 10.1007/s00031-020-09638-5 I. LOSEV
In this paper we classify the irreducible Harish-Chandra bimodules with full support over filtered quantizations of conical symplectic singularities under the condition that none of the slices to codimension 2 symplectic leaves has type E8. More precisely, consider the quantization 𝒜⋋ with parameter ⋋. We show that the top quotient \( \overline{\mathrm{HC}}\left(\mathcal{A}\lambda \right) \) of the category of Harish-Chandra 𝒜⋋-bimodules embeds into the category of representations of the algebraic fundamental group, Γ, of the open leaf. The image coincides with the representations of Γ/Γ⋋, where Γ⋋ is a normal subgroup of Γ that can be recovered from the quantization parameter ⋋ combinatorially. As an application of our results, we describe the Lusztig quotient group in terms of the geometry of the normalization of the orbit closure in almost all cases.
中文翻译:
量化的奇异奇异点上的HARISH-CHANDRA双峰
在本文中,我们将不可约Harish-Chandra双模分类,并在圆锥形奇点奇异点的滤波片均不具有E 8类型的条件下,在完全过滤的圆锥奇点奇异点的量化支持下进行分类。更确切地说,考虑量化𝒜 ⋋与参数⋋。我们证明Harish-Chandra⋋bi -bimodules类别的最高商\(\ overline {\ mathrm {HC}} \ left(\ mathcal {A} \ lambda \ right)\)嵌入到叶片的代数基群Γ。图像与Γ/ Γthe的表示重合,其中Γ⋋是Γ的正常子组,可以组合地从量化参数recovered恢复。作为我们结果的应用,我们在几乎所有情况下均以轨道闭合归一化的几何形状描述了Lusztig商群。