Geometric stabilisation via $p$-adic integration
Geometric stabilisation via $p$-adic integration
复制标题
通过 $p$-adic 积分实现几何稳定
DOI:
10.1090/jams/948
复制
发表时间:
2018
影响因子:
3.9
通讯作者:
Paul Ziegler
中科院分区:
文献类型:
--
作者:
M. Groechenig;Dimitri Wyss;Paul Ziegler
In this article we give a new proof of Ng\^o's Geometric Stabilisation Theorem, which implies the Fundamental Lemma. This is a statement which relates the cohomology of Hitchin fibres for a quasi-split reductive group scheme $G$ to the cohomology of Hitchin fibres for the endoscopy groups $H_{\kappa}$. Our proof avoids the Decomposition and Support Theorem, instead the argument is based on results for $p$-adic integration on coarse moduli spaces of Deligne-Mumford stacks. Along the way we establish a description of the inertia stack of the (anisotropic) moduli stack of $G$-Higgs bundles in terms of endoscopic data, and extend duality for generic Hitchin fibres of Langlands dual group schemes to the quasi-split case.
影响因子:
1.8
作者:
Kenneth Ascher;Dori Bejleri
通讯作者:
Kenneth Ascher;Dori Bejleri