Arthur parameters and cuspidal automorphic modules of classical groups

• 成果类型: Article
• 署名作者: Jiang, Dihua; Zhang, Lei
• 刊物名称: ANNALS OF MATHEMATICS
• ISSN/ISSBN: 0003-486X
• DOI: 10.4007/annals.2020.191.3.2
• 发表日期: 2020
• 页码: 739-827
• 关键词: gross-prasad conjecture; local langlands correspondence; product l-functions; rigid inner forms; irreducible representations; unramified computation; bessel models; root numbers; gl(n); spectrum

摘要

The endoscopic classification via the stable trace formula comparison provides certain character relations between irreducible cuspidal automorphic representations of classical groups and their global Arthur parameters, which are certain automorphic representations of general linear groups. It is a question of J. Arthur and W. Schmid that asks how to construct concrete modules for irreducible cuspidal automorphic representations of classical groups in term of their global Arthur parameters? In this paper, we formulate a general construction of concrete modules, using Bessel periods, for cuspidal automorphic representations of classical groups with generic global Arthur parameters. Then we establish the theory for orthogonal and unitary groups, based on certain well expected conjectures. Among the consequences of the theory in this paper is that the global Gan-Gross-Prasad conjecture for those classical groups is proved in full generality in one direction and with a global assumption in the other direction.