中文

论幂零轨道覆盖的仿射化

表示论 2024-11-21 v2

摘要

g\mathfrak{g}C\mathbb{C} 上的简单经典李代数,GG 为伴随群。考虑幂零元 ege\in \mathfrak{g} 及伴随轨道 O=Ge\mathbb{O}=Ge。由于 Kraft 与 Procesi 的工作,闭包 Og\overline{\mathbb{O}}\subset \mathfrak{g} 中余维数 22 轨道的形式切片已为人所知。在本文中,我们对 O\mathbb{O} 的万有 GG-等变覆盖 O~\widetilde{\mathbb{O}} 证明了类似结果。即,我们描述了其仿射化 Spec(C[O~])Spec(\mathbb{C}[\widetilde{\mathbb{O}}]) 的余维数 22 奇点。

关键词

引用

@article{arxiv.2003.09356,
  title  = {On the affinization of a nilpotent orbit cover},
  author = {Dmytro Matvieievskyi},
  journal= {arXiv preprint arXiv:2003.09356},
  year   = {2024}
}

备注

I am grateful to Shilin Yu for pointing out a mistake in the first version of the paper. The second version includes description of symmetries acting on the codimension 2 singularities, and a discussion of expected symplectic duality, which this paper provides evidence to