实群的单位表示与 Hodge 模的局部化理论
表示论
2025-02-18 v3 代数几何
摘要
我们证明了 Schmid 与第二作者的一项猜想:实约化李群具有实无穷小特征的表述之单位性,可从典范滤链即 Hodge 滤链读出。我们的证明依赖于三个主要要素。其一是混合 Hodge 模的穿壁理论:关键结果是,在某些自然族中,Hodge 滤链半连续变化,其跳跃由扩张函子控制。其二是 Beilinson-Bernstein 局部化的 Hodge 理论精细化:我们证明旗簇上混合 Hodge 模的 Hodge 滤链满足底层 -模所具备的通常上同调消失与整体生成性质。其三是温 Hodge 模上 Hodge 滤链的显式计算。作为我们工作的副产品,我们得到了 Saito 扭曲混合 Hodge 模 Kodaira 消失定理的一个版本、范畴 中某对象的 Hodge 滤链计算,以及旗簇上凝聚层的一系列新消失结果。
引用
@article{arxiv.2309.13215,
title = {Unitary representations of real groups and localization theory for Hodge modules},
author = {Dougal Davis and Kari Vilonen},
journal= {arXiv preprint arXiv:2309.13215},
year = {2025}
}
备注
v2: Substantial revision. The results of arXiv:2206.09091 have been merged into this paper, and both these and the main theorem on unitarity have been extended to non-linear reductive groups. The paper has also been reorganised and the exposition reworked in several places. v3: Correction of minor errors, added remarks about Theorem 1.5 and its history. 76 pages